[{"data":1,"prerenderedAt":10562},["ShallowReactive",2],{"navigation":3,"/models-and-databases/transactions":1016,"/models-and-databases/transactions-surround":10557},[4,54,89,123,165,211,253,331,389,439,462,488,514,540,578,624,650,672,702,736,774,800,850,856,862,868,874,928],{"title":5,"path":6,"stem":7,"children":8},"Introduction and Foundations","/introduction-and-foundations","01.introduction-and-foundations/01.index",[9,10,14,18,22,26,30,34,38,42,46,50],{"title":5,"path":6,"stem":7},{"title":11,"path":12,"stem":13},"What is Django","/introduction-and-foundations/what-is-django","01.introduction-and-foundations/02.what-is-django",{"title":15,"path":16,"stem":17},"Key Concepts and Philosophy","/introduction-and-foundations/key-concepts-and-philosophy","01.introduction-and-foundations/03.key-concepts-and-philosophy",{"title":19,"path":20,"stem":21},"MVC vs MVT: Understanding Django's Architecture","/introduction-and-foundations/mvc-vs-mvt","01.introduction-and-foundations/04.mvc-vs-mvt",{"title":23,"path":24,"stem":25},"Project Structure Overview","/introduction-and-foundations/project-structure-overview","01.introduction-and-foundations/05.project-structure-overview",{"title":27,"path":28,"stem":29},"Installing Django","/introduction-and-foundations/installing-django","01.introduction-and-foundations/06.installing-django",{"title":31,"path":32,"stem":33},"Creating Your First Django Project","/introduction-and-foundations/creating-first-project","01.introduction-and-foundations/07.creating-first-project",{"title":35,"path":36,"stem":37},"Creating Your First Django App","/introduction-and-foundations/creating-first-app","01.introduction-and-foundations/08.creating-first-app",{"title":39,"path":40,"stem":41},"Your First Django \"Hello World\"","/introduction-and-foundations/hello-world","01.introduction-and-foundations/09.hello-world",{"title":43,"path":44,"stem":45},"Django Quick Start Guide","/introduction-and-foundations/quick-start-guide","01.introduction-and-foundations/10.quick-start-guide",{"title":47,"path":48,"stem":49},"How Django Handles Requests","/introduction-and-foundations/how-django-handles-requests","01.introduction-and-foundations/11.how-django-handles-requests",{"title":51,"path":52,"stem":53},"Django Settings","/introduction-and-foundations/django-settings","01.introduction-and-foundations/12.django-settings",{"title":55,"path":56,"stem":57,"children":58},"The Development Environment","/development-environment","02.development-environment/1.index",[59,61,65,69,73,77,81,85],{"title":60,"path":56,"stem":57},"Development Environment",{"title":62,"path":63,"stem":64},"Recommended Tooling for Django Development","/development-environment/recommended-tooling","02.development-environment/2.recommended-tooling",{"title":66,"path":67,"stem":68},"Virtual Environments","/development-environment/virtual-environments","02.development-environment/3.virtual-environments",{"title":70,"path":71,"stem":72},"Django Admin and Management Commands","/development-environment/admin-and-management-commands","02.development-environment/4.admin-and-management-commands",{"title":74,"path":75,"stem":76},"Django Project Settings","/development-environment/project-settings","02.development-environment/5.project-settings",{"title":78,"path":79,"stem":80},"Managing Django Environments: Local, Staging, and Production","/development-environment/environments-local-staging-production","02.development-environment/6.environments-local-staging-production",{"title":82,"path":83,"stem":84},"Running Django Development Server","/development-environment/running-development-server","02.development-environment/7.running-development-server",{"title":86,"path":87,"stem":88},"Working with Django Shell","/development-environment/working-with-shell","02.development-environment/8.working-with-shell",{"title":90,"path":91,"stem":92,"children":93},"Templates and Presentation Layer","/templates-and-presentation","03.templates-and-presentation/1.index",[94,95,99,103,107,111,115,119],{"title":90,"path":91,"stem":92},{"title":96,"path":97,"stem":98},"Introduction to Django Templates","/templates-and-presentation/introduction-to-templates","03.templates-and-presentation/2.introduction-to-templates",{"title":100,"path":101,"stem":102},"The Django Template Language","/templates-and-presentation/django-template-language","03.templates-and-presentation/3.django-template-language",{"title":104,"path":105,"stem":106},"Template Inheritance","/templates-and-presentation/template-inheritance","03.templates-and-presentation/4.template-inheritance",{"title":108,"path":109,"stem":110},"Built-in Template Tags and Filters","/templates-and-presentation/built-in-template-tags-and-filters","03.templates-and-presentation/5.built-in-template-tags-and-filters",{"title":112,"path":113,"stem":114},"Including Static Files","/templates-and-presentation/including-static-files","03.templates-and-presentation/6.including-static-files",{"title":116,"path":117,"stem":118},"Working with Media Files","/templates-and-presentation/working-with-media-files","03.templates-and-presentation/7.working-with-media-files",{"title":120,"path":121,"stem":122},"Using Alternative Template Engines","/templates-and-presentation/using-alternative-template-engines","03.templates-and-presentation/8.using-alternative-template-engines",{"title":124,"path":125,"stem":126,"children":127},"URLs and Views","/urls-and-views","04.urls-and-views/01.index",[128,129,133,137,141,145,149,153,157,161],{"title":124,"path":125,"stem":126},{"title":130,"path":131,"stem":132},"The URL Dispatcher","/urls-and-views/the-url-dispatcher","04.urls-and-views/02.the-url-dispatcher",{"title":134,"path":135,"stem":136},"Writing Function-Based Views","/urls-and-views/writing-function-based-views","04.urls-and-views/03.writing-function-based-views",{"title":138,"path":139,"stem":140},"View Decorators","/urls-and-views/view-decorators","04.urls-and-views/04.view-decorators",{"title":142,"path":143,"stem":144},"Rendering Responses","/urls-and-views/rendering-responses","04.urls-and-views/05.rendering-responses",{"title":146,"path":147,"stem":148},"Redirects","/urls-and-views/redirects","04.urls-and-views/06.redirects",{"title":150,"path":151,"stem":152},"Handling HTTP Methods","/urls-and-views/handling-http-methods","04.urls-and-views/07.handling-http-methods",{"title":154,"path":155,"stem":156},"Conditional View Processing","/urls-and-views/conditional-view-processing","04.urls-and-views/08.conditional-view-processing",{"title":158,"path":159,"stem":160},"File Uploads","/urls-and-views/file-uploads","04.urls-and-views/09.file-uploads",{"title":162,"path":163,"stem":164},"Using Django Shortcut Functions","/urls-and-views/using-django-shortcut-functions","04.urls-and-views/10.using-django-shortcut-functions",{"title":166,"path":167,"stem":168,"children":169},"Class Based Views","/class-based-views","05.class-based-views/01.index",[170,171,175,179,183,187,191,195,199,203,207],{"title":166,"path":167,"stem":168},{"title":172,"path":173,"stem":174},"Introduction to Class-Based Views","/class-based-views/introduction-to-class-based-views","05.class-based-views/02.introduction-to-class-based-views",{"title":176,"path":177,"stem":178},"Common Base Classes","/class-based-views/common-base-classes","05.class-based-views/03.common-base-classes",{"title":180,"path":181,"stem":182},"Built-in Generic Views","/class-based-views/built-in-generic-views","05.class-based-views/04.built-in-generic-views",{"title":184,"path":185,"stem":186},"Views for CRUD Operations","/class-based-views/views-for-crud-operations","05.class-based-views/05.views-for-crud-operations",{"title":188,"path":189,"stem":190},"Handling Forms with Class-Based Views","/class-based-views/handling-forms-with-class-based-views","05.class-based-views/06.handling-forms-with-class-based-views",{"title":192,"path":193,"stem":194},"Using Mixins","/class-based-views/using-mixins","05.class-based-views/07.using-mixins",{"title":196,"path":197,"stem":198},"URL Configuration with Class-Based Views","/class-based-views/url-configuration-with-class-based-views","05.class-based-views/08.url-configuration-with-class-based-views",{"title":200,"path":201,"stem":202},"Subclassing Generic Views","/class-based-views/subclassing-generic-views","05.class-based-views/09.subclassing-generic-views",{"title":204,"path":205,"stem":206},"Asynchronous Class-Based Views","/class-based-views/asynchronous-class-based-views","05.class-based-views/10.asynchronous-class-based-views",{"title":208,"path":209,"stem":210},"Pagination","/class-based-views/pagination","05.class-based-views/11.pagination",{"title":212,"path":213,"stem":214,"children":215},"Forms and User Input","/forms-and-user-input","06.forms-and-user-input/01.index",[216,217,221,225,229,233,237,241,245,249],{"title":212,"path":213,"stem":214},{"title":218,"path":219,"stem":220},"Understanding HTML Forms","/forms-and-user-input/understanding-html-forms","06.forms-and-user-input/02.understanding-html-forms",{"title":222,"path":223,"stem":224},"Django's Role in Form Handling","/forms-and-user-input/djangos-role-in-form-handling","06.forms-and-user-input/03.djangos-role-in-form-handling",{"title":226,"path":227,"stem":228},"Creating Forms with Forms API","/forms-and-user-input/creating-forms-with-forms-api","06.forms-and-user-input/04.creating-forms-with-forms-api",{"title":230,"path":231,"stem":232},"Form Validation","/forms-and-user-input/form-validation","06.forms-and-user-input/05.form-validation",{"title":234,"path":235,"stem":236},"Built-in Fields and Widgets","/forms-and-user-input/built-in-fields-and-widgets","06.forms-and-user-input/06.built-in-fields-and-widgets",{"title":238,"path":239,"stem":240},"Form Rendering in Templates","/forms-and-user-input/form-rendering-in-templates","06.forms-and-user-input/07.form-rendering-in-templates",{"title":242,"path":243,"stem":244},"Model Forms","/forms-and-user-input/model-forms","06.forms-and-user-input/08.model-forms",{"title":246,"path":247,"stem":248},"Advanced Form Techniques","/forms-and-user-input/advanced-form-techniques","06.forms-and-user-input/09.advanced-form-techniques",{"title":250,"path":251,"stem":252},"Security Considerations for Forms","/forms-and-user-input/security-considerations-for-forms","06.forms-and-user-input/10.security-considerations-for-forms",{"title":254,"path":255,"stem":256,"children":257},"Models and Databases","/models-and-databases","07.models-and-databases/01.index",[258,259,263,267,271,275,279,283,287,291,295,299,303,307,311,315,319,323,327],{"title":254,"path":255,"stem":256},{"title":260,"path":261,"stem":262},"Understanding Django Models","/models-and-databases/understanding-django-models","07.models-and-databases/02.understanding-django-models",{"title":264,"path":265,"stem":266},"Defining Fields","/models-and-databases/defining-fields","07.models-and-databases/03.defining-fields",{"title":268,"path":269,"stem":270},"Relationships and Foreign Keys","/models-and-databases/relationships-and-foreign-keys","07.models-and-databases/04.relationships-and-foreign-keys",{"title":272,"path":273,"stem":274},"Examples of Relationship Patterns","/models-and-databases/examples-of-relationship-patterns","07.models-and-databases/05.examples-of-relationship-patterns",{"title":276,"path":277,"stem":278},"Making Queries","/models-and-databases/making-queries","07.models-and-databases/06.making-queries",{"title":280,"path":281,"stem":282},"Filtering, Ordering, and Slicing","/models-and-databases/filtering-ordering-slicing","07.models-and-databases/07.filtering-ordering-slicing",{"title":284,"path":285,"stem":286},"Managers and QuerySets","/models-and-databases/managers-and-querysets","07.models-and-databases/08.managers-and-querysets",{"title":288,"path":289,"stem":290},"Aggregation","/models-and-databases/aggregation","07.models-and-databases/09.aggregation",{"title":292,"path":293,"stem":294},"Search","/models-and-databases/search","07.models-and-databases/10.search",{"title":296,"path":297,"stem":298},"Raw SQL Queries","/models-and-databases/raw-sql-queries","07.models-and-databases/11.raw-sql-queries",{"title":300,"path":301,"stem":302},"Transactions","/models-and-databases/transactions","07.models-and-databases/12.transactions",{"title":304,"path":305,"stem":306},"Multiple Databases","/models-and-databases/multiple-databases","07.models-and-databases/13.multiple-databases",{"title":308,"path":309,"stem":310},"Tablespaces","/models-and-databases/tablespaces","07.models-and-databases/14.tablespaces",{"title":312,"path":313,"stem":314},"Composite Primary Keys","/models-and-databases/composite-primary-keys","07.models-and-databases/15.composite-primary-keys",{"title":316,"path":317,"stem":318},"Database Instrumentation","/models-and-databases/database-instrumentation","07.models-and-databases/16.database-instrumentation",{"title":320,"path":321,"stem":322},"Database Optimization","/models-and-databases/database-optimization","07.models-and-databases/17.database-optimization",{"title":324,"path":325,"stem":326},"Fixtures","/models-and-databases/fixtures","07.models-and-databases/18.fixtures",{"title":328,"path":329,"stem":330},"Signals","/models-and-databases/signals","07.models-and-databases/19.signals",{"title":332,"path":333,"stem":334,"children":335},"Migrations","/migrations","08.migrations/01.index",[336,337,341,345,349,353,357,361,365,369,373,377,381,385],{"title":332,"path":333,"stem":334},{"title":338,"path":339,"stem":340},"How Migrations Work","/migrations/how-migrations-work","08.migrations/02.how-migrations-work",{"title":342,"path":343,"stem":344},"Management Commands","/migrations/management-commands","08.migrations/03.management-commands",{"title":346,"path":347,"stem":348},"Dependencies and Workflow","/migrations/dependencies-and-workflow","08.migrations/04.dependencies-and-workflow",{"title":350,"path":351,"stem":352},"Transaction Handling","/migrations/transaction-handling","08.migrations/05.transaction-handling",{"title":354,"path":355,"stem":356},"Adding Migrations to Apps","/migrations/adding-migrations-to-apps","08.migrations/06.adding-migrations-to-apps",{"title":358,"path":359,"stem":360},"Reversing Migrations","/migrations/reversing-migrations","08.migrations/07.reversing-migrations",{"title":362,"path":363,"stem":364},"Historical Models","/migrations/historical-models","08.migrations/08.historical-models",{"title":366,"path":367,"stem":368},"Considerations When Removing Fields","/migrations/considerations-when-removing-fields","08.migrations/09.considerations-when-removing-fields",{"title":370,"path":371,"stem":372},"Data Migrations","/migrations/data-migrations","08.migrations/10.data-migrations",{"title":374,"path":375,"stem":376},"Squashing Migrations","/migrations/squashing-migrations","08.migrations/11.squashing-migrations",{"title":378,"path":379,"stem":380},"Serializing Values","/migrations/serializing-values","08.migrations/12.serializing-values",{"title":382,"path":383,"stem":384},"Supporting Multiple Django Versions","/migrations/supporting-multiple-django-versions","08.migrations/13.supporting-multiple-django-versions",{"title":386,"path":387,"stem":388},"Django Serialization Framework","/migrations/django-serialization-framework","08.migrations/14.django-serialization-framework",{"title":390,"path":391,"stem":392,"children":393},"Authentication and Authorization","/authentication-and-authorization","09.authentication-and-authorization/01.index",[394,395,399,403,407,411,415,419,423,427,431,435],{"title":390,"path":391,"stem":392},{"title":396,"path":397,"stem":398},"Overview of Django's Authentication System","/authentication-and-authorization/overview-of-django-authentication-system","09.authentication-and-authorization/02.overview-of-django-authentication-system",{"title":400,"path":401,"stem":402},"Users and Groups","/authentication-and-authorization/users-and-groups","09.authentication-and-authorization/03.users-and-groups",{"title":404,"path":405,"stem":406},"Permissions","/authentication-and-authorization/permissions","09.authentication-and-authorization/04.permissions",{"title":408,"path":409,"stem":410},"Password Management","/authentication-and-authorization/password-management","09.authentication-and-authorization/05.password-management",{"title":412,"path":413,"stem":414},"Authentication Views","/authentication-and-authorization/authentication-views","09.authentication-and-authorization/06.authentication-views",{"title":416,"path":417,"stem":418},"Login and Logout","/authentication-and-authorization/login-and-logout","09.authentication-and-authorization/07.login-and-logout",{"title":420,"path":421,"stem":422},"Custom User Models","/authentication-and-authorization/custom-user-models","09.authentication-and-authorization/08.custom-user-models",{"title":424,"path":425,"stem":426},"Middleware for Authentication","/authentication-and-authorization/middleware-for-authentication","09.authentication-and-authorization/09.middleware-for-authentication",{"title":428,"path":429,"stem":430},"Authorization in Views and Templates","/authentication-and-authorization/authorization-in-views-and-templates","09.authentication-and-authorization/10.authorization-in-views-and-templates",{"title":432,"path":433,"stem":434},"Integrating Social Authentication","/authentication-and-authorization/integrating-social-authentication","09.authentication-and-authorization/11.integrating-social-authentication",{"title":436,"path":437,"stem":438},"Security Best Practices","/authentication-and-authorization/security-best-practices","09.authentication-and-authorization/12.security-best-practices",{"title":440,"path":441,"stem":442,"children":443},"Sessions, Cookies, and State","/sessions-cookies-state","10.sessions-cookies-state/01.index",[444,446,450,454,458],{"title":445,"path":441,"stem":442},"Sessions, Cookies, and State Management",{"title":447,"path":448,"stem":449},"Introduction to Sessions","/sessions-cookies-state/introduction-to-sessions","10.sessions-cookies-state/02.introduction-to-sessions",{"title":451,"path":452,"stem":453},"Working with Cookies","/sessions-cookies-state/working-with-cookies","10.sessions-cookies-state/03.working-with-cookies",{"title":455,"path":456,"stem":457},"Server-Side Session Storage Options","/sessions-cookies-state/server-side-session-storage-options","10.sessions-cookies-state/04.server-side-session-storage-options",{"title":459,"path":460,"stem":461},"Session Security","/sessions-cookies-state/session-security","10.sessions-cookies-state/05.session-security",{"title":463,"path":464,"stem":465,"children":466},"Working with Files","/working-with-files","11.working-with-files/01.index",[467,468,472,476,480,484],{"title":463,"path":464,"stem":465},{"title":469,"path":470,"stem":471},"Files in Models","/working-with-files/files-in-models","11.working-with-files/02.files-in-models",{"title":473,"path":474,"stem":475},"The File Object","/working-with-files/the-file-object","11.working-with-files/03.the-file-object",{"title":477,"path":478,"stem":479},"Storage Backends","/working-with-files/storage-backends","11.working-with-files/04.storage-backends",{"title":481,"path":482,"stem":483},"Using Cloud Storage Providers","/working-with-files/using-cloud-storage-providers","11.working-with-files/05.using-cloud-storage-providers",{"title":485,"path":486,"stem":487},"Managing Media in Production","/working-with-files/managing-media-in-production","11.working-with-files/06.managing-media-in-production",{"title":489,"path":490,"stem":491,"children":492},"Admin Site","/admin-site","12.admin-site/01.index",[493,494,498,502,506,510],{"title":489,"path":490,"stem":491},{"title":495,"path":496,"stem":497},"Enabling the Admin","/admin-site/enabling-the-admin","12.admin-site/02.enabling-the-admin",{"title":499,"path":500,"stem":501},"Registering Models","/admin-site/registering-models","12.admin-site/03.registering-models",{"title":503,"path":504,"stem":505},"Customizing Admin Display","/admin-site/customizing-admin-display","12.admin-site/04.customizing-admin-display",{"title":507,"path":508,"stem":509},"Admin Actions","/admin-site/admin-actions","12.admin-site/05.admin-actions",{"title":511,"path":512,"stem":513},"Admin Security Best Practices","/admin-site/admin-security-best-practices","12.admin-site/06.admin-security-best-practices",{"title":515,"path":516,"stem":517,"children":518},"Middleware","/middleware","13.middleware/01.index",[519,520,524,528,532,536],{"title":515,"path":516,"stem":517},{"title":521,"path":522,"stem":523},"Middleware Overview","/middleware/middleware-overview","13.middleware/02.middleware-overview",{"title":525,"path":526,"stem":527},"Built-in Middleware","/middleware/built-in-middleware","13.middleware/03.built-in-middleware",{"title":529,"path":530,"stem":531},"Creating Custom Middleware","/middleware/creating-custom-middleware","13.middleware/04.creating-custom-middleware",{"title":533,"path":534,"stem":535},"Middleware Ordering","/middleware/middleware-ordering","13.middleware/05.middleware-ordering",{"title":537,"path":538,"stem":539},"Performance and Debugging","/middleware/performance-and-debugging","13.middleware/06.performance-and-debugging",{"title":541,"path":542,"stem":543,"children":544},"Security","/security","14.security/01.index",[545,546,550,554,558,562,566,570,574],{"title":541,"path":542,"stem":543},{"title":547,"path":548,"stem":549},"Django Security Philosophy","/security/django-security-philosophy","14.security/02.django-security-philosophy",{"title":551,"path":552,"stem":553},"Cross Site Request Forgery","/security/cross-site-request-forgery","14.security/03.cross-site-request-forgery",{"title":555,"path":556,"stem":557},"Cross Site Scripting","/security/cross-site-scripting","14.security/04.cross-site-scripting",{"title":559,"path":560,"stem":561},"SQL Injection Protection","/security/sql-injection-protection","14.security/05.sql-injection-protection",{"title":563,"path":564,"stem":565},"Clickjacking Protection","/security/clickjacking-protection","14.security/06.clickjacking-protection",{"title":567,"path":568,"stem":569},"HTTPS Setup and HSTS","/security/https-setup-and-hsts","14.security/07.https-setup-and-hsts",{"title":571,"path":572,"stem":573},"Password Storage and Cryptography","/security/password-storage-and-cryptography","14.security/08.password-storage-and-cryptography",{"title":575,"path":576,"stem":577},"Secure Deployment Checklist","/security/secure-deployment-checklist","14.security/09.secure-deployment-checklist",{"title":579,"path":580,"stem":581,"children":582},"Testing","/testing","15.testing/01.index",[583,584,588,592,596,600,604,608,612,616,620],{"title":579,"path":580,"stem":581},{"title":585,"path":586,"stem":587},"Introduction to Django Testing","/testing/introduction-to-django-testing","15.testing/02.introduction-to-django-testing",{"title":589,"path":590,"stem":591},"Writing and Running Tests","/testing/writing-and-running-tests","15.testing/03.writing-and-running-tests",{"title":593,"path":594,"stem":595},"Test Tools","/testing/test-tools","15.testing/04.test-tools",{"title":597,"path":598,"stem":599},"Testing Models","/testing/testing-models","15.testing/05.testing-models",{"title":601,"path":602,"stem":603},"Testing Views","/testing/testing-views","15.testing/06.testing-views",{"title":605,"path":606,"stem":607},"Testing Forms","/testing/testing-forms","15.testing/07.testing-forms",{"title":609,"path":610,"stem":611},"Testing Templates","/testing/testing-templates","15.testing/08.testing-templates",{"title":613,"path":614,"stem":615},"Testing Authentication","/testing/testing-authentication","15.testing/09.testing-authentication",{"title":617,"path":618,"stem":619},"Advanced Testing Topics","/testing/advanced-testing-topics","15.testing/10.advanced-testing-topics",{"title":621,"path":622,"stem":623},"Performance Testing","/testing/performance-testing","15.testing/11.performance-testing",{"title":625,"path":626,"stem":627,"children":628},"Static Assets and Frontend Integration","/static-assets-and-frontend-integration","16.static-assets-and-frontend-integration/01.index",[629,630,634,638,642,646],{"title":625,"path":626,"stem":627},{"title":631,"path":632,"stem":633},"Working with Static Files","/static-assets-and-frontend-integration/working-with-static-files","16.static-assets-and-frontend-integration/02.working-with-static-files",{"title":635,"path":636,"stem":637},"Integrating CSS and JavaScript","/static-assets-and-frontend-integration/integrating-css-and-javascript","16.static-assets-and-frontend-integration/03.integrating-css-and-javascript",{"title":639,"path":640,"stem":641},"Using Build Tools like Vite or Webpack","/static-assets-and-frontend-integration/using-build-tools-like-vite-or-webpack","16.static-assets-and-frontend-integration/04.using-build-tools-like-vite-or-webpack",{"title":643,"path":644,"stem":645},"Using React or Vue with Django","/static-assets-and-frontend-integration/using-react-or-vue-with-django","16.static-assets-and-frontend-integration/05.using-react-or-vue-with-django",{"title":647,"path":648,"stem":649},"Managing CORS","/static-assets-and-frontend-integration/managing-cors","16.static-assets-and-frontend-integration/06.managing-cors",{"title":651,"path":652,"stem":653,"children":654},"Internationalization and Localization","/internationalization-and-localization","17.internationalization-and-localization/01.index",[655,656,660,664,668],{"title":651,"path":652,"stem":653},{"title":657,"path":658,"stem":659},"Enabling Translation","/internationalization-and-localization/enabling-translation","17.internationalization-and-localization/02.enabling-translation",{"title":661,"path":662,"stem":663},"Translating Text in Code and Templates","/internationalization-and-localization/translating-text-in-code-and-templates","17.internationalization-and-localization/03.translating-text-in-code-and-templates",{"title":665,"path":666,"stem":667},"Timezone Support","/internationalization-and-localization/timezone-support","17.internationalization-and-localization/04.timezone-support",{"title":669,"path":670,"stem":671},"Locale Middleware","/internationalization-and-localization/locale-middleware","17.internationalization-and-localization/05.locale-middleware",{"title":673,"path":674,"stem":675,"children":676},"Caching","/caching","18.caching/01.index",[677,678,682,686,690,694,698],{"title":673,"path":674,"stem":675},{"title":679,"path":680,"stem":681},"Introduction to Caching","/caching/introduction-to-caching","18.caching/02.introduction-to-caching",{"title":683,"path":684,"stem":685},"Cache Backends","/caching/cache-backends","18.caching/03.cache-backends",{"title":687,"path":688,"stem":689},"Per View Caching","/caching/per-view-caching","18.caching/04.per-view-caching",{"title":691,"path":692,"stem":693},"Low Level Cache API","/caching/low-level-cache-api","18.caching/05.low-level-cache-api",{"title":695,"path":696,"stem":697},"Template Fragment Caching","/caching/template-fragment-caching","18.caching/06.template-fragment-caching",{"title":699,"path":700,"stem":701},"Deployment Level Caching Patterns","/caching/deployment-level-caching-patterns","18.caching/07.deployment-level-caching-patterns",{"title":703,"path":704,"stem":705,"children":706},"Asynchronous Django","/asynchronous-django","19.asynchronous-django/01.index",[707,708,712,716,720,724,728,732],{"title":703,"path":704,"stem":705},{"title":709,"path":710,"stem":711},"Introduction to ASGI","/asynchronous-django/introduction-to-asgi","19.asynchronous-django/02.introduction-to-asgi",{"title":713,"path":714,"stem":715},"Async Views","/asynchronous-django/async-views","19.asynchronous-django/03.async-views",{"title":717,"path":718,"stem":719},"Async ORM Status","/asynchronous-django/async-orm-status","19.asynchronous-django/04.async-orm-status",{"title":721,"path":722,"stem":723},"WebSockets with Channels","/asynchronous-django/websockets-with-channels","19.asynchronous-django/05.websockets-with-channels",{"title":725,"path":726,"stem":727},"Background Tasks with Celery or RQ","/asynchronous-django/background-tasks-with-celery-or-rq","19.asynchronous-django/06.background-tasks-with-celery-or-rq",{"title":729,"path":730,"stem":731},"Asynchronous Support","/asynchronous-django/asynchronous-support","19.asynchronous-django/07.asynchronous-support",{"title":733,"path":734,"stem":735},"Django's Tasks Framework","/asynchronous-django/django-tasks-framework","19.asynchronous-django/08.django-tasks-framework",{"title":737,"path":738,"stem":739,"children":740},"Deployment","/deployment","20.deployment/01.index",[741,742,746,750,754,758,762,766,770],{"title":737,"path":738,"stem":739},{"title":743,"path":744,"stem":745},"Preparing for Production","/deployment/preparing-for-production","20.deployment/02.preparing-for-production",{"title":747,"path":748,"stem":749},"Using WSGI and ASGI Servers","/deployment/using-wsgi-and-asgi-servers","20.deployment/03.using-wsgi-and-asgi-servers",{"title":751,"path":752,"stem":753},"Deploying on Linux Servers","/deployment/deploying-on-linux-servers","20.deployment/04.deploying-on-linux-servers",{"title":755,"path":756,"stem":757},"Using Docker","/deployment/using-docker","20.deployment/05.using-docker",{"title":759,"path":760,"stem":761},"Cloud Deployment Guides","/deployment/cloud-deployment-guides","20.deployment/06.cloud-deployment-guides",{"title":763,"path":764,"stem":765},"Scaling and Load Balancing","/deployment/scaling-and-load-balancing","20.deployment/07.scaling-and-load-balancing",{"title":767,"path":768,"stem":769},"Monitoring and Logging","/deployment/monitoring-and-logging","20.deployment/08.monitoring-and-logging",{"title":771,"path":772,"stem":773},"Backup Strategies","/deployment/backup-strategies","20.deployment/09.backup-strategies",{"title":775,"path":776,"stem":777,"children":778},"Performance and Optimization","/performance-and-optimization","21.performance-and-optimization/01.index",[779,780,784,788,792,796],{"title":775,"path":776,"stem":777},{"title":781,"path":782,"stem":783},"Query Optimization","/performance-and-optimization/query-optimization","21.performance-and-optimization/02.query-optimization",{"title":785,"path":786,"stem":787},"Template Rendering Optimization","/performance-and-optimization/template-rendering-optimization","21.performance-and-optimization/03.template-rendering-optimization",{"title":789,"path":790,"stem":791},"Using Select Related and Prefetch Related","/performance-and-optimization/using-select-related-and-prefetch-related","21.performance-and-optimization/04.using-select-related-and-prefetch-related",{"title":793,"path":794,"stem":795},"Caching Strategies","/performance-and-optimization/caching-strategies","21.performance-and-optimization/05.caching-strategies",{"title":797,"path":798,"stem":799},"Profiling Django Apps","/performance-and-optimization/profiling-django-apps","21.performance-and-optimization/06.profiling-django-apps",{"title":801,"path":802,"stem":803,"children":804},"Advanced and Expert Topics","/advanced-and-expert-topics","22.advanced-and-expert-topics/01.index",[805,806,810,814,818,822,826,830,834,838,842,846],{"title":801,"path":802,"stem":803},{"title":807,"path":808,"stem":809},"System Architecture Patterns","/advanced-and-expert-topics/system-architecture-patterns","22.advanced-and-expert-topics/02.system-architecture-patterns",{"title":811,"path":812,"stem":813},"Domain Driven Design with Django","/advanced-and-expert-topics/domain-driven-design-with-django","22.advanced-and-expert-topics/03.domain-driven-design-with-django",{"title":815,"path":816,"stem":817},"Building Large Scale Django Projects","/advanced-and-expert-topics/building-large-scale-django-projects","22.advanced-and-expert-topics/04.building-large-scale-django-projects",{"title":819,"path":820,"stem":821},"Plugin Architectures for Django Apps","/advanced-and-expert-topics/plugin-architectures-for-django-apps","22.advanced-and-expert-topics/05.plugin-architectures-for-django-apps",{"title":823,"path":824,"stem":825},"Extending Django's Core","/advanced-and-expert-topics/extending-djangos-core","22.advanced-and-expert-topics/06.extending-djangos-core",{"title":827,"path":828,"stem":829},"Custom ORM Expressions","/advanced-and-expert-topics/custom-orm-expressions","22.advanced-and-expert-topics/07.custom-orm-expressions",{"title":831,"path":832,"stem":833},"Custom Management Commands","/advanced-and-expert-topics/custom-management-commands","22.advanced-and-expert-topics/08.custom-management-commands",{"title":835,"path":836,"stem":837},"Working with Signals","/advanced-and-expert-topics/working-with-signals","22.advanced-and-expert-topics/09.working-with-signals",{"title":839,"path":840,"stem":841},"Building Reusable Django Packages","/advanced-and-expert-topics/building-reusable-django-packages","22.advanced-and-expert-topics/10.building-reusable-django-packages",{"title":843,"path":844,"stem":845},"Integrating Microservices","/advanced-and-expert-topics/integrating-microservices","22.advanced-and-expert-topics/11.integrating-microservices",{"title":847,"path":848,"stem":849},"Advanced Security Hardening","/advanced-and-expert-topics/advanced-security-hardening","22.advanced-and-expert-topics/12.advanced-security-hardening",{"title":851,"path":852,"stem":853,"children":854},"Logging in Django","/logging-in-django","23.logging-in-django/01.index",[855],{"title":851,"path":852,"stem":853},{"title":857,"path":858,"stem":859,"children":860},"FAQ and Troubleshooting","/faq-and-troubleshooting","24.faq-and-troubleshooting/01.index",[861],{"title":857,"path":858,"stem":859},{"title":863,"path":864,"stem":865,"children":866},"External Packages and Ecosystem","/external-packages-and-ecosystem","25.external-packages-and-ecosystem/01.index",[867],{"title":863,"path":864,"stem":865},{"title":869,"path":870,"stem":871,"children":872},"Django Internals and Contributing","/django-internals-and-contributing","26.django-internals-and-contributing/01.index",[873],{"title":869,"path":870,"stem":871},{"title":875,"path":876,"stem":877,"children":878},"Microservices with Django","/microservices-with-django","27.microservices-with-django/01.index",[879,880,884,888,892,896,900,904,908,912,916,920,924],{"title":875,"path":876,"stem":877},{"title":881,"path":882,"stem":883},"What Is a Microservice?","/microservices-with-django/what-is-a-microservice","27.microservices-with-django/02.what-is-a-microservice",{"title":885,"path":886,"stem":887},"Introducing the Django Microservices Architecture","/microservices-with-django/django-microservices-architecture","27.microservices-with-django/03.django-microservices-architecture",{"title":889,"path":890,"stem":891},"Setting Up the Development and Runtime Environment","/microservices-with-django/development-environment","27.microservices-with-django/04.development-environment",{"title":893,"path":894,"stem":895},"Cloud-native Data Processing with MongoDB","/microservices-with-django/cloud-native-data-processing","27.microservices-with-django/05.cloud-native-data-processing",{"title":897,"path":898,"stem":899},"Creating RESTful APIs for Microservices","/microservices-with-django/restful-apis","27.microservices-with-django/06.restful-apis",{"title":901,"path":902,"stem":903},"Orchestrating Microservices with Celery and RabbitMQ","/microservices-with-django/orchestrating-celery-rabbitmq","27.microservices-with-django/07.orchestrating-celery-rabbitmq",{"title":905,"path":906,"stem":907},"Testing Microservices","/microservices-with-django/testing-microservices","27.microservices-with-django/08.testing-microservices",{"title":909,"path":910,"stem":911},"Deploying Microservices","/microservices-with-django/deploying-microservices","27.microservices-with-django/09.deploying-microservices",{"title":913,"path":914,"stem":915},"Securing Microservices","/microservices-with-django/securing-microservices","27.microservices-with-django/10.securing-microservices",{"title":917,"path":918,"stem":919},"Improving Microservices Performance with Caching","/microservices-with-django/performance-caching","27.microservices-with-django/11.performance-caching",{"title":921,"path":922,"stem":923},"Best Practices","/microservices-with-django/best-practices","27.microservices-with-django/12.best-practices",{"title":925,"path":926,"stem":927},"Transforming a Monolithic Web App into a Microservice version","/microservices-with-django/monolith-to-microservices","27.microservices-with-django/13.monolith-to-microservices",{"title":929,"path":930,"stem":931,"children":932},"Releases","/releases","releases",[933,936,940,944,948,952,956,960,964,968,972,976,980,984,988,992,996,1000,1004,1008,1012],{"title":934,"path":930,"stem":935},"Django Releases","releases/index",{"title":937,"path":938,"stem":939},"Django 5.1.10 release notes","/releases/5.1.10","releases/5.1.10",{"title":941,"path":942,"stem":943},"Django 5.1.11 release notes","/releases/5.1.11","releases/5.1.11",{"title":945,"path":946,"stem":947},"Django 5.1.12 release notes","/releases/5.1.12","releases/5.1.12",{"title":949,"path":950,"stem":951},"Django 5.1.13 release notes","/releases/5.1.13","releases/5.1.13",{"title":953,"path":954,"stem":955},"Django 5.1.14 release notes","/releases/5.1.14","releases/5.1.14",{"title":957,"path":958,"stem":959},"Django 5.1.15 release notes","/releases/5.1.15","releases/5.1.15",{"title":961,"path":962,"stem":963},"Django 5.2 release notes","/releases/5.2","releases/5.2",{"title":965,"path":966,"stem":967},"Django 5.2.1 release notes","/releases/5.2.1","releases/5.2.1",{"title":969,"path":970,"stem":971},"Django 5.2.10 release notes","/releases/5.2.10","releases/5.2.10",{"title":973,"path":974,"stem":975},"Django 5.2.2 release notes","/releases/5.2.2","releases/5.2.2",{"title":977,"path":978,"stem":979},"Django 5.2.3 release notes","/releases/5.2.3","releases/5.2.3",{"title":981,"path":982,"stem":983},"Django 5.2.4 release notes","/releases/5.2.4","releases/5.2.4",{"title":985,"path":986,"stem":987},"Django 5.2.5 release notes","/releases/5.2.5","releases/5.2.5",{"title":989,"path":990,"stem":991},"Django 5.2.6 release notes","/releases/5.2.6","releases/5.2.6",{"title":993,"path":994,"stem":995},"Django 5.2.7 release notes","/releases/5.2.7","releases/5.2.7",{"title":997,"path":998,"stem":999},"Django 5.2.8 release notes","/releases/5.2.8","releases/5.2.8",{"title":1001,"path":1002,"stem":1003},"Django 5.2.9 release notes","/releases/5.2.9","releases/5.2.9",{"title":1005,"path":1006,"stem":1007},"Django 6.0 release notes","/releases/6.0","releases/6.0",{"title":1009,"path":1010,"stem":1011},"Django 6.0.1 release notes","/releases/6.0.1","releases/6.0.1",{"title":1013,"path":1014,"stem":1015},"Django 6.1 release notes - UNDER DEVELOPMENT","/releases/6.1","releases/6.1",{"id":1017,"title":300,"body":1018,"description":1028,"extension":10552,"links":10553,"meta":10554,"navigation":1153,"path":301,"seo":10555,"stem":302,"__hash__":10556},"docs/07.models-and-databases/12.transactions.md",{"type":1019,"value":1020,"toc":10531},"minimark",[1021,1025,1029,1034,1039,2268,2272,2276,3439,3443,4409,4413,4417,5435,5439,5443,6728,6732,6736,8388,8392,8396,10524,10527],[1022,1023,300],"h1",{"id":1024},"transactions",[1026,1027,1028],"p",{},"Database transactions ensure data consistency and integrity by grouping multiple database operations into atomic units. Django provides comprehensive transaction management tools that help you maintain data consistency even in complex scenarios.",[1030,1031,1033],"h2",{"id":1032},"understanding-transactions","Understanding Transactions",[1035,1036,1038],"h3",{"id":1037},"acid-properties-and-django","ACID Properties and Django",[1040,1041,1046],"pre",{"className":1042,"code":1043,"language":1044,"meta":1045,"style":1045},"language-python shiki shiki-themes material-theme-lighter vitesse-light vitesse-dark","# Transaction basics in Django\nfrom django.db import transaction\nfrom django.db.models import F\nfrom myapp.models import Account, Transaction as TransactionModel, Product, Order, OrderItem\n\n# Atomic operations - all succeed or all fail\n@transaction.atomic\ndef transfer_money(from_account_id, to_account_id, amount):\n    \"\"\"Transfer money between accounts atomically\"\"\"\n    \n    # Get accounts with select_for_update to prevent race conditions\n    from_account = Account.objects.select_for_update().get(id=from_account_id)\n    to_account = Account.objects.select_for_update().get(id=to_account_id)\n    \n    # Validate sufficient funds\n    if from_account.balance \u003C amount:\n        raise ValueError(\"Insufficient funds\")\n    \n    # Perform the transfer\n    from_account.balance = F('balance') - amount\n    to_account.balance = F('balance') + amount\n    \n    from_account.save(update_fields=['balance'])\n    to_account.save(update_fields=['balance'])\n    \n    # Create transaction records\n    TransactionModel.objects.create(\n        account=from_account,\n        amount=-amount,\n        transaction_type='transfer_out',\n        description=f'Transfer to account {to_account_id}'\n    )\n    \n    TransactionModel.objects.create(\n        account=to_account,\n        amount=amount,\n        transaction_type='transfer_in',\n        description=f'Transfer from account {from_account_id}'\n    )\n    \n    return True\n\n# Context manager approach\ndef create_order_with_items(customer, items_data):\n    \"\"\"Create order with items in a transaction\"\"\"\n    \n    with transaction.atomic():\n        # Create the order\n        order = Order.objects.create(\n            customer=customer,\n            status='pending',\n            total_amount=0\n        )\n        \n        total_amount = 0\n        \n        for item_data in items_data:\n            product = Product.objects.select_for_update().get(\n                id=item_data['product_id']\n            )\n            \n            # Check stock availability\n            if product.stock_quantity \u003C item_data['quantity']:\n                raise ValueError(f\"Insufficient stock for {product.name}\")\n            \n            # Create order item\n            order_item = OrderItem.objects.create(\n                order=order,\n                product=product,\n                quantity=item_data['quantity'],\n                unit_price=product.price\n            )\n            \n            # Update stock\n            product.stock_quantity = F('stock_quantity') - item_data['quantity']\n            product.save(update_fields=['stock_quantity'])\n            \n            total_amount += order_item.quantity * order_item.unit_price\n        \n        # Update order total\n        order.total_amount = total_amount\n        order.save(update_fields=['total_amount'])\n        \n        return order\n","python","",[1047,1048,1049,1058,1082,1104,1148,1155,1161,1176,1206,1220,1226,1232,1274,1307,1312,1318,1341,1365,1370,1376,1410,1439,1444,1471,1494,1499,1505,1523,1537,1553,1570,1596,1602,1607,1622,1634,1645,1661,1681,1686,1691,1701,1706,1712,1732,1742,1747,1764,1770,1790,1802,1819,1831,1837,1843,1854,1859,1875,1899,1923,1929,1935,1941,1972,2003,2008,2014,2035,2048,2060,2081,2096,2101,2106,2112,2150,2173,2178,2204,2209,2215,2231,2254,2259],"code",{"__ignoreMap":1045},[1050,1051,1054],"span",{"class":1052,"line":1053},"line",1,[1050,1055,1057],{"class":1056},"s9Tkl","# Transaction basics in Django\n",[1050,1059,1061,1065,1069,1073,1076,1079],{"class":1052,"line":1060},2,[1050,1062,1064],{"class":1063},"siDh9","from",[1050,1066,1068],{"class":1067},"sftqT"," django",[1050,1070,1072],{"class":1071},"soVBu",".",[1050,1074,1075],{"class":1067},"db ",[1050,1077,1078],{"class":1063},"import",[1050,1080,1081],{"class":1067}," transaction\n",[1050,1083,1085,1087,1089,1091,1094,1096,1099,1101],{"class":1052,"line":1084},3,[1050,1086,1064],{"class":1063},[1050,1088,1068],{"class":1067},[1050,1090,1072],{"class":1071},[1050,1092,1093],{"class":1067},"db",[1050,1095,1072],{"class":1071},[1050,1097,1098],{"class":1067},"models ",[1050,1100,1078],{"class":1063},[1050,1102,1103],{"class":1067}," F\n",[1050,1105,1107,1109,1112,1114,1116,1118,1121,1124,1127,1130,1133,1135,1138,1140,1143,1145],{"class":1052,"line":1106},4,[1050,1108,1064],{"class":1063},[1050,1110,1111],{"class":1067}," myapp",[1050,1113,1072],{"class":1071},[1050,1115,1098],{"class":1067},[1050,1117,1078],{"class":1063},[1050,1119,1120],{"class":1067}," Account",[1050,1122,1123],{"class":1071},",",[1050,1125,1126],{"class":1067}," Transaction ",[1050,1128,1129],{"class":1063},"as",[1050,1131,1132],{"class":1067}," TransactionModel",[1050,1134,1123],{"class":1071},[1050,1136,1137],{"class":1067}," Product",[1050,1139,1123],{"class":1071},[1050,1141,1142],{"class":1067}," Order",[1050,1144,1123],{"class":1071},[1050,1146,1147],{"class":1067}," OrderItem\n",[1050,1149,1151],{"class":1052,"line":1150},5,[1050,1152,1154],{"emptyLinePlaceholder":1153},true,"\n",[1050,1156,1158],{"class":1052,"line":1157},6,[1050,1159,1160],{"class":1056},"# Atomic operations - all succeed or all fail\n",[1050,1162,1164,1167,1171,1173],{"class":1052,"line":1163},7,[1050,1165,1166],{"class":1071},"@",[1050,1168,1170],{"class":1169},"sljsM","transaction",[1050,1172,1072],{"class":1071},[1050,1174,1175],{"class":1169},"atomic\n",[1050,1177,1179,1183,1186,1189,1193,1195,1198,1200,1203],{"class":1052,"line":1178},8,[1050,1180,1182],{"class":1181},"s5Kfy","def",[1050,1184,1185],{"class":1169}," transfer_money",[1050,1187,1188],{"class":1071},"(",[1050,1190,1192],{"class":1191},"sCyAa","from_account_id",[1050,1194,1123],{"class":1071},[1050,1196,1197],{"class":1191}," to_account_id",[1050,1199,1123],{"class":1071},[1050,1201,1202],{"class":1191}," amount",[1050,1204,1205],{"class":1071},"):\n",[1050,1207,1209,1213,1217],{"class":1052,"line":1208},9,[1050,1210,1212],{"class":1211},"sm7ve","    \"\"\"",[1050,1214,1216],{"class":1215},"sVyVU","Transfer money between accounts atomically",[1050,1218,1219],{"class":1211},"\"\"\"\n",[1050,1221,1223],{"class":1052,"line":1222},10,[1050,1224,1225],{"class":1067},"    \n",[1050,1227,1229],{"class":1052,"line":1228},11,[1050,1230,1231],{"class":1056},"    # Get accounts with select_for_update to prevent race conditions\n",[1050,1233,1235,1238,1241,1243,1245,1249,1251,1255,1258,1261,1263,1267,1269,1271],{"class":1052,"line":1234},12,[1050,1236,1237],{"class":1067},"    from_account ",[1050,1239,1240],{"class":1071},"=",[1050,1242,1120],{"class":1067},[1050,1244,1072],{"class":1071},[1050,1246,1248],{"class":1247},"sBPpx","objects",[1050,1250,1072],{"class":1071},[1050,1252,1254],{"class":1253},"siWMO","select_for_update",[1050,1256,1257],{"class":1071},"().",[1050,1259,1260],{"class":1253},"get",[1050,1262,1188],{"class":1071},[1050,1264,1266],{"class":1265},"sqOPj","id",[1050,1268,1240],{"class":1071},[1050,1270,1192],{"class":1253},[1050,1272,1273],{"class":1071},")\n",[1050,1275,1277,1280,1282,1284,1286,1288,1290,1292,1294,1296,1298,1300,1302,1305],{"class":1052,"line":1276},13,[1050,1278,1279],{"class":1067},"    to_account ",[1050,1281,1240],{"class":1071},[1050,1283,1120],{"class":1067},[1050,1285,1072],{"class":1071},[1050,1287,1248],{"class":1247},[1050,1289,1072],{"class":1071},[1050,1291,1254],{"class":1253},[1050,1293,1257],{"class":1071},[1050,1295,1260],{"class":1253},[1050,1297,1188],{"class":1071},[1050,1299,1266],{"class":1265},[1050,1301,1240],{"class":1071},[1050,1303,1304],{"class":1253},"to_account_id",[1050,1306,1273],{"class":1071},[1050,1308,1310],{"class":1052,"line":1309},14,[1050,1311,1225],{"class":1067},[1050,1313,1315],{"class":1052,"line":1314},15,[1050,1316,1317],{"class":1056},"    # Validate sufficient funds\n",[1050,1319,1321,1324,1327,1329,1332,1336,1338],{"class":1052,"line":1320},16,[1050,1322,1323],{"class":1063},"    if",[1050,1325,1326],{"class":1067}," from_account",[1050,1328,1072],{"class":1071},[1050,1330,1331],{"class":1247},"balance",[1050,1333,1335],{"class":1334},"sVsLi"," \u003C",[1050,1337,1202],{"class":1067},[1050,1339,1340],{"class":1071},":\n",[1050,1342,1344,1347,1351,1353,1357,1361,1363],{"class":1052,"line":1343},17,[1050,1345,1346],{"class":1063},"        raise",[1050,1348,1350],{"class":1349},"sa2tF"," ValueError",[1050,1352,1188],{"class":1071},[1050,1354,1356],{"class":1355},"sbYkP","\"",[1050,1358,1360],{"class":1359},"sTbE_","Insufficient funds",[1050,1362,1356],{"class":1355},[1050,1364,1273],{"class":1071},[1050,1366,1368],{"class":1052,"line":1367},18,[1050,1369,1225],{"class":1067},[1050,1371,1373],{"class":1052,"line":1372},19,[1050,1374,1375],{"class":1056},"    # Perform the transfer\n",[1050,1377,1379,1382,1384,1386,1389,1392,1394,1397,1399,1401,1404,1407],{"class":1052,"line":1378},20,[1050,1380,1381],{"class":1067},"    from_account",[1050,1383,1072],{"class":1071},[1050,1385,1331],{"class":1247},[1050,1387,1388],{"class":1071}," =",[1050,1390,1391],{"class":1253}," F",[1050,1393,1188],{"class":1071},[1050,1395,1396],{"class":1355},"'",[1050,1398,1331],{"class":1359},[1050,1400,1396],{"class":1355},[1050,1402,1403],{"class":1071},")",[1050,1405,1406],{"class":1334}," -",[1050,1408,1409],{"class":1067}," amount\n",[1050,1411,1413,1416,1418,1420,1422,1424,1426,1428,1430,1432,1434,1437],{"class":1052,"line":1412},21,[1050,1414,1415],{"class":1067},"    to_account",[1050,1417,1072],{"class":1071},[1050,1419,1331],{"class":1247},[1050,1421,1388],{"class":1071},[1050,1423,1391],{"class":1253},[1050,1425,1188],{"class":1071},[1050,1427,1396],{"class":1355},[1050,1429,1331],{"class":1359},[1050,1431,1396],{"class":1355},[1050,1433,1403],{"class":1071},[1050,1435,1436],{"class":1334}," +",[1050,1438,1409],{"class":1067},[1050,1440,1442],{"class":1052,"line":1441},22,[1050,1443,1225],{"class":1067},[1050,1445,1447,1449,1451,1454,1456,1459,1462,1464,1466,1468],{"class":1052,"line":1446},23,[1050,1448,1381],{"class":1067},[1050,1450,1072],{"class":1071},[1050,1452,1453],{"class":1253},"save",[1050,1455,1188],{"class":1071},[1050,1457,1458],{"class":1265},"update_fields",[1050,1460,1461],{"class":1071},"=[",[1050,1463,1396],{"class":1355},[1050,1465,1331],{"class":1359},[1050,1467,1396],{"class":1355},[1050,1469,1470],{"class":1071},"])\n",[1050,1472,1474,1476,1478,1480,1482,1484,1486,1488,1490,1492],{"class":1052,"line":1473},24,[1050,1475,1415],{"class":1067},[1050,1477,1072],{"class":1071},[1050,1479,1453],{"class":1253},[1050,1481,1188],{"class":1071},[1050,1483,1458],{"class":1265},[1050,1485,1461],{"class":1071},[1050,1487,1396],{"class":1355},[1050,1489,1331],{"class":1359},[1050,1491,1396],{"class":1355},[1050,1493,1470],{"class":1071},[1050,1495,1497],{"class":1052,"line":1496},25,[1050,1498,1225],{"class":1067},[1050,1500,1502],{"class":1052,"line":1501},26,[1050,1503,1504],{"class":1056},"    # Create transaction records\n",[1050,1506,1508,1511,1513,1515,1517,1520],{"class":1052,"line":1507},27,[1050,1509,1510],{"class":1067},"    TransactionModel",[1050,1512,1072],{"class":1071},[1050,1514,1248],{"class":1247},[1050,1516,1072],{"class":1071},[1050,1518,1519],{"class":1253},"create",[1050,1521,1522],{"class":1071},"(\n",[1050,1524,1526,1529,1531,1534],{"class":1052,"line":1525},28,[1050,1527,1528],{"class":1265},"        account",[1050,1530,1240],{"class":1071},[1050,1532,1533],{"class":1253},"from_account",[1050,1535,1536],{"class":1071},",\n",[1050,1538,1540,1543,1545,1548,1551],{"class":1052,"line":1539},29,[1050,1541,1542],{"class":1265},"        amount",[1050,1544,1240],{"class":1071},[1050,1546,1547],{"class":1334},"-",[1050,1549,1550],{"class":1253},"amount",[1050,1552,1536],{"class":1071},[1050,1554,1556,1559,1561,1563,1566,1568],{"class":1052,"line":1555},30,[1050,1557,1558],{"class":1265},"        transaction_type",[1050,1560,1240],{"class":1071},[1050,1562,1396],{"class":1355},[1050,1564,1565],{"class":1359},"transfer_out",[1050,1567,1396],{"class":1355},[1050,1569,1536],{"class":1071},[1050,1571,1573,1576,1578,1581,1584,1588,1590,1593],{"class":1052,"line":1572},31,[1050,1574,1575],{"class":1265},"        description",[1050,1577,1240],{"class":1071},[1050,1579,1580],{"class":1181},"f",[1050,1582,1583],{"class":1359},"'Transfer to account ",[1050,1585,1587],{"class":1586},"s3h35","{",[1050,1589,1304],{"class":1253},[1050,1591,1592],{"class":1586},"}",[1050,1594,1595],{"class":1359},"'\n",[1050,1597,1599],{"class":1052,"line":1598},32,[1050,1600,1601],{"class":1071},"    )\n",[1050,1603,1605],{"class":1052,"line":1604},33,[1050,1606,1225],{"class":1067},[1050,1608,1610,1612,1614,1616,1618,1620],{"class":1052,"line":1609},34,[1050,1611,1510],{"class":1067},[1050,1613,1072],{"class":1071},[1050,1615,1248],{"class":1247},[1050,1617,1072],{"class":1071},[1050,1619,1519],{"class":1253},[1050,1621,1522],{"class":1071},[1050,1623,1625,1627,1629,1632],{"class":1052,"line":1624},35,[1050,1626,1528],{"class":1265},[1050,1628,1240],{"class":1071},[1050,1630,1631],{"class":1253},"to_account",[1050,1633,1536],{"class":1071},[1050,1635,1637,1639,1641,1643],{"class":1052,"line":1636},36,[1050,1638,1542],{"class":1265},[1050,1640,1240],{"class":1071},[1050,1642,1550],{"class":1253},[1050,1644,1536],{"class":1071},[1050,1646,1648,1650,1652,1654,1657,1659],{"class":1052,"line":1647},37,[1050,1649,1558],{"class":1265},[1050,1651,1240],{"class":1071},[1050,1653,1396],{"class":1355},[1050,1655,1656],{"class":1359},"transfer_in",[1050,1658,1396],{"class":1355},[1050,1660,1536],{"class":1071},[1050,1662,1664,1666,1668,1670,1673,1675,1677,1679],{"class":1052,"line":1663},38,[1050,1665,1575],{"class":1265},[1050,1667,1240],{"class":1071},[1050,1669,1580],{"class":1181},[1050,1671,1672],{"class":1359},"'Transfer from account ",[1050,1674,1587],{"class":1586},[1050,1676,1192],{"class":1253},[1050,1678,1592],{"class":1586},[1050,1680,1595],{"class":1359},[1050,1682,1684],{"class":1052,"line":1683},39,[1050,1685,1601],{"class":1071},[1050,1687,1689],{"class":1052,"line":1688},40,[1050,1690,1225],{"class":1067},[1050,1692,1694,1697],{"class":1052,"line":1693},41,[1050,1695,1696],{"class":1063},"    return",[1050,1698,1700],{"class":1699},"s8XtY"," True\n",[1050,1702,1704],{"class":1052,"line":1703},42,[1050,1705,1154],{"emptyLinePlaceholder":1153},[1050,1707,1709],{"class":1052,"line":1708},43,[1050,1710,1711],{"class":1056},"# Context manager approach\n",[1050,1713,1715,1717,1720,1722,1725,1727,1730],{"class":1052,"line":1714},44,[1050,1716,1182],{"class":1181},[1050,1718,1719],{"class":1169}," create_order_with_items",[1050,1721,1188],{"class":1071},[1050,1723,1724],{"class":1191},"customer",[1050,1726,1123],{"class":1071},[1050,1728,1729],{"class":1191}," items_data",[1050,1731,1205],{"class":1071},[1050,1733,1735,1737,1740],{"class":1052,"line":1734},45,[1050,1736,1212],{"class":1211},[1050,1738,1739],{"class":1215},"Create order with items in a transaction",[1050,1741,1219],{"class":1211},[1050,1743,1745],{"class":1052,"line":1744},46,[1050,1746,1225],{"class":1067},[1050,1748,1750,1753,1756,1758,1761],{"class":1052,"line":1749},47,[1050,1751,1752],{"class":1063},"    with",[1050,1754,1755],{"class":1067}," transaction",[1050,1757,1072],{"class":1071},[1050,1759,1760],{"class":1253},"atomic",[1050,1762,1763],{"class":1071},"():\n",[1050,1765,1767],{"class":1052,"line":1766},48,[1050,1768,1769],{"class":1056},"        # Create the order\n",[1050,1771,1773,1776,1778,1780,1782,1784,1786,1788],{"class":1052,"line":1772},49,[1050,1774,1775],{"class":1067},"        order ",[1050,1777,1240],{"class":1071},[1050,1779,1142],{"class":1067},[1050,1781,1072],{"class":1071},[1050,1783,1248],{"class":1247},[1050,1785,1072],{"class":1071},[1050,1787,1519],{"class":1253},[1050,1789,1522],{"class":1071},[1050,1791,1793,1796,1798,1800],{"class":1052,"line":1792},50,[1050,1794,1795],{"class":1265},"            customer",[1050,1797,1240],{"class":1071},[1050,1799,1724],{"class":1253},[1050,1801,1536],{"class":1071},[1050,1803,1805,1808,1810,1812,1815,1817],{"class":1052,"line":1804},51,[1050,1806,1807],{"class":1265},"            status",[1050,1809,1240],{"class":1071},[1050,1811,1396],{"class":1355},[1050,1813,1814],{"class":1359},"pending",[1050,1816,1396],{"class":1355},[1050,1818,1536],{"class":1071},[1050,1820,1822,1825,1827],{"class":1052,"line":1821},52,[1050,1823,1824],{"class":1265},"            total_amount",[1050,1826,1240],{"class":1071},[1050,1828,1830],{"class":1829},"s7CZa","0\n",[1050,1832,1834],{"class":1052,"line":1833},53,[1050,1835,1836],{"class":1071},"        )\n",[1050,1838,1840],{"class":1052,"line":1839},54,[1050,1841,1842],{"class":1067},"        \n",[1050,1844,1846,1849,1851],{"class":1052,"line":1845},55,[1050,1847,1848],{"class":1067},"        total_amount ",[1050,1850,1240],{"class":1071},[1050,1852,1853],{"class":1829}," 0\n",[1050,1855,1857],{"class":1052,"line":1856},56,[1050,1858,1842],{"class":1067},[1050,1860,1862,1865,1868,1871,1873],{"class":1052,"line":1861},57,[1050,1863,1864],{"class":1063},"        for",[1050,1866,1867],{"class":1067}," item_data ",[1050,1869,1870],{"class":1063},"in",[1050,1872,1729],{"class":1067},[1050,1874,1340],{"class":1071},[1050,1876,1878,1881,1883,1885,1887,1889,1891,1893,1895,1897],{"class":1052,"line":1877},58,[1050,1879,1880],{"class":1067},"            product ",[1050,1882,1240],{"class":1071},[1050,1884,1137],{"class":1067},[1050,1886,1072],{"class":1071},[1050,1888,1248],{"class":1247},[1050,1890,1072],{"class":1071},[1050,1892,1254],{"class":1253},[1050,1894,1257],{"class":1071},[1050,1896,1260],{"class":1253},[1050,1898,1522],{"class":1071},[1050,1900,1902,1905,1907,1910,1913,1915,1918,1920],{"class":1052,"line":1901},59,[1050,1903,1904],{"class":1265},"                id",[1050,1906,1240],{"class":1071},[1050,1908,1909],{"class":1253},"item_data",[1050,1911,1912],{"class":1071},"[",[1050,1914,1396],{"class":1355},[1050,1916,1917],{"class":1359},"product_id",[1050,1919,1396],{"class":1355},[1050,1921,1922],{"class":1071},"]\n",[1050,1924,1926],{"class":1052,"line":1925},60,[1050,1927,1928],{"class":1071},"            )\n",[1050,1930,1932],{"class":1052,"line":1931},61,[1050,1933,1934],{"class":1067},"            \n",[1050,1936,1938],{"class":1052,"line":1937},62,[1050,1939,1940],{"class":1056},"            # Check stock availability\n",[1050,1942,1944,1947,1950,1952,1955,1957,1960,1962,1964,1967,1969],{"class":1052,"line":1943},63,[1050,1945,1946],{"class":1063},"            if",[1050,1948,1949],{"class":1067}," product",[1050,1951,1072],{"class":1071},[1050,1953,1954],{"class":1247},"stock_quantity",[1050,1956,1335],{"class":1334},[1050,1958,1959],{"class":1067}," item_data",[1050,1961,1912],{"class":1071},[1050,1963,1396],{"class":1355},[1050,1965,1966],{"class":1359},"quantity",[1050,1968,1396],{"class":1355},[1050,1970,1971],{"class":1071},"]:\n",[1050,1973,1975,1978,1980,1982,1984,1987,1989,1992,1994,1997,1999,2001],{"class":1052,"line":1974},64,[1050,1976,1977],{"class":1063},"                raise",[1050,1979,1350],{"class":1349},[1050,1981,1188],{"class":1071},[1050,1983,1580],{"class":1181},[1050,1985,1986],{"class":1359},"\"Insufficient stock for ",[1050,1988,1587],{"class":1586},[1050,1990,1991],{"class":1253},"product",[1050,1993,1072],{"class":1071},[1050,1995,1996],{"class":1247},"name",[1050,1998,1592],{"class":1586},[1050,2000,1356],{"class":1359},[1050,2002,1273],{"class":1071},[1050,2004,2006],{"class":1052,"line":2005},65,[1050,2007,1934],{"class":1067},[1050,2009,2011],{"class":1052,"line":2010},66,[1050,2012,2013],{"class":1056},"            # Create order item\n",[1050,2015,2017,2020,2022,2025,2027,2029,2031,2033],{"class":1052,"line":2016},67,[1050,2018,2019],{"class":1067},"            order_item ",[1050,2021,1240],{"class":1071},[1050,2023,2024],{"class":1067}," OrderItem",[1050,2026,1072],{"class":1071},[1050,2028,1248],{"class":1247},[1050,2030,1072],{"class":1071},[1050,2032,1519],{"class":1253},[1050,2034,1522],{"class":1071},[1050,2036,2038,2041,2043,2046],{"class":1052,"line":2037},68,[1050,2039,2040],{"class":1265},"                order",[1050,2042,1240],{"class":1071},[1050,2044,2045],{"class":1253},"order",[1050,2047,1536],{"class":1071},[1050,2049,2051,2054,2056,2058],{"class":1052,"line":2050},69,[1050,2052,2053],{"class":1265},"                product",[1050,2055,1240],{"class":1071},[1050,2057,1991],{"class":1253},[1050,2059,1536],{"class":1071},[1050,2061,2063,2066,2068,2070,2072,2074,2076,2078],{"class":1052,"line":2062},70,[1050,2064,2065],{"class":1265},"                quantity",[1050,2067,1240],{"class":1071},[1050,2069,1909],{"class":1253},[1050,2071,1912],{"class":1071},[1050,2073,1396],{"class":1355},[1050,2075,1966],{"class":1359},[1050,2077,1396],{"class":1355},[1050,2079,2080],{"class":1071},"],\n",[1050,2082,2084,2087,2089,2091,2093],{"class":1052,"line":2083},71,[1050,2085,2086],{"class":1265},"                unit_price",[1050,2088,1240],{"class":1071},[1050,2090,1991],{"class":1253},[1050,2092,1072],{"class":1071},[1050,2094,2095],{"class":1247},"price\n",[1050,2097,2099],{"class":1052,"line":2098},72,[1050,2100,1928],{"class":1071},[1050,2102,2104],{"class":1052,"line":2103},73,[1050,2105,1934],{"class":1067},[1050,2107,2109],{"class":1052,"line":2108},74,[1050,2110,2111],{"class":1056},"            # Update stock\n",[1050,2113,2115,2118,2120,2122,2124,2126,2128,2130,2132,2134,2136,2138,2140,2142,2144,2146,2148],{"class":1052,"line":2114},75,[1050,2116,2117],{"class":1067},"            product",[1050,2119,1072],{"class":1071},[1050,2121,1954],{"class":1247},[1050,2123,1388],{"class":1071},[1050,2125,1391],{"class":1253},[1050,2127,1188],{"class":1071},[1050,2129,1396],{"class":1355},[1050,2131,1954],{"class":1359},[1050,2133,1396],{"class":1355},[1050,2135,1403],{"class":1071},[1050,2137,1406],{"class":1334},[1050,2139,1959],{"class":1067},[1050,2141,1912],{"class":1071},[1050,2143,1396],{"class":1355},[1050,2145,1966],{"class":1359},[1050,2147,1396],{"class":1355},[1050,2149,1922],{"class":1071},[1050,2151,2153,2155,2157,2159,2161,2163,2165,2167,2169,2171],{"class":1052,"line":2152},76,[1050,2154,2117],{"class":1067},[1050,2156,1072],{"class":1071},[1050,2158,1453],{"class":1253},[1050,2160,1188],{"class":1071},[1050,2162,1458],{"class":1265},[1050,2164,1461],{"class":1071},[1050,2166,1396],{"class":1355},[1050,2168,1954],{"class":1359},[1050,2170,1396],{"class":1355},[1050,2172,1470],{"class":1071},[1050,2174,2176],{"class":1052,"line":2175},77,[1050,2177,1934],{"class":1067},[1050,2179,2181,2184,2187,2190,2192,2194,2197,2199,2201],{"class":1052,"line":2180},78,[1050,2182,2183],{"class":1067},"            total_amount ",[1050,2185,2186],{"class":1071},"+=",[1050,2188,2189],{"class":1067}," order_item",[1050,2191,1072],{"class":1071},[1050,2193,1966],{"class":1247},[1050,2195,2196],{"class":1334}," *",[1050,2198,2189],{"class":1067},[1050,2200,1072],{"class":1071},[1050,2202,2203],{"class":1247},"unit_price\n",[1050,2205,2207],{"class":1052,"line":2206},79,[1050,2208,1842],{"class":1067},[1050,2210,2212],{"class":1052,"line":2211},80,[1050,2213,2214],{"class":1056},"        # Update order total\n",[1050,2216,2218,2221,2223,2226,2228],{"class":1052,"line":2217},81,[1050,2219,2220],{"class":1067},"        order",[1050,2222,1072],{"class":1071},[1050,2224,2225],{"class":1247},"total_amount",[1050,2227,1388],{"class":1071},[1050,2229,2230],{"class":1067}," total_amount\n",[1050,2232,2234,2236,2238,2240,2242,2244,2246,2248,2250,2252],{"class":1052,"line":2233},82,[1050,2235,2220],{"class":1067},[1050,2237,1072],{"class":1071},[1050,2239,1453],{"class":1253},[1050,2241,1188],{"class":1071},[1050,2243,1458],{"class":1265},[1050,2245,1461],{"class":1071},[1050,2247,1396],{"class":1355},[1050,2249,2225],{"class":1359},[1050,2251,1396],{"class":1355},[1050,2253,1470],{"class":1071},[1050,2255,2257],{"class":1052,"line":2256},83,[1050,2258,1842],{"class":1067},[1050,2260,2262,2265],{"class":1052,"line":2261},84,[1050,2263,2264],{"class":1063},"        return",[1050,2266,2267],{"class":1067}," order\n",[1030,2269,2271],{"id":2270},"transaction-decorators-and-context-managers","Transaction Decorators and Context Managers",[1035,2273,2275],{"id":2274},"atomic-decorator","Atomic Decorator",[1040,2277,2279],{"className":1042,"code":2278,"language":1044,"meta":1045,"style":1045},"from django.db import transaction\nfrom django.http import JsonResponse\nfrom django.views.decorators.http import require_http_methods\n\n@transaction.atomic\n@require_http_methods([\"POST\"])\ndef process_payment(request):\n    \"\"\"Process payment with automatic transaction management\"\"\"\n    \n    payment_data = json.loads(request.body)\n    \n    try:\n        # Create payment record\n        payment = Payment.objects.create(\n            user=request.user,\n            amount=payment_data['amount'],\n            payment_method=payment_data['method'],\n            status='processing'\n        )\n        \n        # Process with external payment gateway\n        gateway_response = process_with_gateway(payment_data)\n        \n        if gateway_response['success']:\n            payment.status = 'completed'\n            payment.gateway_transaction_id = gateway_response['transaction_id']\n            payment.save()\n            \n            # Update user account\n            user_account = Account.objects.select_for_update().get(user=request.user)\n            user_account.balance = F('balance') + payment_data['amount']\n            user_account.save()\n            \n            return JsonResponse({'success': True, 'payment_id': payment.id})\n        else:\n            payment.status = 'failed'\n            payment.error_message = gateway_response['error']\n            payment.save()\n            \n            return JsonResponse({'success': False, 'error': gateway_response['error']})\n            \n    except Exception as e:\n        # Transaction will be rolled back automatically\n        return JsonResponse({'success': False, 'error': str(e)})\n\n# Class-based view with atomic decorator\nfrom django.views.generic import CreateView\n\nclass AtomicOrderCreateView(CreateView):\n    model = Order\n    \n    @transaction.atomic\n    def form_valid(self, form):\n        \"\"\"Override form_valid to add transaction management\"\"\"\n        \n        # Create the order\n        self.object = form.save(commit=False)\n        self.object.customer = self.request.user\n        self.object.save()\n        \n        # Process cart items\n        cart_items = CartItem.objects.filter(user=self.request.user)\n        \n        for cart_item in cart_items:\n            # Check stock\n            if cart_item.product.stock_quantity \u003C cart_item.quantity:\n                raise ValueError(f\"Insufficient stock for {cart_item.product.name}\")\n            \n            # Create order item\n            OrderItem.objects.create(\n                order=self.object,\n                product=cart_item.product,\n                quantity=cart_item.quantity,\n                unit_price=cart_item.product.price\n            )\n            \n            # Update stock\n            cart_item.product.stock_quantity = F('stock_quantity') - cart_item.quantity\n            cart_item.product.save()\n        \n        # Clear cart\n        cart_items.delete()\n        \n        return super().form_valid(form)\n",[1047,2280,2281,2295,2311,2336,2340,2350,2369,2383,2392,2396,2422,2426,2433,2438,2458,2474,2494,2514,2527,2531,2535,2540,2556,2560,2579,2599,2623,2634,2638,2643,2678,2716,2726,2730,2774,2781,2798,2822,2832,2836,2878,2882,2898,2903,2942,2946,2951,2971,2975,2992,3002,3006,3017,3038,3048,3052,3056,3087,3113,3127,3131,3136,3173,3177,3191,3196,3221,3252,3256,3260,3275,3289,3303,3317,3333,3337,3341,3345,3381,3395,3399,3404,3416,3420],{"__ignoreMap":1045},[1050,2282,2283,2285,2287,2289,2291,2293],{"class":1052,"line":1053},[1050,2284,1064],{"class":1063},[1050,2286,1068],{"class":1067},[1050,2288,1072],{"class":1071},[1050,2290,1075],{"class":1067},[1050,2292,1078],{"class":1063},[1050,2294,1081],{"class":1067},[1050,2296,2297,2299,2301,2303,2306,2308],{"class":1052,"line":1060},[1050,2298,1064],{"class":1063},[1050,2300,1068],{"class":1067},[1050,2302,1072],{"class":1071},[1050,2304,2305],{"class":1067},"http ",[1050,2307,1078],{"class":1063},[1050,2309,2310],{"class":1067}," JsonResponse\n",[1050,2312,2313,2315,2317,2319,2322,2324,2327,2329,2331,2333],{"class":1052,"line":1084},[1050,2314,1064],{"class":1063},[1050,2316,1068],{"class":1067},[1050,2318,1072],{"class":1071},[1050,2320,2321],{"class":1067},"views",[1050,2323,1072],{"class":1071},[1050,2325,2326],{"class":1067},"decorators",[1050,2328,1072],{"class":1071},[1050,2330,2305],{"class":1067},[1050,2332,1078],{"class":1063},[1050,2334,2335],{"class":1067}," require_http_methods\n",[1050,2337,2338],{"class":1052,"line":1106},[1050,2339,1154],{"emptyLinePlaceholder":1153},[1050,2341,2342,2344,2346,2348],{"class":1052,"line":1150},[1050,2343,1166],{"class":1071},[1050,2345,1170],{"class":1169},[1050,2347,1072],{"class":1071},[1050,2349,1175],{"class":1169},[1050,2351,2352,2354,2357,2360,2362,2365,2367],{"class":1052,"line":1157},[1050,2353,1166],{"class":1071},[1050,2355,2356],{"class":1169},"require_http_methods",[1050,2358,2359],{"class":1071},"([",[1050,2361,1356],{"class":1355},[1050,2363,2364],{"class":1359},"POST",[1050,2366,1356],{"class":1355},[1050,2368,1470],{"class":1071},[1050,2370,2371,2373,2376,2378,2381],{"class":1052,"line":1163},[1050,2372,1182],{"class":1181},[1050,2374,2375],{"class":1169}," process_payment",[1050,2377,1188],{"class":1071},[1050,2379,2380],{"class":1191},"request",[1050,2382,1205],{"class":1071},[1050,2384,2385,2387,2390],{"class":1052,"line":1178},[1050,2386,1212],{"class":1211},[1050,2388,2389],{"class":1215},"Process payment with automatic transaction management",[1050,2391,1219],{"class":1211},[1050,2393,2394],{"class":1052,"line":1208},[1050,2395,1225],{"class":1067},[1050,2397,2398,2401,2403,2406,2408,2411,2413,2415,2417,2420],{"class":1052,"line":1222},[1050,2399,2400],{"class":1067},"    payment_data ",[1050,2402,1240],{"class":1071},[1050,2404,2405],{"class":1067}," json",[1050,2407,1072],{"class":1071},[1050,2409,2410],{"class":1253},"loads",[1050,2412,1188],{"class":1071},[1050,2414,2380],{"class":1253},[1050,2416,1072],{"class":1071},[1050,2418,2419],{"class":1247},"body",[1050,2421,1273],{"class":1071},[1050,2423,2424],{"class":1052,"line":1228},[1050,2425,1225],{"class":1067},[1050,2427,2428,2431],{"class":1052,"line":1234},[1050,2429,2430],{"class":1063},"    try",[1050,2432,1340],{"class":1071},[1050,2434,2435],{"class":1052,"line":1276},[1050,2436,2437],{"class":1056},"        # Create payment record\n",[1050,2439,2440,2443,2445,2448,2450,2452,2454,2456],{"class":1052,"line":1309},[1050,2441,2442],{"class":1067},"        payment ",[1050,2444,1240],{"class":1071},[1050,2446,2447],{"class":1067}," Payment",[1050,2449,1072],{"class":1071},[1050,2451,1248],{"class":1247},[1050,2453,1072],{"class":1071},[1050,2455,1519],{"class":1253},[1050,2457,1522],{"class":1071},[1050,2459,2460,2463,2465,2467,2469,2472],{"class":1052,"line":1314},[1050,2461,2462],{"class":1265},"            user",[1050,2464,1240],{"class":1071},[1050,2466,2380],{"class":1253},[1050,2468,1072],{"class":1071},[1050,2470,2471],{"class":1247},"user",[1050,2473,1536],{"class":1071},[1050,2475,2476,2479,2481,2484,2486,2488,2490,2492],{"class":1052,"line":1320},[1050,2477,2478],{"class":1265},"            amount",[1050,2480,1240],{"class":1071},[1050,2482,2483],{"class":1253},"payment_data",[1050,2485,1912],{"class":1071},[1050,2487,1396],{"class":1355},[1050,2489,1550],{"class":1359},[1050,2491,1396],{"class":1355},[1050,2493,2080],{"class":1071},[1050,2495,2496,2499,2501,2503,2505,2507,2510,2512],{"class":1052,"line":1343},[1050,2497,2498],{"class":1265},"            payment_method",[1050,2500,1240],{"class":1071},[1050,2502,2483],{"class":1253},[1050,2504,1912],{"class":1071},[1050,2506,1396],{"class":1355},[1050,2508,2509],{"class":1359},"method",[1050,2511,1396],{"class":1355},[1050,2513,2080],{"class":1071},[1050,2515,2516,2518,2520,2522,2525],{"class":1052,"line":1367},[1050,2517,1807],{"class":1265},[1050,2519,1240],{"class":1071},[1050,2521,1396],{"class":1355},[1050,2523,2524],{"class":1359},"processing",[1050,2526,1595],{"class":1355},[1050,2528,2529],{"class":1052,"line":1372},[1050,2530,1836],{"class":1071},[1050,2532,2533],{"class":1052,"line":1378},[1050,2534,1842],{"class":1067},[1050,2536,2537],{"class":1052,"line":1412},[1050,2538,2539],{"class":1056},"        # Process with external payment gateway\n",[1050,2541,2542,2545,2547,2550,2552,2554],{"class":1052,"line":1441},[1050,2543,2544],{"class":1067},"        gateway_response ",[1050,2546,1240],{"class":1071},[1050,2548,2549],{"class":1253}," process_with_gateway",[1050,2551,1188],{"class":1071},[1050,2553,2483],{"class":1253},[1050,2555,1273],{"class":1071},[1050,2557,2558],{"class":1052,"line":1446},[1050,2559,1842],{"class":1067},[1050,2561,2562,2565,2568,2570,2572,2575,2577],{"class":1052,"line":1473},[1050,2563,2564],{"class":1063},"        if",[1050,2566,2567],{"class":1067}," gateway_response",[1050,2569,1912],{"class":1071},[1050,2571,1396],{"class":1355},[1050,2573,2574],{"class":1359},"success",[1050,2576,1396],{"class":1355},[1050,2578,1971],{"class":1071},[1050,2580,2581,2584,2586,2589,2591,2594,2597],{"class":1052,"line":1496},[1050,2582,2583],{"class":1067},"            payment",[1050,2585,1072],{"class":1071},[1050,2587,2588],{"class":1247},"status",[1050,2590,1388],{"class":1071},[1050,2592,2593],{"class":1355}," '",[1050,2595,2596],{"class":1359},"completed",[1050,2598,1595],{"class":1355},[1050,2600,2601,2603,2605,2608,2610,2612,2614,2616,2619,2621],{"class":1052,"line":1501},[1050,2602,2583],{"class":1067},[1050,2604,1072],{"class":1071},[1050,2606,2607],{"class":1247},"gateway_transaction_id",[1050,2609,1388],{"class":1071},[1050,2611,2567],{"class":1067},[1050,2613,1912],{"class":1071},[1050,2615,1396],{"class":1355},[1050,2617,2618],{"class":1359},"transaction_id",[1050,2620,1396],{"class":1355},[1050,2622,1922],{"class":1071},[1050,2624,2625,2627,2629,2631],{"class":1052,"line":1507},[1050,2626,2583],{"class":1067},[1050,2628,1072],{"class":1071},[1050,2630,1453],{"class":1253},[1050,2632,2633],{"class":1071},"()\n",[1050,2635,2636],{"class":1052,"line":1525},[1050,2637,1934],{"class":1067},[1050,2639,2640],{"class":1052,"line":1539},[1050,2641,2642],{"class":1056},"            # Update user account\n",[1050,2644,2645,2648,2650,2652,2654,2656,2658,2660,2662,2664,2666,2668,2670,2672,2674,2676],{"class":1052,"line":1555},[1050,2646,2647],{"class":1067},"            user_account ",[1050,2649,1240],{"class":1071},[1050,2651,1120],{"class":1067},[1050,2653,1072],{"class":1071},[1050,2655,1248],{"class":1247},[1050,2657,1072],{"class":1071},[1050,2659,1254],{"class":1253},[1050,2661,1257],{"class":1071},[1050,2663,1260],{"class":1253},[1050,2665,1188],{"class":1071},[1050,2667,2471],{"class":1265},[1050,2669,1240],{"class":1071},[1050,2671,2380],{"class":1253},[1050,2673,1072],{"class":1071},[1050,2675,2471],{"class":1247},[1050,2677,1273],{"class":1071},[1050,2679,2680,2683,2685,2687,2689,2691,2693,2695,2697,2699,2701,2703,2706,2708,2710,2712,2714],{"class":1052,"line":1572},[1050,2681,2682],{"class":1067},"            user_account",[1050,2684,1072],{"class":1071},[1050,2686,1331],{"class":1247},[1050,2688,1388],{"class":1071},[1050,2690,1391],{"class":1253},[1050,2692,1188],{"class":1071},[1050,2694,1396],{"class":1355},[1050,2696,1331],{"class":1359},[1050,2698,1396],{"class":1355},[1050,2700,1403],{"class":1071},[1050,2702,1436],{"class":1334},[1050,2704,2705],{"class":1067}," payment_data",[1050,2707,1912],{"class":1071},[1050,2709,1396],{"class":1355},[1050,2711,1550],{"class":1359},[1050,2713,1396],{"class":1355},[1050,2715,1922],{"class":1071},[1050,2717,2718,2720,2722,2724],{"class":1052,"line":1598},[1050,2719,2682],{"class":1067},[1050,2721,1072],{"class":1071},[1050,2723,1453],{"class":1253},[1050,2725,2633],{"class":1071},[1050,2727,2728],{"class":1052,"line":1604},[1050,2729,1934],{"class":1067},[1050,2731,2732,2735,2738,2741,2743,2745,2747,2750,2753,2755,2757,2760,2762,2764,2767,2769,2771],{"class":1052,"line":1609},[1050,2733,2734],{"class":1063},"            return",[1050,2736,2737],{"class":1253}," JsonResponse",[1050,2739,2740],{"class":1071},"({",[1050,2742,1396],{"class":1355},[1050,2744,2574],{"class":1359},[1050,2746,1396],{"class":1355},[1050,2748,2749],{"class":1071},":",[1050,2751,2752],{"class":1699}," True",[1050,2754,1123],{"class":1071},[1050,2756,2593],{"class":1355},[1050,2758,2759],{"class":1359},"payment_id",[1050,2761,1396],{"class":1355},[1050,2763,2749],{"class":1071},[1050,2765,2766],{"class":1253}," payment",[1050,2768,1072],{"class":1071},[1050,2770,1266],{"class":1247},[1050,2772,2773],{"class":1071},"})\n",[1050,2775,2776,2779],{"class":1052,"line":1624},[1050,2777,2778],{"class":1063},"        else",[1050,2780,1340],{"class":1071},[1050,2782,2783,2785,2787,2789,2791,2793,2796],{"class":1052,"line":1636},[1050,2784,2583],{"class":1067},[1050,2786,1072],{"class":1071},[1050,2788,2588],{"class":1247},[1050,2790,1388],{"class":1071},[1050,2792,2593],{"class":1355},[1050,2794,2795],{"class":1359},"failed",[1050,2797,1595],{"class":1355},[1050,2799,2800,2802,2804,2807,2809,2811,2813,2815,2818,2820],{"class":1052,"line":1647},[1050,2801,2583],{"class":1067},[1050,2803,1072],{"class":1071},[1050,2805,2806],{"class":1247},"error_message",[1050,2808,1388],{"class":1071},[1050,2810,2567],{"class":1067},[1050,2812,1912],{"class":1071},[1050,2814,1396],{"class":1355},[1050,2816,2817],{"class":1359},"error",[1050,2819,1396],{"class":1355},[1050,2821,1922],{"class":1071},[1050,2823,2824,2826,2828,2830],{"class":1052,"line":1663},[1050,2825,2583],{"class":1067},[1050,2827,1072],{"class":1071},[1050,2829,1453],{"class":1253},[1050,2831,2633],{"class":1071},[1050,2833,2834],{"class":1052,"line":1683},[1050,2835,1934],{"class":1067},[1050,2837,2838,2840,2842,2844,2846,2848,2850,2852,2855,2857,2859,2861,2863,2865,2867,2869,2871,2873,2875],{"class":1052,"line":1688},[1050,2839,2734],{"class":1063},[1050,2841,2737],{"class":1253},[1050,2843,2740],{"class":1071},[1050,2845,1396],{"class":1355},[1050,2847,2574],{"class":1359},[1050,2849,1396],{"class":1355},[1050,2851,2749],{"class":1071},[1050,2853,2854],{"class":1699}," False",[1050,2856,1123],{"class":1071},[1050,2858,2593],{"class":1355},[1050,2860,2817],{"class":1359},[1050,2862,1396],{"class":1355},[1050,2864,2749],{"class":1071},[1050,2866,2567],{"class":1253},[1050,2868,1912],{"class":1071},[1050,2870,1396],{"class":1355},[1050,2872,2817],{"class":1359},[1050,2874,1396],{"class":1355},[1050,2876,2877],{"class":1071},"]})\n",[1050,2879,2880],{"class":1052,"line":1693},[1050,2881,1934],{"class":1067},[1050,2883,2884,2887,2890,2893,2896],{"class":1052,"line":1703},[1050,2885,2886],{"class":1063},"    except",[1050,2888,2889],{"class":1349}," Exception",[1050,2891,2892],{"class":1063}," as",[1050,2894,2895],{"class":1067}," e",[1050,2897,1340],{"class":1071},[1050,2899,2900],{"class":1052,"line":1708},[1050,2901,2902],{"class":1056},"        # Transaction will be rolled back automatically\n",[1050,2904,2905,2907,2909,2911,2913,2915,2917,2919,2921,2923,2925,2927,2929,2931,2934,2936,2939],{"class":1052,"line":1714},[1050,2906,2264],{"class":1063},[1050,2908,2737],{"class":1253},[1050,2910,2740],{"class":1071},[1050,2912,1396],{"class":1355},[1050,2914,2574],{"class":1359},[1050,2916,1396],{"class":1355},[1050,2918,2749],{"class":1071},[1050,2920,2854],{"class":1699},[1050,2922,1123],{"class":1071},[1050,2924,2593],{"class":1355},[1050,2926,2817],{"class":1359},[1050,2928,1396],{"class":1355},[1050,2930,2749],{"class":1071},[1050,2932,2933],{"class":1349}," str",[1050,2935,1188],{"class":1071},[1050,2937,2938],{"class":1253},"e",[1050,2940,2941],{"class":1071},")})\n",[1050,2943,2944],{"class":1052,"line":1734},[1050,2945,1154],{"emptyLinePlaceholder":1153},[1050,2947,2948],{"class":1052,"line":1744},[1050,2949,2950],{"class":1056},"# Class-based view with atomic decorator\n",[1050,2952,2953,2955,2957,2959,2961,2963,2966,2968],{"class":1052,"line":1749},[1050,2954,1064],{"class":1063},[1050,2956,1068],{"class":1067},[1050,2958,1072],{"class":1071},[1050,2960,2321],{"class":1067},[1050,2962,1072],{"class":1071},[1050,2964,2965],{"class":1067},"generic ",[1050,2967,1078],{"class":1063},[1050,2969,2970],{"class":1067}," CreateView\n",[1050,2972,2973],{"class":1052,"line":1766},[1050,2974,1154],{"emptyLinePlaceholder":1153},[1050,2976,2977,2980,2984,2986,2990],{"class":1052,"line":1772},[1050,2978,2979],{"class":1181},"class",[1050,2981,2983],{"class":2982},"sD-vU"," AtomicOrderCreateView",[1050,2985,1188],{"class":1071},[1050,2987,2989],{"class":2988},"sYn-s","CreateView",[1050,2991,1205],{"class":1071},[1050,2993,2994,2997,2999],{"class":1052,"line":1792},[1050,2995,2996],{"class":1067},"    model ",[1050,2998,1240],{"class":1071},[1050,3000,3001],{"class":1067}," Order\n",[1050,3003,3004],{"class":1052,"line":1804},[1050,3005,1225],{"class":1067},[1050,3007,3008,3011,3013,3015],{"class":1052,"line":1821},[1050,3009,3010],{"class":1071},"    @",[1050,3012,1170],{"class":1169},[1050,3014,1072],{"class":1071},[1050,3016,1175],{"class":1169},[1050,3018,3019,3022,3025,3027,3031,3033,3036],{"class":1052,"line":1833},[1050,3020,3021],{"class":1181},"    def",[1050,3023,3024],{"class":1169}," form_valid",[1050,3026,1188],{"class":1071},[1050,3028,3030],{"class":3029},"sRjD_","self",[1050,3032,1123],{"class":1071},[1050,3034,3035],{"class":1191}," form",[1050,3037,1205],{"class":1071},[1050,3039,3040,3043,3046],{"class":1052,"line":1839},[1050,3041,3042],{"class":1211},"        \"\"\"",[1050,3044,3045],{"class":1215},"Override form_valid to add transaction management",[1050,3047,1219],{"class":1211},[1050,3049,3050],{"class":1052,"line":1845},[1050,3051,1842],{"class":1067},[1050,3053,3054],{"class":1052,"line":1856},[1050,3055,1769],{"class":1056},[1050,3057,3058,3062,3064,3067,3069,3071,3073,3075,3077,3080,3082,3085],{"class":1052,"line":1861},[1050,3059,3061],{"class":3060},"se3Ec","        self",[1050,3063,1072],{"class":1071},[1050,3065,3066],{"class":1247},"object",[1050,3068,1388],{"class":1071},[1050,3070,3035],{"class":1067},[1050,3072,1072],{"class":1071},[1050,3074,1453],{"class":1253},[1050,3076,1188],{"class":1071},[1050,3078,3079],{"class":1265},"commit",[1050,3081,1240],{"class":1071},[1050,3083,3084],{"class":1699},"False",[1050,3086,1273],{"class":1071},[1050,3088,3089,3091,3093,3095,3097,3099,3101,3104,3106,3108,3110],{"class":1052,"line":1877},[1050,3090,3061],{"class":3060},[1050,3092,1072],{"class":1071},[1050,3094,3066],{"class":1247},[1050,3096,1072],{"class":1071},[1050,3098,1724],{"class":1247},[1050,3100,1388],{"class":1071},[1050,3102,3103],{"class":3060}," self",[1050,3105,1072],{"class":1071},[1050,3107,2380],{"class":1247},[1050,3109,1072],{"class":1071},[1050,3111,3112],{"class":1247},"user\n",[1050,3114,3115,3117,3119,3121,3123,3125],{"class":1052,"line":1901},[1050,3116,3061],{"class":3060},[1050,3118,1072],{"class":1071},[1050,3120,3066],{"class":1247},[1050,3122,1072],{"class":1071},[1050,3124,1453],{"class":1253},[1050,3126,2633],{"class":1071},[1050,3128,3129],{"class":1052,"line":1925},[1050,3130,1842],{"class":1067},[1050,3132,3133],{"class":1052,"line":1931},[1050,3134,3135],{"class":1056},"        # Process cart items\n",[1050,3137,3138,3141,3143,3146,3148,3150,3152,3155,3157,3159,3161,3163,3165,3167,3169,3171],{"class":1052,"line":1937},[1050,3139,3140],{"class":1067},"        cart_items ",[1050,3142,1240],{"class":1071},[1050,3144,3145],{"class":1067}," CartItem",[1050,3147,1072],{"class":1071},[1050,3149,1248],{"class":1247},[1050,3151,1072],{"class":1071},[1050,3153,3154],{"class":1253},"filter",[1050,3156,1188],{"class":1071},[1050,3158,2471],{"class":1265},[1050,3160,1240],{"class":1071},[1050,3162,3030],{"class":3060},[1050,3164,1072],{"class":1071},[1050,3166,2380],{"class":1247},[1050,3168,1072],{"class":1071},[1050,3170,2471],{"class":1247},[1050,3172,1273],{"class":1071},[1050,3174,3175],{"class":1052,"line":1943},[1050,3176,1842],{"class":1067},[1050,3178,3179,3181,3184,3186,3189],{"class":1052,"line":1974},[1050,3180,1864],{"class":1063},[1050,3182,3183],{"class":1067}," cart_item ",[1050,3185,1870],{"class":1063},[1050,3187,3188],{"class":1067}," cart_items",[1050,3190,1340],{"class":1071},[1050,3192,3193],{"class":1052,"line":2005},[1050,3194,3195],{"class":1056},"            # Check stock\n",[1050,3197,3198,3200,3203,3205,3207,3209,3211,3213,3215,3217,3219],{"class":1052,"line":2010},[1050,3199,1946],{"class":1063},[1050,3201,3202],{"class":1067}," cart_item",[1050,3204,1072],{"class":1071},[1050,3206,1991],{"class":1247},[1050,3208,1072],{"class":1071},[1050,3210,1954],{"class":1247},[1050,3212,1335],{"class":1334},[1050,3214,3202],{"class":1067},[1050,3216,1072],{"class":1071},[1050,3218,1966],{"class":1247},[1050,3220,1340],{"class":1071},[1050,3222,3223,3225,3227,3229,3231,3233,3235,3238,3240,3242,3244,3246,3248,3250],{"class":1052,"line":2016},[1050,3224,1977],{"class":1063},[1050,3226,1350],{"class":1349},[1050,3228,1188],{"class":1071},[1050,3230,1580],{"class":1181},[1050,3232,1986],{"class":1359},[1050,3234,1587],{"class":1586},[1050,3236,3237],{"class":1253},"cart_item",[1050,3239,1072],{"class":1071},[1050,3241,1991],{"class":1247},[1050,3243,1072],{"class":1071},[1050,3245,1996],{"class":1247},[1050,3247,1592],{"class":1586},[1050,3249,1356],{"class":1359},[1050,3251,1273],{"class":1071},[1050,3253,3254],{"class":1052,"line":2037},[1050,3255,1934],{"class":1067},[1050,3257,3258],{"class":1052,"line":2050},[1050,3259,2013],{"class":1056},[1050,3261,3262,3265,3267,3269,3271,3273],{"class":1052,"line":2062},[1050,3263,3264],{"class":1067},"            OrderItem",[1050,3266,1072],{"class":1071},[1050,3268,1248],{"class":1247},[1050,3270,1072],{"class":1071},[1050,3272,1519],{"class":1253},[1050,3274,1522],{"class":1071},[1050,3276,3277,3279,3281,3283,3285,3287],{"class":1052,"line":2083},[1050,3278,2040],{"class":1265},[1050,3280,1240],{"class":1071},[1050,3282,3030],{"class":3060},[1050,3284,1072],{"class":1071},[1050,3286,3066],{"class":1247},[1050,3288,1536],{"class":1071},[1050,3290,3291,3293,3295,3297,3299,3301],{"class":1052,"line":2098},[1050,3292,2053],{"class":1265},[1050,3294,1240],{"class":1071},[1050,3296,3237],{"class":1253},[1050,3298,1072],{"class":1071},[1050,3300,1991],{"class":1247},[1050,3302,1536],{"class":1071},[1050,3304,3305,3307,3309,3311,3313,3315],{"class":1052,"line":2103},[1050,3306,2065],{"class":1265},[1050,3308,1240],{"class":1071},[1050,3310,3237],{"class":1253},[1050,3312,1072],{"class":1071},[1050,3314,1966],{"class":1247},[1050,3316,1536],{"class":1071},[1050,3318,3319,3321,3323,3325,3327,3329,3331],{"class":1052,"line":2108},[1050,3320,2086],{"class":1265},[1050,3322,1240],{"class":1071},[1050,3324,3237],{"class":1253},[1050,3326,1072],{"class":1071},[1050,3328,1991],{"class":1247},[1050,3330,1072],{"class":1071},[1050,3332,2095],{"class":1247},[1050,3334,3335],{"class":1052,"line":2114},[1050,3336,1928],{"class":1071},[1050,3338,3339],{"class":1052,"line":2152},[1050,3340,1934],{"class":1067},[1050,3342,3343],{"class":1052,"line":2175},[1050,3344,2111],{"class":1056},[1050,3346,3347,3350,3352,3354,3356,3358,3360,3362,3364,3366,3368,3370,3372,3374,3376,3378],{"class":1052,"line":2180},[1050,3348,3349],{"class":1067},"            cart_item",[1050,3351,1072],{"class":1071},[1050,3353,1991],{"class":1247},[1050,3355,1072],{"class":1071},[1050,3357,1954],{"class":1247},[1050,3359,1388],{"class":1071},[1050,3361,1391],{"class":1253},[1050,3363,1188],{"class":1071},[1050,3365,1396],{"class":1355},[1050,3367,1954],{"class":1359},[1050,3369,1396],{"class":1355},[1050,3371,1403],{"class":1071},[1050,3373,1406],{"class":1334},[1050,3375,3202],{"class":1067},[1050,3377,1072],{"class":1071},[1050,3379,3380],{"class":1247},"quantity\n",[1050,3382,3383,3385,3387,3389,3391,3393],{"class":1052,"line":2206},[1050,3384,3349],{"class":1067},[1050,3386,1072],{"class":1071},[1050,3388,1991],{"class":1247},[1050,3390,1072],{"class":1071},[1050,3392,1453],{"class":1253},[1050,3394,2633],{"class":1071},[1050,3396,3397],{"class":1052,"line":2211},[1050,3398,1842],{"class":1067},[1050,3400,3401],{"class":1052,"line":2217},[1050,3402,3403],{"class":1056},"        # Clear cart\n",[1050,3405,3406,3409,3411,3414],{"class":1052,"line":2233},[1050,3407,3408],{"class":1067},"        cart_items",[1050,3410,1072],{"class":1071},[1050,3412,3413],{"class":1253},"delete",[1050,3415,2633],{"class":1071},[1050,3417,3418],{"class":1052,"line":2256},[1050,3419,1842],{"class":1067},[1050,3421,3422,3424,3427,3429,3432,3434,3437],{"class":1052,"line":2261},[1050,3423,2264],{"class":1063},[1050,3425,3426],{"class":1349}," super",[1050,3428,1257],{"class":1071},[1050,3430,3431],{"class":1253},"form_valid",[1050,3433,1188],{"class":1071},[1050,3435,3436],{"class":1253},"form",[1050,3438,1273],{"class":1071},[1035,3440,3442],{"id":3441},"context-manager-approach","Context Manager Approach",[1040,3444,3446],{"className":1042,"code":3445,"language":1044,"meta":1045,"style":1045},"from django.db import transaction\n\ndef complex_business_operation(user_id, operation_data):\n    \"\"\"Complex operation with nested transactions and savepoints\"\"\"\n    \n    with transaction.atomic():\n        user = User.objects.select_for_update().get(id=user_id)\n        \n        # Create audit log\n        audit_log = AuditLog.objects.create(\n            user=user,\n            operation='complex_business_operation',\n            status='started',\n            data=operation_data\n        )\n        \n        try:\n            # Step 1: Update user profile\n            user.profile.credits = F('credits') + operation_data['credit_adjustment']\n            user.profile.save()\n            \n            # Step 2: Process each sub-operation\n            for sub_op in operation_data['sub_operations']:\n                # Create savepoint for each sub-operation\n                with transaction.atomic():\n                    process_sub_operation(user, sub_op)\n            \n            # Step 3: Send notifications\n            send_operation_notifications(user, operation_data)\n            \n            # Update audit log\n            audit_log.status = 'completed'\n            audit_log.save()\n            \n            return {'success': True, 'audit_id': audit_log.id}\n            \n        except Exception as e:\n            # Update audit log with error\n            audit_log.status = 'failed'\n            audit_log.error_message = str(e)\n            audit_log.save()\n            \n            # Re-raise to trigger rollback\n            raise\n\ndef process_sub_operation(user, sub_op_data):\n    \"\"\"Process individual sub-operation with its own transaction boundary\"\"\"\n    \n    if sub_op_data['type'] == 'purchase':\n        product = Product.objects.select_for_update().get(id=sub_op_data['product_id'])\n        \n        if product.stock_quantity \u003C sub_op_data['quantity']:\n            raise ValueError(f\"Insufficient stock for {product.name}\")\n        \n        # Create purchase record\n        Purchase.objects.create(\n            user=user,\n            product=product,\n            quantity=sub_op_data['quantity'],\n            unit_price=product.price\n        )\n        \n        # Update stock\n        product.stock_quantity = F('stock_quantity') - sub_op_data['quantity']\n        product.save()\n        \n    elif sub_op_data['type'] == 'reward':\n        # Award points or credits\n        user.profile.reward_points = F('reward_points') + sub_op_data['points']\n        user.profile.save()\n        \n        RewardTransaction.objects.create(\n            user=user,\n            points=sub_op_data['points'],\n            reason=sub_op_data['reason']\n        )\n",[1047,3447,3448,3462,3466,3485,3494,3498,3510,3542,3546,3551,3571,3581,3597,3612,3622,3626,3630,3637,3642,3685,3699,3703,3708,3731,3736,3749,3765,3769,3774,3789,3793,3798,3815,3825,3829,3867,3871,3884,3889,3905,3923,3933,3937,3942,3947,3951,3969,3978,3982,4012,4052,4056,4080,4107,4111,4116,4131,4141,4151,4170,4183,4187,4191,4196,4233,4243,4247,4275,4280,4323,4337,4341,4356,4366,4385,4405],{"__ignoreMap":1045},[1050,3449,3450,3452,3454,3456,3458,3460],{"class":1052,"line":1053},[1050,3451,1064],{"class":1063},[1050,3453,1068],{"class":1067},[1050,3455,1072],{"class":1071},[1050,3457,1075],{"class":1067},[1050,3459,1078],{"class":1063},[1050,3461,1081],{"class":1067},[1050,3463,3464],{"class":1052,"line":1060},[1050,3465,1154],{"emptyLinePlaceholder":1153},[1050,3467,3468,3470,3473,3475,3478,3480,3483],{"class":1052,"line":1084},[1050,3469,1182],{"class":1181},[1050,3471,3472],{"class":1169}," complex_business_operation",[1050,3474,1188],{"class":1071},[1050,3476,3477],{"class":1191},"user_id",[1050,3479,1123],{"class":1071},[1050,3481,3482],{"class":1191}," operation_data",[1050,3484,1205],{"class":1071},[1050,3486,3487,3489,3492],{"class":1052,"line":1106},[1050,3488,1212],{"class":1211},[1050,3490,3491],{"class":1215},"Complex operation with nested transactions and savepoints",[1050,3493,1219],{"class":1211},[1050,3495,3496],{"class":1052,"line":1150},[1050,3497,1225],{"class":1067},[1050,3499,3500,3502,3504,3506,3508],{"class":1052,"line":1157},[1050,3501,1752],{"class":1063},[1050,3503,1755],{"class":1067},[1050,3505,1072],{"class":1071},[1050,3507,1760],{"class":1253},[1050,3509,1763],{"class":1071},[1050,3511,3512,3515,3517,3520,3522,3524,3526,3528,3530,3532,3534,3536,3538,3540],{"class":1052,"line":1163},[1050,3513,3514],{"class":1067},"        user ",[1050,3516,1240],{"class":1071},[1050,3518,3519],{"class":1067}," User",[1050,3521,1072],{"class":1071},[1050,3523,1248],{"class":1247},[1050,3525,1072],{"class":1071},[1050,3527,1254],{"class":1253},[1050,3529,1257],{"class":1071},[1050,3531,1260],{"class":1253},[1050,3533,1188],{"class":1071},[1050,3535,1266],{"class":1265},[1050,3537,1240],{"class":1071},[1050,3539,3477],{"class":1253},[1050,3541,1273],{"class":1071},[1050,3543,3544],{"class":1052,"line":1178},[1050,3545,1842],{"class":1067},[1050,3547,3548],{"class":1052,"line":1208},[1050,3549,3550],{"class":1056},"        # Create audit log\n",[1050,3552,3553,3556,3558,3561,3563,3565,3567,3569],{"class":1052,"line":1222},[1050,3554,3555],{"class":1067},"        audit_log ",[1050,3557,1240],{"class":1071},[1050,3559,3560],{"class":1067}," AuditLog",[1050,3562,1072],{"class":1071},[1050,3564,1248],{"class":1247},[1050,3566,1072],{"class":1071},[1050,3568,1519],{"class":1253},[1050,3570,1522],{"class":1071},[1050,3572,3573,3575,3577,3579],{"class":1052,"line":1228},[1050,3574,2462],{"class":1265},[1050,3576,1240],{"class":1071},[1050,3578,2471],{"class":1253},[1050,3580,1536],{"class":1071},[1050,3582,3583,3586,3588,3590,3593,3595],{"class":1052,"line":1234},[1050,3584,3585],{"class":1265},"            operation",[1050,3587,1240],{"class":1071},[1050,3589,1396],{"class":1355},[1050,3591,3592],{"class":1359},"complex_business_operation",[1050,3594,1396],{"class":1355},[1050,3596,1536],{"class":1071},[1050,3598,3599,3601,3603,3605,3608,3610],{"class":1052,"line":1276},[1050,3600,1807],{"class":1265},[1050,3602,1240],{"class":1071},[1050,3604,1396],{"class":1355},[1050,3606,3607],{"class":1359},"started",[1050,3609,1396],{"class":1355},[1050,3611,1536],{"class":1071},[1050,3613,3614,3617,3619],{"class":1052,"line":1309},[1050,3615,3616],{"class":1265},"            data",[1050,3618,1240],{"class":1071},[1050,3620,3621],{"class":1253},"operation_data\n",[1050,3623,3624],{"class":1052,"line":1314},[1050,3625,1836],{"class":1071},[1050,3627,3628],{"class":1052,"line":1320},[1050,3629,1842],{"class":1067},[1050,3631,3632,3635],{"class":1052,"line":1343},[1050,3633,3634],{"class":1063},"        try",[1050,3636,1340],{"class":1071},[1050,3638,3639],{"class":1052,"line":1367},[1050,3640,3641],{"class":1056},"            # Step 1: Update user profile\n",[1050,3643,3644,3646,3648,3651,3653,3656,3658,3660,3662,3664,3666,3668,3670,3672,3674,3676,3678,3681,3683],{"class":1052,"line":1372},[1050,3645,2462],{"class":1067},[1050,3647,1072],{"class":1071},[1050,3649,3650],{"class":1247},"profile",[1050,3652,1072],{"class":1071},[1050,3654,3655],{"class":1247},"credits",[1050,3657,1388],{"class":1071},[1050,3659,1391],{"class":1253},[1050,3661,1188],{"class":1071},[1050,3663,1396],{"class":1355},[1050,3665,3655],{"class":1359},[1050,3667,1396],{"class":1355},[1050,3669,1403],{"class":1071},[1050,3671,1436],{"class":1334},[1050,3673,3482],{"class":1067},[1050,3675,1912],{"class":1071},[1050,3677,1396],{"class":1355},[1050,3679,3680],{"class":1359},"credit_adjustment",[1050,3682,1396],{"class":1355},[1050,3684,1922],{"class":1071},[1050,3686,3687,3689,3691,3693,3695,3697],{"class":1052,"line":1378},[1050,3688,2462],{"class":1067},[1050,3690,1072],{"class":1071},[1050,3692,3650],{"class":1247},[1050,3694,1072],{"class":1071},[1050,3696,1453],{"class":1253},[1050,3698,2633],{"class":1071},[1050,3700,3701],{"class":1052,"line":1412},[1050,3702,1934],{"class":1067},[1050,3704,3705],{"class":1052,"line":1441},[1050,3706,3707],{"class":1056},"            # Step 2: Process each sub-operation\n",[1050,3709,3710,3713,3716,3718,3720,3722,3724,3727,3729],{"class":1052,"line":1446},[1050,3711,3712],{"class":1063},"            for",[1050,3714,3715],{"class":1067}," sub_op ",[1050,3717,1870],{"class":1063},[1050,3719,3482],{"class":1067},[1050,3721,1912],{"class":1071},[1050,3723,1396],{"class":1355},[1050,3725,3726],{"class":1359},"sub_operations",[1050,3728,1396],{"class":1355},[1050,3730,1971],{"class":1071},[1050,3732,3733],{"class":1052,"line":1473},[1050,3734,3735],{"class":1056},"                # Create savepoint for each sub-operation\n",[1050,3737,3738,3741,3743,3745,3747],{"class":1052,"line":1496},[1050,3739,3740],{"class":1063},"                with",[1050,3742,1755],{"class":1067},[1050,3744,1072],{"class":1071},[1050,3746,1760],{"class":1253},[1050,3748,1763],{"class":1071},[1050,3750,3751,3754,3756,3758,3760,3763],{"class":1052,"line":1501},[1050,3752,3753],{"class":1253},"                    process_sub_operation",[1050,3755,1188],{"class":1071},[1050,3757,2471],{"class":1253},[1050,3759,1123],{"class":1071},[1050,3761,3762],{"class":1253}," sub_op",[1050,3764,1273],{"class":1071},[1050,3766,3767],{"class":1052,"line":1507},[1050,3768,1934],{"class":1067},[1050,3770,3771],{"class":1052,"line":1525},[1050,3772,3773],{"class":1056},"            # Step 3: Send notifications\n",[1050,3775,3776,3779,3781,3783,3785,3787],{"class":1052,"line":1539},[1050,3777,3778],{"class":1253},"            send_operation_notifications",[1050,3780,1188],{"class":1071},[1050,3782,2471],{"class":1253},[1050,3784,1123],{"class":1071},[1050,3786,3482],{"class":1253},[1050,3788,1273],{"class":1071},[1050,3790,3791],{"class":1052,"line":1555},[1050,3792,1934],{"class":1067},[1050,3794,3795],{"class":1052,"line":1572},[1050,3796,3797],{"class":1056},"            # Update audit log\n",[1050,3799,3800,3803,3805,3807,3809,3811,3813],{"class":1052,"line":1598},[1050,3801,3802],{"class":1067},"            audit_log",[1050,3804,1072],{"class":1071},[1050,3806,2588],{"class":1247},[1050,3808,1388],{"class":1071},[1050,3810,2593],{"class":1355},[1050,3812,2596],{"class":1359},[1050,3814,1595],{"class":1355},[1050,3816,3817,3819,3821,3823],{"class":1052,"line":1604},[1050,3818,3802],{"class":1067},[1050,3820,1072],{"class":1071},[1050,3822,1453],{"class":1253},[1050,3824,2633],{"class":1071},[1050,3826,3827],{"class":1052,"line":1609},[1050,3828,1934],{"class":1067},[1050,3830,3831,3833,3836,3838,3840,3842,3844,3846,3848,3850,3853,3855,3857,3860,3862,3864],{"class":1052,"line":1624},[1050,3832,2734],{"class":1063},[1050,3834,3835],{"class":1071}," {",[1050,3837,1396],{"class":1355},[1050,3839,2574],{"class":1359},[1050,3841,1396],{"class":1355},[1050,3843,2749],{"class":1071},[1050,3845,2752],{"class":1699},[1050,3847,1123],{"class":1071},[1050,3849,2593],{"class":1355},[1050,3851,3852],{"class":1359},"audit_id",[1050,3854,1396],{"class":1355},[1050,3856,2749],{"class":1071},[1050,3858,3859],{"class":1067}," audit_log",[1050,3861,1072],{"class":1071},[1050,3863,1266],{"class":1247},[1050,3865,3866],{"class":1071},"}\n",[1050,3868,3869],{"class":1052,"line":1636},[1050,3870,1934],{"class":1067},[1050,3872,3873,3876,3878,3880,3882],{"class":1052,"line":1647},[1050,3874,3875],{"class":1063},"        except",[1050,3877,2889],{"class":1349},[1050,3879,2892],{"class":1063},[1050,3881,2895],{"class":1067},[1050,3883,1340],{"class":1071},[1050,3885,3886],{"class":1052,"line":1663},[1050,3887,3888],{"class":1056},"            # Update audit log with error\n",[1050,3890,3891,3893,3895,3897,3899,3901,3903],{"class":1052,"line":1683},[1050,3892,3802],{"class":1067},[1050,3894,1072],{"class":1071},[1050,3896,2588],{"class":1247},[1050,3898,1388],{"class":1071},[1050,3900,2593],{"class":1355},[1050,3902,2795],{"class":1359},[1050,3904,1595],{"class":1355},[1050,3906,3907,3909,3911,3913,3915,3917,3919,3921],{"class":1052,"line":1688},[1050,3908,3802],{"class":1067},[1050,3910,1072],{"class":1071},[1050,3912,2806],{"class":1247},[1050,3914,1388],{"class":1071},[1050,3916,2933],{"class":1349},[1050,3918,1188],{"class":1071},[1050,3920,2938],{"class":1253},[1050,3922,1273],{"class":1071},[1050,3924,3925,3927,3929,3931],{"class":1052,"line":1693},[1050,3926,3802],{"class":1067},[1050,3928,1072],{"class":1071},[1050,3930,1453],{"class":1253},[1050,3932,2633],{"class":1071},[1050,3934,3935],{"class":1052,"line":1703},[1050,3936,1934],{"class":1067},[1050,3938,3939],{"class":1052,"line":1708},[1050,3940,3941],{"class":1056},"            # Re-raise to trigger rollback\n",[1050,3943,3944],{"class":1052,"line":1714},[1050,3945,3946],{"class":1063},"            raise\n",[1050,3948,3949],{"class":1052,"line":1734},[1050,3950,1154],{"emptyLinePlaceholder":1153},[1050,3952,3953,3955,3958,3960,3962,3964,3967],{"class":1052,"line":1744},[1050,3954,1182],{"class":1181},[1050,3956,3957],{"class":1169}," process_sub_operation",[1050,3959,1188],{"class":1071},[1050,3961,2471],{"class":1191},[1050,3963,1123],{"class":1071},[1050,3965,3966],{"class":1191}," sub_op_data",[1050,3968,1205],{"class":1071},[1050,3970,3971,3973,3976],{"class":1052,"line":1749},[1050,3972,1212],{"class":1211},[1050,3974,3975],{"class":1215},"Process individual sub-operation with its own transaction boundary",[1050,3977,1219],{"class":1211},[1050,3979,3980],{"class":1052,"line":1766},[1050,3981,1225],{"class":1067},[1050,3983,3984,3986,3988,3990,3992,3995,3997,4000,4003,4005,4008,4010],{"class":1052,"line":1772},[1050,3985,1323],{"class":1063},[1050,3987,3966],{"class":1067},[1050,3989,1912],{"class":1071},[1050,3991,1396],{"class":1355},[1050,3993,3994],{"class":1359},"type",[1050,3996,1396],{"class":1355},[1050,3998,3999],{"class":1071},"]",[1050,4001,4002],{"class":1334}," ==",[1050,4004,2593],{"class":1355},[1050,4006,4007],{"class":1359},"purchase",[1050,4009,1396],{"class":1355},[1050,4011,1340],{"class":1071},[1050,4013,4014,4017,4019,4021,4023,4025,4027,4029,4031,4033,4035,4037,4039,4042,4044,4046,4048,4050],{"class":1052,"line":1792},[1050,4015,4016],{"class":1067},"        product ",[1050,4018,1240],{"class":1071},[1050,4020,1137],{"class":1067},[1050,4022,1072],{"class":1071},[1050,4024,1248],{"class":1247},[1050,4026,1072],{"class":1071},[1050,4028,1254],{"class":1253},[1050,4030,1257],{"class":1071},[1050,4032,1260],{"class":1253},[1050,4034,1188],{"class":1071},[1050,4036,1266],{"class":1265},[1050,4038,1240],{"class":1071},[1050,4040,4041],{"class":1253},"sub_op_data",[1050,4043,1912],{"class":1071},[1050,4045,1396],{"class":1355},[1050,4047,1917],{"class":1359},[1050,4049,1396],{"class":1355},[1050,4051,1470],{"class":1071},[1050,4053,4054],{"class":1052,"line":1804},[1050,4055,1842],{"class":1067},[1050,4057,4058,4060,4062,4064,4066,4068,4070,4072,4074,4076,4078],{"class":1052,"line":1821},[1050,4059,2564],{"class":1063},[1050,4061,1949],{"class":1067},[1050,4063,1072],{"class":1071},[1050,4065,1954],{"class":1247},[1050,4067,1335],{"class":1334},[1050,4069,3966],{"class":1067},[1050,4071,1912],{"class":1071},[1050,4073,1396],{"class":1355},[1050,4075,1966],{"class":1359},[1050,4077,1396],{"class":1355},[1050,4079,1971],{"class":1071},[1050,4081,4082,4085,4087,4089,4091,4093,4095,4097,4099,4101,4103,4105],{"class":1052,"line":1833},[1050,4083,4084],{"class":1063},"            raise",[1050,4086,1350],{"class":1349},[1050,4088,1188],{"class":1071},[1050,4090,1580],{"class":1181},[1050,4092,1986],{"class":1359},[1050,4094,1587],{"class":1586},[1050,4096,1991],{"class":1253},[1050,4098,1072],{"class":1071},[1050,4100,1996],{"class":1247},[1050,4102,1592],{"class":1586},[1050,4104,1356],{"class":1359},[1050,4106,1273],{"class":1071},[1050,4108,4109],{"class":1052,"line":1839},[1050,4110,1842],{"class":1067},[1050,4112,4113],{"class":1052,"line":1845},[1050,4114,4115],{"class":1056},"        # Create purchase record\n",[1050,4117,4118,4121,4123,4125,4127,4129],{"class":1052,"line":1856},[1050,4119,4120],{"class":1067},"        Purchase",[1050,4122,1072],{"class":1071},[1050,4124,1248],{"class":1247},[1050,4126,1072],{"class":1071},[1050,4128,1519],{"class":1253},[1050,4130,1522],{"class":1071},[1050,4132,4133,4135,4137,4139],{"class":1052,"line":1861},[1050,4134,2462],{"class":1265},[1050,4136,1240],{"class":1071},[1050,4138,2471],{"class":1253},[1050,4140,1536],{"class":1071},[1050,4142,4143,4145,4147,4149],{"class":1052,"line":1877},[1050,4144,2117],{"class":1265},[1050,4146,1240],{"class":1071},[1050,4148,1991],{"class":1253},[1050,4150,1536],{"class":1071},[1050,4152,4153,4156,4158,4160,4162,4164,4166,4168],{"class":1052,"line":1901},[1050,4154,4155],{"class":1265},"            quantity",[1050,4157,1240],{"class":1071},[1050,4159,4041],{"class":1253},[1050,4161,1912],{"class":1071},[1050,4163,1396],{"class":1355},[1050,4165,1966],{"class":1359},[1050,4167,1396],{"class":1355},[1050,4169,2080],{"class":1071},[1050,4171,4172,4175,4177,4179,4181],{"class":1052,"line":1925},[1050,4173,4174],{"class":1265},"            unit_price",[1050,4176,1240],{"class":1071},[1050,4178,1991],{"class":1253},[1050,4180,1072],{"class":1071},[1050,4182,2095],{"class":1247},[1050,4184,4185],{"class":1052,"line":1931},[1050,4186,1836],{"class":1071},[1050,4188,4189],{"class":1052,"line":1937},[1050,4190,1842],{"class":1067},[1050,4192,4193],{"class":1052,"line":1943},[1050,4194,4195],{"class":1056},"        # Update stock\n",[1050,4197,4198,4201,4203,4205,4207,4209,4211,4213,4215,4217,4219,4221,4223,4225,4227,4229,4231],{"class":1052,"line":1974},[1050,4199,4200],{"class":1067},"        product",[1050,4202,1072],{"class":1071},[1050,4204,1954],{"class":1247},[1050,4206,1388],{"class":1071},[1050,4208,1391],{"class":1253},[1050,4210,1188],{"class":1071},[1050,4212,1396],{"class":1355},[1050,4214,1954],{"class":1359},[1050,4216,1396],{"class":1355},[1050,4218,1403],{"class":1071},[1050,4220,1406],{"class":1334},[1050,4222,3966],{"class":1067},[1050,4224,1912],{"class":1071},[1050,4226,1396],{"class":1355},[1050,4228,1966],{"class":1359},[1050,4230,1396],{"class":1355},[1050,4232,1922],{"class":1071},[1050,4234,4235,4237,4239,4241],{"class":1052,"line":2005},[1050,4236,4200],{"class":1067},[1050,4238,1072],{"class":1071},[1050,4240,1453],{"class":1253},[1050,4242,2633],{"class":1071},[1050,4244,4245],{"class":1052,"line":2010},[1050,4246,1842],{"class":1067},[1050,4248,4249,4252,4254,4256,4258,4260,4262,4264,4266,4268,4271,4273],{"class":1052,"line":2016},[1050,4250,4251],{"class":1063},"    elif",[1050,4253,3966],{"class":1067},[1050,4255,1912],{"class":1071},[1050,4257,1396],{"class":1355},[1050,4259,3994],{"class":1359},[1050,4261,1396],{"class":1355},[1050,4263,3999],{"class":1071},[1050,4265,4002],{"class":1334},[1050,4267,2593],{"class":1355},[1050,4269,4270],{"class":1359},"reward",[1050,4272,1396],{"class":1355},[1050,4274,1340],{"class":1071},[1050,4276,4277],{"class":1052,"line":2037},[1050,4278,4279],{"class":1056},"        # Award points or credits\n",[1050,4281,4282,4285,4287,4289,4291,4294,4296,4298,4300,4302,4304,4306,4308,4310,4312,4314,4316,4319,4321],{"class":1052,"line":2050},[1050,4283,4284],{"class":1067},"        user",[1050,4286,1072],{"class":1071},[1050,4288,3650],{"class":1247},[1050,4290,1072],{"class":1071},[1050,4292,4293],{"class":1247},"reward_points",[1050,4295,1388],{"class":1071},[1050,4297,1391],{"class":1253},[1050,4299,1188],{"class":1071},[1050,4301,1396],{"class":1355},[1050,4303,4293],{"class":1359},[1050,4305,1396],{"class":1355},[1050,4307,1403],{"class":1071},[1050,4309,1436],{"class":1334},[1050,4311,3966],{"class":1067},[1050,4313,1912],{"class":1071},[1050,4315,1396],{"class":1355},[1050,4317,4318],{"class":1359},"points",[1050,4320,1396],{"class":1355},[1050,4322,1922],{"class":1071},[1050,4324,4325,4327,4329,4331,4333,4335],{"class":1052,"line":2062},[1050,4326,4284],{"class":1067},[1050,4328,1072],{"class":1071},[1050,4330,3650],{"class":1247},[1050,4332,1072],{"class":1071},[1050,4334,1453],{"class":1253},[1050,4336,2633],{"class":1071},[1050,4338,4339],{"class":1052,"line":2083},[1050,4340,1842],{"class":1067},[1050,4342,4343,4346,4348,4350,4352,4354],{"class":1052,"line":2098},[1050,4344,4345],{"class":1067},"        RewardTransaction",[1050,4347,1072],{"class":1071},[1050,4349,1248],{"class":1247},[1050,4351,1072],{"class":1071},[1050,4353,1519],{"class":1253},[1050,4355,1522],{"class":1071},[1050,4357,4358,4360,4362,4364],{"class":1052,"line":2103},[1050,4359,2462],{"class":1265},[1050,4361,1240],{"class":1071},[1050,4363,2471],{"class":1253},[1050,4365,1536],{"class":1071},[1050,4367,4368,4371,4373,4375,4377,4379,4381,4383],{"class":1052,"line":2108},[1050,4369,4370],{"class":1265},"            points",[1050,4372,1240],{"class":1071},[1050,4374,4041],{"class":1253},[1050,4376,1912],{"class":1071},[1050,4378,1396],{"class":1355},[1050,4380,4318],{"class":1359},[1050,4382,1396],{"class":1355},[1050,4384,2080],{"class":1071},[1050,4386,4387,4390,4392,4394,4396,4398,4401,4403],{"class":1052,"line":2114},[1050,4388,4389],{"class":1265},"            reason",[1050,4391,1240],{"class":1071},[1050,4393,4041],{"class":1253},[1050,4395,1912],{"class":1071},[1050,4397,1396],{"class":1355},[1050,4399,4400],{"class":1359},"reason",[1050,4402,1396],{"class":1355},[1050,4404,1922],{"class":1071},[1050,4406,4407],{"class":1052,"line":2152},[1050,4408,1836],{"class":1071},[1030,4410,4412],{"id":4411},"savepoints-and-nested-transactions","Savepoints and Nested Transactions",[1035,4414,4416],{"id":4415},"using-savepoints","Using Savepoints",[1040,4418,4420],{"className":1042,"code":4419,"language":1044,"meta":1045,"style":1045},"from django.db import transaction\n\ndef batch_import_with_error_handling(data_records):\n    \"\"\"Import data with savepoints for error recovery\"\"\"\n    \n    results = {\n        'successful': 0,\n        'failed': 0,\n        'errors': []\n    }\n    \n    with transaction.atomic():\n        for i, record in enumerate(data_records):\n            try:\n                # Create savepoint for each record\n                with transaction.atomic():\n                    import_single_record(record)\n                    results['successful'] += 1\n                    \n            except Exception as e:\n                # Savepoint is automatically rolled back\n                results['failed'] += 1\n                results['errors'].append({\n                    'record_index': i,\n                    'error': str(e),\n                    'record_data': record\n                })\n                \n                # Continue with next record\n                continue\n    \n    return results\n\ndef import_single_record(record_data):\n    \"\"\"Import a single record with validation\"\"\"\n    \n    # Validate required fields\n    if not record_data.get('email'):\n        raise ValueError(\"Email is required\")\n    \n    # Check for duplicates\n    if User.objects.filter(email=record_data['email']).exists():\n        raise ValueError(f\"User with email {record_data['email']} already exists\")\n    \n    # Create user\n    user = User.objects.create(\n        username=record_data['username'],\n        email=record_data['email'],\n        first_name=record_data.get('first_name', ''),\n        last_name=record_data.get('last_name', '')\n    )\n    \n    # Create profile\n    UserProfile.objects.create(\n        user=user,\n        phone=record_data.get('phone', ''),\n        address=record_data.get('address', '')\n    )\n    \n    return user\n\n# Manual savepoint management\ndef advanced_savepoint_usage():\n    \"\"\"Advanced savepoint management\"\"\"\n    \n    with transaction.atomic():\n        # Main transaction work\n        main_record = MainModel.objects.create(name='Main Record')\n        \n        # Create manual savepoint\n        savepoint_id = transaction.savepoint()\n        \n        try:\n            # Risky operation\n            risky_operation(main_record)\n            \n            # If successful, release savepoint\n            transaction.savepoint_commit(savepoint_id)\n            \n        except Exception as e:\n            # Rollback to savepoint\n            transaction.savepoint_rollback(savepoint_id)\n            \n            # Log error but continue\n            ErrorLog.objects.create(\n                related_object=main_record,\n                error_message=str(e)\n            )\n        \n        # Continue with other operations\n        additional_operations(main_record)\n",[1047,4421,4422,4436,4440,4454,4463,4467,4477,4494,4508,4522,4527,4531,4543,4567,4574,4579,4591,4603,4624,4629,4642,4647,4666,4687,4703,4722,4736,4741,4746,4751,4756,4760,4767,4771,4784,4793,4797,4802,4827,4844,4848,4853,4891,4925,4929,4934,4953,4973,4992,5021,5049,5053,5057,5062,5077,5087,5115,5143,5147,5151,5158,5162,5167,5176,5185,5189,5201,5206,5239,5243,5248,5264,5268,5274,5279,5291,5295,5300,5317,5321,5333,5338,5353,5357,5362,5378,5390,5407,5412,5417,5423],{"__ignoreMap":1045},[1050,4423,4424,4426,4428,4430,4432,4434],{"class":1052,"line":1053},[1050,4425,1064],{"class":1063},[1050,4427,1068],{"class":1067},[1050,4429,1072],{"class":1071},[1050,4431,1075],{"class":1067},[1050,4433,1078],{"class":1063},[1050,4435,1081],{"class":1067},[1050,4437,4438],{"class":1052,"line":1060},[1050,4439,1154],{"emptyLinePlaceholder":1153},[1050,4441,4442,4444,4447,4449,4452],{"class":1052,"line":1084},[1050,4443,1182],{"class":1181},[1050,4445,4446],{"class":1169}," batch_import_with_error_handling",[1050,4448,1188],{"class":1071},[1050,4450,4451],{"class":1191},"data_records",[1050,4453,1205],{"class":1071},[1050,4455,4456,4458,4461],{"class":1052,"line":1106},[1050,4457,1212],{"class":1211},[1050,4459,4460],{"class":1215},"Import data with savepoints for error recovery",[1050,4462,1219],{"class":1211},[1050,4464,4465],{"class":1052,"line":1150},[1050,4466,1225],{"class":1067},[1050,4468,4469,4472,4474],{"class":1052,"line":1157},[1050,4470,4471],{"class":1067},"    results ",[1050,4473,1240],{"class":1071},[1050,4475,4476],{"class":1071}," {\n",[1050,4478,4479,4482,4485,4487,4489,4492],{"class":1052,"line":1163},[1050,4480,4481],{"class":1355},"        '",[1050,4483,4484],{"class":1359},"successful",[1050,4486,1396],{"class":1355},[1050,4488,2749],{"class":1071},[1050,4490,4491],{"class":1829}," 0",[1050,4493,1536],{"class":1071},[1050,4495,4496,4498,4500,4502,4504,4506],{"class":1052,"line":1178},[1050,4497,4481],{"class":1355},[1050,4499,2795],{"class":1359},[1050,4501,1396],{"class":1355},[1050,4503,2749],{"class":1071},[1050,4505,4491],{"class":1829},[1050,4507,1536],{"class":1071},[1050,4509,4510,4512,4515,4517,4519],{"class":1052,"line":1208},[1050,4511,4481],{"class":1355},[1050,4513,4514],{"class":1359},"errors",[1050,4516,1396],{"class":1355},[1050,4518,2749],{"class":1071},[1050,4520,4521],{"class":1071}," []\n",[1050,4523,4524],{"class":1052,"line":1222},[1050,4525,4526],{"class":1071},"    }\n",[1050,4528,4529],{"class":1052,"line":1228},[1050,4530,1225],{"class":1067},[1050,4532,4533,4535,4537,4539,4541],{"class":1052,"line":1234},[1050,4534,1752],{"class":1063},[1050,4536,1755],{"class":1067},[1050,4538,1072],{"class":1071},[1050,4540,1760],{"class":1253},[1050,4542,1763],{"class":1071},[1050,4544,4545,4547,4550,4552,4555,4557,4561,4563,4565],{"class":1052,"line":1276},[1050,4546,1864],{"class":1063},[1050,4548,4549],{"class":1067}," i",[1050,4551,1123],{"class":1071},[1050,4553,4554],{"class":1067}," record ",[1050,4556,1870],{"class":1063},[1050,4558,4560],{"class":4559},"sJdAF"," enumerate",[1050,4562,1188],{"class":1071},[1050,4564,4451],{"class":1253},[1050,4566,1205],{"class":1071},[1050,4568,4569,4572],{"class":1052,"line":1309},[1050,4570,4571],{"class":1063},"            try",[1050,4573,1340],{"class":1071},[1050,4575,4576],{"class":1052,"line":1314},[1050,4577,4578],{"class":1056},"                # Create savepoint for each record\n",[1050,4580,4581,4583,4585,4587,4589],{"class":1052,"line":1320},[1050,4582,3740],{"class":1063},[1050,4584,1755],{"class":1067},[1050,4586,1072],{"class":1071},[1050,4588,1760],{"class":1253},[1050,4590,1763],{"class":1071},[1050,4592,4593,4596,4598,4601],{"class":1052,"line":1343},[1050,4594,4595],{"class":1253},"                    import_single_record",[1050,4597,1188],{"class":1071},[1050,4599,4600],{"class":1253},"record",[1050,4602,1273],{"class":1071},[1050,4604,4605,4608,4610,4612,4614,4616,4618,4621],{"class":1052,"line":1367},[1050,4606,4607],{"class":1067},"                    results",[1050,4609,1912],{"class":1071},[1050,4611,1396],{"class":1355},[1050,4613,4484],{"class":1359},[1050,4615,1396],{"class":1355},[1050,4617,3999],{"class":1071},[1050,4619,4620],{"class":1071}," +=",[1050,4622,4623],{"class":1829}," 1\n",[1050,4625,4626],{"class":1052,"line":1372},[1050,4627,4628],{"class":1067},"                    \n",[1050,4630,4631,4634,4636,4638,4640],{"class":1052,"line":1378},[1050,4632,4633],{"class":1063},"            except",[1050,4635,2889],{"class":1349},[1050,4637,2892],{"class":1063},[1050,4639,2895],{"class":1067},[1050,4641,1340],{"class":1071},[1050,4643,4644],{"class":1052,"line":1412},[1050,4645,4646],{"class":1056},"                # Savepoint is automatically rolled back\n",[1050,4648,4649,4652,4654,4656,4658,4660,4662,4664],{"class":1052,"line":1441},[1050,4650,4651],{"class":1067},"                results",[1050,4653,1912],{"class":1071},[1050,4655,1396],{"class":1355},[1050,4657,2795],{"class":1359},[1050,4659,1396],{"class":1355},[1050,4661,3999],{"class":1071},[1050,4663,4620],{"class":1071},[1050,4665,4623],{"class":1829},[1050,4667,4668,4670,4672,4674,4676,4678,4681,4684],{"class":1052,"line":1446},[1050,4669,4651],{"class":1067},[1050,4671,1912],{"class":1071},[1050,4673,1396],{"class":1355},[1050,4675,4514],{"class":1359},[1050,4677,1396],{"class":1355},[1050,4679,4680],{"class":1071},"].",[1050,4682,4683],{"class":1253},"append",[1050,4685,4686],{"class":1071},"({\n",[1050,4688,4689,4692,4695,4697,4699,4701],{"class":1052,"line":1473},[1050,4690,4691],{"class":1355},"                    '",[1050,4693,4694],{"class":1359},"record_index",[1050,4696,1396],{"class":1355},[1050,4698,2749],{"class":1071},[1050,4700,4549],{"class":1253},[1050,4702,1536],{"class":1071},[1050,4704,4705,4707,4709,4711,4713,4715,4717,4719],{"class":1052,"line":1496},[1050,4706,4691],{"class":1355},[1050,4708,2817],{"class":1359},[1050,4710,1396],{"class":1355},[1050,4712,2749],{"class":1071},[1050,4714,2933],{"class":1349},[1050,4716,1188],{"class":1071},[1050,4718,2938],{"class":1253},[1050,4720,4721],{"class":1071},"),\n",[1050,4723,4724,4726,4729,4731,4733],{"class":1052,"line":1501},[1050,4725,4691],{"class":1355},[1050,4727,4728],{"class":1359},"record_data",[1050,4730,1396],{"class":1355},[1050,4732,2749],{"class":1071},[1050,4734,4735],{"class":1253}," record\n",[1050,4737,4738],{"class":1052,"line":1507},[1050,4739,4740],{"class":1071},"                })\n",[1050,4742,4743],{"class":1052,"line":1525},[1050,4744,4745],{"class":1067},"                \n",[1050,4747,4748],{"class":1052,"line":1539},[1050,4749,4750],{"class":1056},"                # Continue with next record\n",[1050,4752,4753],{"class":1052,"line":1555},[1050,4754,4755],{"class":1063},"                continue\n",[1050,4757,4758],{"class":1052,"line":1572},[1050,4759,1225],{"class":1067},[1050,4761,4762,4764],{"class":1052,"line":1598},[1050,4763,1696],{"class":1063},[1050,4765,4766],{"class":1067}," results\n",[1050,4768,4769],{"class":1052,"line":1604},[1050,4770,1154],{"emptyLinePlaceholder":1153},[1050,4772,4773,4775,4778,4780,4782],{"class":1052,"line":1609},[1050,4774,1182],{"class":1181},[1050,4776,4777],{"class":1169}," import_single_record",[1050,4779,1188],{"class":1071},[1050,4781,4728],{"class":1191},[1050,4783,1205],{"class":1071},[1050,4785,4786,4788,4791],{"class":1052,"line":1624},[1050,4787,1212],{"class":1211},[1050,4789,4790],{"class":1215},"Import a single record with validation",[1050,4792,1219],{"class":1211},[1050,4794,4795],{"class":1052,"line":1636},[1050,4796,1225],{"class":1067},[1050,4798,4799],{"class":1052,"line":1647},[1050,4800,4801],{"class":1056},"    # Validate required fields\n",[1050,4803,4804,4806,4809,4812,4814,4816,4818,4820,4823,4825],{"class":1052,"line":1663},[1050,4805,1323],{"class":1063},[1050,4807,4808],{"class":1334}," not",[1050,4810,4811],{"class":1067}," record_data",[1050,4813,1072],{"class":1071},[1050,4815,1260],{"class":1253},[1050,4817,1188],{"class":1071},[1050,4819,1396],{"class":1355},[1050,4821,4822],{"class":1359},"email",[1050,4824,1396],{"class":1355},[1050,4826,1205],{"class":1071},[1050,4828,4829,4831,4833,4835,4837,4840,4842],{"class":1052,"line":1683},[1050,4830,1346],{"class":1063},[1050,4832,1350],{"class":1349},[1050,4834,1188],{"class":1071},[1050,4836,1356],{"class":1355},[1050,4838,4839],{"class":1359},"Email is required",[1050,4841,1356],{"class":1355},[1050,4843,1273],{"class":1071},[1050,4845,4846],{"class":1052,"line":1688},[1050,4847,1225],{"class":1067},[1050,4849,4850],{"class":1052,"line":1693},[1050,4851,4852],{"class":1056},"    # Check for duplicates\n",[1050,4854,4855,4857,4859,4861,4863,4865,4867,4869,4871,4873,4875,4877,4879,4881,4883,4886,4889],{"class":1052,"line":1703},[1050,4856,1323],{"class":1063},[1050,4858,3519],{"class":1067},[1050,4860,1072],{"class":1071},[1050,4862,1248],{"class":1247},[1050,4864,1072],{"class":1071},[1050,4866,3154],{"class":1253},[1050,4868,1188],{"class":1071},[1050,4870,4822],{"class":1265},[1050,4872,1240],{"class":1071},[1050,4874,4728],{"class":1253},[1050,4876,1912],{"class":1071},[1050,4878,1396],{"class":1355},[1050,4880,4822],{"class":1359},[1050,4882,1396],{"class":1355},[1050,4884,4885],{"class":1071},"]).",[1050,4887,4888],{"class":1253},"exists",[1050,4890,1763],{"class":1071},[1050,4892,4893,4895,4897,4899,4901,4904,4906,4908,4910,4912,4914,4916,4918,4920,4923],{"class":1052,"line":1708},[1050,4894,1346],{"class":1063},[1050,4896,1350],{"class":1349},[1050,4898,1188],{"class":1071},[1050,4900,1580],{"class":1181},[1050,4902,4903],{"class":1359},"\"User with email ",[1050,4905,1587],{"class":1586},[1050,4907,4728],{"class":1253},[1050,4909,1912],{"class":1071},[1050,4911,1396],{"class":1355},[1050,4913,4822],{"class":1359},[1050,4915,1396],{"class":1355},[1050,4917,3999],{"class":1071},[1050,4919,1592],{"class":1586},[1050,4921,4922],{"class":1359}," already exists\"",[1050,4924,1273],{"class":1071},[1050,4926,4927],{"class":1052,"line":1714},[1050,4928,1225],{"class":1067},[1050,4930,4931],{"class":1052,"line":1734},[1050,4932,4933],{"class":1056},"    # Create user\n",[1050,4935,4936,4939,4941,4943,4945,4947,4949,4951],{"class":1052,"line":1744},[1050,4937,4938],{"class":1067},"    user ",[1050,4940,1240],{"class":1071},[1050,4942,3519],{"class":1067},[1050,4944,1072],{"class":1071},[1050,4946,1248],{"class":1247},[1050,4948,1072],{"class":1071},[1050,4950,1519],{"class":1253},[1050,4952,1522],{"class":1071},[1050,4954,4955,4958,4960,4962,4964,4966,4969,4971],{"class":1052,"line":1749},[1050,4956,4957],{"class":1265},"        username",[1050,4959,1240],{"class":1071},[1050,4961,4728],{"class":1253},[1050,4963,1912],{"class":1071},[1050,4965,1396],{"class":1355},[1050,4967,4968],{"class":1359},"username",[1050,4970,1396],{"class":1355},[1050,4972,2080],{"class":1071},[1050,4974,4975,4978,4980,4982,4984,4986,4988,4990],{"class":1052,"line":1766},[1050,4976,4977],{"class":1265},"        email",[1050,4979,1240],{"class":1071},[1050,4981,4728],{"class":1253},[1050,4983,1912],{"class":1071},[1050,4985,1396],{"class":1355},[1050,4987,4822],{"class":1359},[1050,4989,1396],{"class":1355},[1050,4991,2080],{"class":1071},[1050,4993,4994,4997,4999,5001,5003,5005,5007,5009,5012,5014,5016,5019],{"class":1052,"line":1772},[1050,4995,4996],{"class":1265},"        first_name",[1050,4998,1240],{"class":1071},[1050,5000,4728],{"class":1253},[1050,5002,1072],{"class":1071},[1050,5004,1260],{"class":1253},[1050,5006,1188],{"class":1071},[1050,5008,1396],{"class":1355},[1050,5010,5011],{"class":1359},"first_name",[1050,5013,1396],{"class":1355},[1050,5015,1123],{"class":1071},[1050,5017,5018],{"class":1355}," ''",[1050,5020,4721],{"class":1071},[1050,5022,5023,5026,5028,5030,5032,5034,5036,5038,5041,5043,5045,5047],{"class":1052,"line":1792},[1050,5024,5025],{"class":1265},"        last_name",[1050,5027,1240],{"class":1071},[1050,5029,4728],{"class":1253},[1050,5031,1072],{"class":1071},[1050,5033,1260],{"class":1253},[1050,5035,1188],{"class":1071},[1050,5037,1396],{"class":1355},[1050,5039,5040],{"class":1359},"last_name",[1050,5042,1396],{"class":1355},[1050,5044,1123],{"class":1071},[1050,5046,5018],{"class":1355},[1050,5048,1273],{"class":1071},[1050,5050,5051],{"class":1052,"line":1804},[1050,5052,1601],{"class":1071},[1050,5054,5055],{"class":1052,"line":1821},[1050,5056,1225],{"class":1067},[1050,5058,5059],{"class":1052,"line":1833},[1050,5060,5061],{"class":1056},"    # Create profile\n",[1050,5063,5064,5067,5069,5071,5073,5075],{"class":1052,"line":1839},[1050,5065,5066],{"class":1067},"    UserProfile",[1050,5068,1072],{"class":1071},[1050,5070,1248],{"class":1247},[1050,5072,1072],{"class":1071},[1050,5074,1519],{"class":1253},[1050,5076,1522],{"class":1071},[1050,5078,5079,5081,5083,5085],{"class":1052,"line":1845},[1050,5080,4284],{"class":1265},[1050,5082,1240],{"class":1071},[1050,5084,2471],{"class":1253},[1050,5086,1536],{"class":1071},[1050,5088,5089,5092,5094,5096,5098,5100,5102,5104,5107,5109,5111,5113],{"class":1052,"line":1856},[1050,5090,5091],{"class":1265},"        phone",[1050,5093,1240],{"class":1071},[1050,5095,4728],{"class":1253},[1050,5097,1072],{"class":1071},[1050,5099,1260],{"class":1253},[1050,5101,1188],{"class":1071},[1050,5103,1396],{"class":1355},[1050,5105,5106],{"class":1359},"phone",[1050,5108,1396],{"class":1355},[1050,5110,1123],{"class":1071},[1050,5112,5018],{"class":1355},[1050,5114,4721],{"class":1071},[1050,5116,5117,5120,5122,5124,5126,5128,5130,5132,5135,5137,5139,5141],{"class":1052,"line":1861},[1050,5118,5119],{"class":1265},"        address",[1050,5121,1240],{"class":1071},[1050,5123,4728],{"class":1253},[1050,5125,1072],{"class":1071},[1050,5127,1260],{"class":1253},[1050,5129,1188],{"class":1071},[1050,5131,1396],{"class":1355},[1050,5133,5134],{"class":1359},"address",[1050,5136,1396],{"class":1355},[1050,5138,1123],{"class":1071},[1050,5140,5018],{"class":1355},[1050,5142,1273],{"class":1071},[1050,5144,5145],{"class":1052,"line":1877},[1050,5146,1601],{"class":1071},[1050,5148,5149],{"class":1052,"line":1901},[1050,5150,1225],{"class":1067},[1050,5152,5153,5155],{"class":1052,"line":1925},[1050,5154,1696],{"class":1063},[1050,5156,5157],{"class":1067}," user\n",[1050,5159,5160],{"class":1052,"line":1931},[1050,5161,1154],{"emptyLinePlaceholder":1153},[1050,5163,5164],{"class":1052,"line":1937},[1050,5165,5166],{"class":1056},"# Manual savepoint management\n",[1050,5168,5169,5171,5174],{"class":1052,"line":1943},[1050,5170,1182],{"class":1181},[1050,5172,5173],{"class":1169}," advanced_savepoint_usage",[1050,5175,1763],{"class":1071},[1050,5177,5178,5180,5183],{"class":1052,"line":1974},[1050,5179,1212],{"class":1211},[1050,5181,5182],{"class":1215},"Advanced savepoint management",[1050,5184,1219],{"class":1211},[1050,5186,5187],{"class":1052,"line":2005},[1050,5188,1225],{"class":1067},[1050,5190,5191,5193,5195,5197,5199],{"class":1052,"line":2010},[1050,5192,1752],{"class":1063},[1050,5194,1755],{"class":1067},[1050,5196,1072],{"class":1071},[1050,5198,1760],{"class":1253},[1050,5200,1763],{"class":1071},[1050,5202,5203],{"class":1052,"line":2016},[1050,5204,5205],{"class":1056},"        # Main transaction work\n",[1050,5207,5208,5211,5213,5216,5218,5220,5222,5224,5226,5228,5230,5232,5235,5237],{"class":1052,"line":2037},[1050,5209,5210],{"class":1067},"        main_record ",[1050,5212,1240],{"class":1071},[1050,5214,5215],{"class":1067}," MainModel",[1050,5217,1072],{"class":1071},[1050,5219,1248],{"class":1247},[1050,5221,1072],{"class":1071},[1050,5223,1519],{"class":1253},[1050,5225,1188],{"class":1071},[1050,5227,1996],{"class":1265},[1050,5229,1240],{"class":1071},[1050,5231,1396],{"class":1355},[1050,5233,5234],{"class":1359},"Main Record",[1050,5236,1396],{"class":1355},[1050,5238,1273],{"class":1071},[1050,5240,5241],{"class":1052,"line":2050},[1050,5242,1842],{"class":1067},[1050,5244,5245],{"class":1052,"line":2062},[1050,5246,5247],{"class":1056},"        # Create manual savepoint\n",[1050,5249,5250,5253,5255,5257,5259,5262],{"class":1052,"line":2083},[1050,5251,5252],{"class":1067},"        savepoint_id ",[1050,5254,1240],{"class":1071},[1050,5256,1755],{"class":1067},[1050,5258,1072],{"class":1071},[1050,5260,5261],{"class":1253},"savepoint",[1050,5263,2633],{"class":1071},[1050,5265,5266],{"class":1052,"line":2098},[1050,5267,1842],{"class":1067},[1050,5269,5270,5272],{"class":1052,"line":2103},[1050,5271,3634],{"class":1063},[1050,5273,1340],{"class":1071},[1050,5275,5276],{"class":1052,"line":2108},[1050,5277,5278],{"class":1056},"            # Risky operation\n",[1050,5280,5281,5284,5286,5289],{"class":1052,"line":2114},[1050,5282,5283],{"class":1253},"            risky_operation",[1050,5285,1188],{"class":1071},[1050,5287,5288],{"class":1253},"main_record",[1050,5290,1273],{"class":1071},[1050,5292,5293],{"class":1052,"line":2152},[1050,5294,1934],{"class":1067},[1050,5296,5297],{"class":1052,"line":2175},[1050,5298,5299],{"class":1056},"            # If successful, release savepoint\n",[1050,5301,5302,5305,5307,5310,5312,5315],{"class":1052,"line":2180},[1050,5303,5304],{"class":1067},"            transaction",[1050,5306,1072],{"class":1071},[1050,5308,5309],{"class":1253},"savepoint_commit",[1050,5311,1188],{"class":1071},[1050,5313,5314],{"class":1253},"savepoint_id",[1050,5316,1273],{"class":1071},[1050,5318,5319],{"class":1052,"line":2206},[1050,5320,1934],{"class":1067},[1050,5322,5323,5325,5327,5329,5331],{"class":1052,"line":2211},[1050,5324,3875],{"class":1063},[1050,5326,2889],{"class":1349},[1050,5328,2892],{"class":1063},[1050,5330,2895],{"class":1067},[1050,5332,1340],{"class":1071},[1050,5334,5335],{"class":1052,"line":2217},[1050,5336,5337],{"class":1056},"            # Rollback to savepoint\n",[1050,5339,5340,5342,5344,5347,5349,5351],{"class":1052,"line":2233},[1050,5341,5304],{"class":1067},[1050,5343,1072],{"class":1071},[1050,5345,5346],{"class":1253},"savepoint_rollback",[1050,5348,1188],{"class":1071},[1050,5350,5314],{"class":1253},[1050,5352,1273],{"class":1071},[1050,5354,5355],{"class":1052,"line":2256},[1050,5356,1934],{"class":1067},[1050,5358,5359],{"class":1052,"line":2261},[1050,5360,5361],{"class":1056},"            # Log error but continue\n",[1050,5363,5365,5368,5370,5372,5374,5376],{"class":1052,"line":5364},85,[1050,5366,5367],{"class":1067},"            ErrorLog",[1050,5369,1072],{"class":1071},[1050,5371,1248],{"class":1247},[1050,5373,1072],{"class":1071},[1050,5375,1519],{"class":1253},[1050,5377,1522],{"class":1071},[1050,5379,5381,5384,5386,5388],{"class":1052,"line":5380},86,[1050,5382,5383],{"class":1265},"                related_object",[1050,5385,1240],{"class":1071},[1050,5387,5288],{"class":1253},[1050,5389,1536],{"class":1071},[1050,5391,5393,5396,5398,5401,5403,5405],{"class":1052,"line":5392},87,[1050,5394,5395],{"class":1265},"                error_message",[1050,5397,1240],{"class":1071},[1050,5399,5400],{"class":1349},"str",[1050,5402,1188],{"class":1071},[1050,5404,2938],{"class":1253},[1050,5406,1273],{"class":1071},[1050,5408,5410],{"class":1052,"line":5409},88,[1050,5411,1928],{"class":1071},[1050,5413,5415],{"class":1052,"line":5414},89,[1050,5416,1842],{"class":1067},[1050,5418,5420],{"class":1052,"line":5419},90,[1050,5421,5422],{"class":1056},"        # Continue with other operations\n",[1050,5424,5426,5429,5431,5433],{"class":1052,"line":5425},91,[1050,5427,5428],{"class":1253},"        additional_operations",[1050,5430,1188],{"class":1071},[1050,5432,5288],{"class":1253},[1050,5434,1273],{"class":1071},[1030,5436,5438],{"id":5437},"transaction-isolation-and-locking","Transaction Isolation and Locking",[1035,5440,5442],{"id":5441},"select-for-update","Select for Update",[1040,5444,5446],{"className":1042,"code":5445,"language":1044,"meta":1045,"style":1045},"from django.db import transaction\nfrom django.db.models import F\n\ndef concurrent_safe_operations():\n    \"\"\"Handle concurrent access safely\"\"\"\n    \n    @transaction.atomic\n    def reserve_inventory(product_id, quantity):\n        \"\"\"Reserve inventory with row-level locking\"\"\"\n        \n        # Lock the product row to prevent concurrent modifications\n        product = Product.objects.select_for_update().get(id=product_id)\n        \n        if product.available_quantity \u003C quantity:\n            raise ValueError(\"Insufficient inventory\")\n        \n        # Update inventory atomically\n        product.available_quantity = F('available_quantity') - quantity\n        product.reserved_quantity = F('reserved_quantity') + quantity\n        product.save()\n        \n        # Create reservation record\n        reservation = InventoryReservation.objects.create(\n            product=product,\n            quantity=quantity,\n            expires_at=timezone.now() + timedelta(minutes=15)\n        )\n        \n        return reservation\n    \n    @transaction.atomic\n    def process_concurrent_orders(order_data_list):\n        \"\"\"Process multiple orders concurrently with proper locking\"\"\"\n        \n        # Group orders by product to minimize lock contention\n        orders_by_product = {}\n        for order_data in order_data_list:\n            product_id = order_data['product_id']\n            if product_id not in orders_by_product:\n                orders_by_product[product_id] = []\n            orders_by_product[product_id].append(order_data)\n        \n        # Process orders for each product\n        for product_id, orders in orders_by_product.items():\n            # Lock product once for all orders\n            product = Product.objects.select_for_update().get(id=product_id)\n            \n            total_quantity = sum(order['quantity'] for order in orders)\n            \n            if product.stock_quantity \u003C total_quantity:\n                raise ValueError(f\"Insufficient stock for product {product.name}\")\n            \n            # Process all orders for this product\n            for order_data in orders:\n                create_order_item(product, order_data)\n            \n            # Update stock once\n            product.stock_quantity = F('stock_quantity') - total_quantity\n            product.save()\n\n# Different locking strategies\ndef locking_strategies_examples():\n    \"\"\"Examples of different locking strategies\"\"\"\n    \n    # Standard select_for_update (exclusive lock)\n    def exclusive_lock_example():\n        with transaction.atomic():\n            account = Account.objects.select_for_update().get(id=1)\n            # Other transactions will wait\n            account.balance = F('balance') + 100\n            account.save()\n    \n    # Select for update with NOWAIT (fail fast)\n    def nowait_lock_example():\n        try:\n            with transaction.atomic():\n                account = Account.objects.select_for_update(nowait=True).get(id=1)\n                account.balance = F('balance') + 100\n                account.save()\n        except DatabaseError:\n            # Handle lock acquisition failure\n            return \"Resource is busy, try again later\"\n    \n    # Select for update with SKIP LOCKED\n    def skip_locked_example():\n        \"\"\"Process available records, skip locked ones\"\"\"\n        with transaction.atomic():\n            # Get unlocked pending orders\n            pending_orders = Order.objects.select_for_update(\n                skip_locked=True\n            ).filter(status='pending')[:10]\n            \n            for order in pending_orders:\n                process_order(order)\n    \n    # Shared lock (PostgreSQL)\n    def shared_lock_example():\n        with transaction.atomic():\n            # Multiple readers can acquire shared locks\n            products = Product.objects.select_for_update(\n                of=('self',)  # PostgreSQL specific\n            ).filter(category_id=1)\n            \n            # Read operations are allowed by other transactions\n            return list(products.values('name', 'price'))\n",[1047,5447,5448,5462,5480,5484,5493,5502,5506,5516,5534,5543,5547,5552,5582,5586,5603,5620,5624,5629,5656,5683,5693,5697,5702,5722,5732,5742,5777,5781,5785,5792,5796,5806,5820,5829,5833,5838,5848,5862,5882,5900,5915,5935,5939,5944,5967,5972,6002,6006,6043,6047,6064,6091,6095,6100,6112,6127,6131,6136,6163,6173,6177,6182,6191,6200,6204,6209,6218,6231,6263,6268,6296,6306,6310,6315,6324,6330,6343,6385,6412,6422,6431,6436,6449,6453,6458,6467,6476,6488,6493,6512,6522,6549,6554,6568,6580,6585,6591,6601,6614,6620,6640,6661,6679,6684,6690],{"__ignoreMap":1045},[1050,5449,5450,5452,5454,5456,5458,5460],{"class":1052,"line":1053},[1050,5451,1064],{"class":1063},[1050,5453,1068],{"class":1067},[1050,5455,1072],{"class":1071},[1050,5457,1075],{"class":1067},[1050,5459,1078],{"class":1063},[1050,5461,1081],{"class":1067},[1050,5463,5464,5466,5468,5470,5472,5474,5476,5478],{"class":1052,"line":1060},[1050,5465,1064],{"class":1063},[1050,5467,1068],{"class":1067},[1050,5469,1072],{"class":1071},[1050,5471,1093],{"class":1067},[1050,5473,1072],{"class":1071},[1050,5475,1098],{"class":1067},[1050,5477,1078],{"class":1063},[1050,5479,1103],{"class":1067},[1050,5481,5482],{"class":1052,"line":1084},[1050,5483,1154],{"emptyLinePlaceholder":1153},[1050,5485,5486,5488,5491],{"class":1052,"line":1106},[1050,5487,1182],{"class":1181},[1050,5489,5490],{"class":1169}," concurrent_safe_operations",[1050,5492,1763],{"class":1071},[1050,5494,5495,5497,5500],{"class":1052,"line":1150},[1050,5496,1212],{"class":1211},[1050,5498,5499],{"class":1215},"Handle concurrent access safely",[1050,5501,1219],{"class":1211},[1050,5503,5504],{"class":1052,"line":1157},[1050,5505,1225],{"class":1067},[1050,5507,5508,5510,5512,5514],{"class":1052,"line":1163},[1050,5509,3010],{"class":1071},[1050,5511,1170],{"class":1169},[1050,5513,1072],{"class":1071},[1050,5515,1175],{"class":1169},[1050,5517,5518,5520,5523,5525,5527,5529,5532],{"class":1052,"line":1178},[1050,5519,3021],{"class":1181},[1050,5521,5522],{"class":1169}," reserve_inventory",[1050,5524,1188],{"class":1071},[1050,5526,1917],{"class":1191},[1050,5528,1123],{"class":1071},[1050,5530,5531],{"class":1191}," quantity",[1050,5533,1205],{"class":1071},[1050,5535,5536,5538,5541],{"class":1052,"line":1208},[1050,5537,3042],{"class":1211},[1050,5539,5540],{"class":1215},"Reserve inventory with row-level locking",[1050,5542,1219],{"class":1211},[1050,5544,5545],{"class":1052,"line":1222},[1050,5546,1842],{"class":1067},[1050,5548,5549],{"class":1052,"line":1228},[1050,5550,5551],{"class":1056},"        # Lock the product row to prevent concurrent modifications\n",[1050,5553,5554,5556,5558,5560,5562,5564,5566,5568,5570,5572,5574,5576,5578,5580],{"class":1052,"line":1234},[1050,5555,4016],{"class":1067},[1050,5557,1240],{"class":1071},[1050,5559,1137],{"class":1067},[1050,5561,1072],{"class":1071},[1050,5563,1248],{"class":1247},[1050,5565,1072],{"class":1071},[1050,5567,1254],{"class":1253},[1050,5569,1257],{"class":1071},[1050,5571,1260],{"class":1253},[1050,5573,1188],{"class":1071},[1050,5575,1266],{"class":1265},[1050,5577,1240],{"class":1071},[1050,5579,1917],{"class":1253},[1050,5581,1273],{"class":1071},[1050,5583,5584],{"class":1052,"line":1276},[1050,5585,1842],{"class":1067},[1050,5587,5588,5590,5592,5594,5597,5599,5601],{"class":1052,"line":1309},[1050,5589,2564],{"class":1063},[1050,5591,1949],{"class":1067},[1050,5593,1072],{"class":1071},[1050,5595,5596],{"class":1247},"available_quantity",[1050,5598,1335],{"class":1334},[1050,5600,5531],{"class":1067},[1050,5602,1340],{"class":1071},[1050,5604,5605,5607,5609,5611,5613,5616,5618],{"class":1052,"line":1314},[1050,5606,4084],{"class":1063},[1050,5608,1350],{"class":1349},[1050,5610,1188],{"class":1071},[1050,5612,1356],{"class":1355},[1050,5614,5615],{"class":1359},"Insufficient inventory",[1050,5617,1356],{"class":1355},[1050,5619,1273],{"class":1071},[1050,5621,5622],{"class":1052,"line":1320},[1050,5623,1842],{"class":1067},[1050,5625,5626],{"class":1052,"line":1343},[1050,5627,5628],{"class":1056},"        # Update inventory atomically\n",[1050,5630,5631,5633,5635,5637,5639,5641,5643,5645,5647,5649,5651,5653],{"class":1052,"line":1367},[1050,5632,4200],{"class":1067},[1050,5634,1072],{"class":1071},[1050,5636,5596],{"class":1247},[1050,5638,1388],{"class":1071},[1050,5640,1391],{"class":1253},[1050,5642,1188],{"class":1071},[1050,5644,1396],{"class":1355},[1050,5646,5596],{"class":1359},[1050,5648,1396],{"class":1355},[1050,5650,1403],{"class":1071},[1050,5652,1406],{"class":1334},[1050,5654,5655],{"class":1067}," quantity\n",[1050,5657,5658,5660,5662,5665,5667,5669,5671,5673,5675,5677,5679,5681],{"class":1052,"line":1372},[1050,5659,4200],{"class":1067},[1050,5661,1072],{"class":1071},[1050,5663,5664],{"class":1247},"reserved_quantity",[1050,5666,1388],{"class":1071},[1050,5668,1391],{"class":1253},[1050,5670,1188],{"class":1071},[1050,5672,1396],{"class":1355},[1050,5674,5664],{"class":1359},[1050,5676,1396],{"class":1355},[1050,5678,1403],{"class":1071},[1050,5680,1436],{"class":1334},[1050,5682,5655],{"class":1067},[1050,5684,5685,5687,5689,5691],{"class":1052,"line":1378},[1050,5686,4200],{"class":1067},[1050,5688,1072],{"class":1071},[1050,5690,1453],{"class":1253},[1050,5692,2633],{"class":1071},[1050,5694,5695],{"class":1052,"line":1412},[1050,5696,1842],{"class":1067},[1050,5698,5699],{"class":1052,"line":1441},[1050,5700,5701],{"class":1056},"        # Create reservation record\n",[1050,5703,5704,5707,5709,5712,5714,5716,5718,5720],{"class":1052,"line":1446},[1050,5705,5706],{"class":1067},"        reservation ",[1050,5708,1240],{"class":1071},[1050,5710,5711],{"class":1067}," InventoryReservation",[1050,5713,1072],{"class":1071},[1050,5715,1248],{"class":1247},[1050,5717,1072],{"class":1071},[1050,5719,1519],{"class":1253},[1050,5721,1522],{"class":1071},[1050,5723,5724,5726,5728,5730],{"class":1052,"line":1473},[1050,5725,2117],{"class":1265},[1050,5727,1240],{"class":1071},[1050,5729,1991],{"class":1253},[1050,5731,1536],{"class":1071},[1050,5733,5734,5736,5738,5740],{"class":1052,"line":1496},[1050,5735,4155],{"class":1265},[1050,5737,1240],{"class":1071},[1050,5739,1966],{"class":1253},[1050,5741,1536],{"class":1071},[1050,5743,5744,5747,5749,5752,5754,5757,5760,5762,5765,5767,5770,5772,5775],{"class":1052,"line":1501},[1050,5745,5746],{"class":1265},"            expires_at",[1050,5748,1240],{"class":1071},[1050,5750,5751],{"class":1253},"timezone",[1050,5753,1072],{"class":1071},[1050,5755,5756],{"class":1253},"now",[1050,5758,5759],{"class":1071},"()",[1050,5761,1436],{"class":1334},[1050,5763,5764],{"class":1253}," timedelta",[1050,5766,1188],{"class":1071},[1050,5768,5769],{"class":1265},"minutes",[1050,5771,1240],{"class":1071},[1050,5773,5774],{"class":1829},"15",[1050,5776,1273],{"class":1071},[1050,5778,5779],{"class":1052,"line":1507},[1050,5780,1836],{"class":1071},[1050,5782,5783],{"class":1052,"line":1525},[1050,5784,1842],{"class":1067},[1050,5786,5787,5789],{"class":1052,"line":1539},[1050,5788,2264],{"class":1063},[1050,5790,5791],{"class":1067}," reservation\n",[1050,5793,5794],{"class":1052,"line":1555},[1050,5795,1225],{"class":1067},[1050,5797,5798,5800,5802,5804],{"class":1052,"line":1572},[1050,5799,3010],{"class":1071},[1050,5801,1170],{"class":1169},[1050,5803,1072],{"class":1071},[1050,5805,1175],{"class":1169},[1050,5807,5808,5810,5813,5815,5818],{"class":1052,"line":1598},[1050,5809,3021],{"class":1181},[1050,5811,5812],{"class":1169}," process_concurrent_orders",[1050,5814,1188],{"class":1071},[1050,5816,5817],{"class":1191},"order_data_list",[1050,5819,1205],{"class":1071},[1050,5821,5822,5824,5827],{"class":1052,"line":1604},[1050,5823,3042],{"class":1211},[1050,5825,5826],{"class":1215},"Process multiple orders concurrently with proper locking",[1050,5828,1219],{"class":1211},[1050,5830,5831],{"class":1052,"line":1609},[1050,5832,1842],{"class":1067},[1050,5834,5835],{"class":1052,"line":1624},[1050,5836,5837],{"class":1056},"        # Group orders by product to minimize lock contention\n",[1050,5839,5840,5843,5845],{"class":1052,"line":1636},[1050,5841,5842],{"class":1067},"        orders_by_product ",[1050,5844,1240],{"class":1071},[1050,5846,5847],{"class":1071}," {}\n",[1050,5849,5850,5852,5855,5857,5860],{"class":1052,"line":1647},[1050,5851,1864],{"class":1063},[1050,5853,5854],{"class":1067}," order_data ",[1050,5856,1870],{"class":1063},[1050,5858,5859],{"class":1067}," order_data_list",[1050,5861,1340],{"class":1071},[1050,5863,5864,5867,5869,5872,5874,5876,5878,5880],{"class":1052,"line":1663},[1050,5865,5866],{"class":1067},"            product_id ",[1050,5868,1240],{"class":1071},[1050,5870,5871],{"class":1067}," order_data",[1050,5873,1912],{"class":1071},[1050,5875,1396],{"class":1355},[1050,5877,1917],{"class":1359},[1050,5879,1396],{"class":1355},[1050,5881,1922],{"class":1071},[1050,5883,5884,5886,5889,5892,5895,5898],{"class":1052,"line":1683},[1050,5885,1946],{"class":1063},[1050,5887,5888],{"class":1067}," product_id ",[1050,5890,5891],{"class":1334},"not",[1050,5893,5894],{"class":1334}," in",[1050,5896,5897],{"class":1067}," orders_by_product",[1050,5899,1340],{"class":1071},[1050,5901,5902,5905,5907,5909,5911,5913],{"class":1052,"line":1688},[1050,5903,5904],{"class":1067},"                orders_by_product",[1050,5906,1912],{"class":1071},[1050,5908,1917],{"class":1067},[1050,5910,3999],{"class":1071},[1050,5912,1388],{"class":1071},[1050,5914,4521],{"class":1071},[1050,5916,5917,5920,5922,5924,5926,5928,5930,5933],{"class":1052,"line":1693},[1050,5918,5919],{"class":1067},"            orders_by_product",[1050,5921,1912],{"class":1071},[1050,5923,1917],{"class":1067},[1050,5925,4680],{"class":1071},[1050,5927,4683],{"class":1253},[1050,5929,1188],{"class":1071},[1050,5931,5932],{"class":1253},"order_data",[1050,5934,1273],{"class":1071},[1050,5936,5937],{"class":1052,"line":1703},[1050,5938,1842],{"class":1067},[1050,5940,5941],{"class":1052,"line":1708},[1050,5942,5943],{"class":1056},"        # Process orders for each product\n",[1050,5945,5946,5948,5951,5953,5956,5958,5960,5962,5965],{"class":1052,"line":1714},[1050,5947,1864],{"class":1063},[1050,5949,5950],{"class":1067}," product_id",[1050,5952,1123],{"class":1071},[1050,5954,5955],{"class":1067}," orders ",[1050,5957,1870],{"class":1063},[1050,5959,5897],{"class":1067},[1050,5961,1072],{"class":1071},[1050,5963,5964],{"class":1253},"items",[1050,5966,1763],{"class":1071},[1050,5968,5969],{"class":1052,"line":1734},[1050,5970,5971],{"class":1056},"            # Lock product once for all orders\n",[1050,5973,5974,5976,5978,5980,5982,5984,5986,5988,5990,5992,5994,5996,5998,6000],{"class":1052,"line":1744},[1050,5975,1880],{"class":1067},[1050,5977,1240],{"class":1071},[1050,5979,1137],{"class":1067},[1050,5981,1072],{"class":1071},[1050,5983,1248],{"class":1247},[1050,5985,1072],{"class":1071},[1050,5987,1254],{"class":1253},[1050,5989,1257],{"class":1071},[1050,5991,1260],{"class":1253},[1050,5993,1188],{"class":1071},[1050,5995,1266],{"class":1265},[1050,5997,1240],{"class":1071},[1050,5999,1917],{"class":1253},[1050,6001,1273],{"class":1071},[1050,6003,6004],{"class":1052,"line":1749},[1050,6005,1934],{"class":1067},[1050,6007,6008,6011,6013,6016,6018,6020,6022,6024,6026,6028,6030,6033,6036,6038,6041],{"class":1052,"line":1766},[1050,6009,6010],{"class":1067},"            total_quantity ",[1050,6012,1240],{"class":1071},[1050,6014,6015],{"class":4559}," sum",[1050,6017,1188],{"class":1071},[1050,6019,2045],{"class":1253},[1050,6021,1912],{"class":1071},[1050,6023,1396],{"class":1355},[1050,6025,1966],{"class":1359},[1050,6027,1396],{"class":1355},[1050,6029,3999],{"class":1071},[1050,6031,6032],{"class":1063}," for",[1050,6034,6035],{"class":1253}," order ",[1050,6037,1870],{"class":1063},[1050,6039,6040],{"class":1253}," orders",[1050,6042,1273],{"class":1071},[1050,6044,6045],{"class":1052,"line":1772},[1050,6046,1934],{"class":1067},[1050,6048,6049,6051,6053,6055,6057,6059,6062],{"class":1052,"line":1792},[1050,6050,1946],{"class":1063},[1050,6052,1949],{"class":1067},[1050,6054,1072],{"class":1071},[1050,6056,1954],{"class":1247},[1050,6058,1335],{"class":1334},[1050,6060,6061],{"class":1067}," total_quantity",[1050,6063,1340],{"class":1071},[1050,6065,6066,6068,6070,6072,6074,6077,6079,6081,6083,6085,6087,6089],{"class":1052,"line":1804},[1050,6067,1977],{"class":1063},[1050,6069,1350],{"class":1349},[1050,6071,1188],{"class":1071},[1050,6073,1580],{"class":1181},[1050,6075,6076],{"class":1359},"\"Insufficient stock for product ",[1050,6078,1587],{"class":1586},[1050,6080,1991],{"class":1253},[1050,6082,1072],{"class":1071},[1050,6084,1996],{"class":1247},[1050,6086,1592],{"class":1586},[1050,6088,1356],{"class":1359},[1050,6090,1273],{"class":1071},[1050,6092,6093],{"class":1052,"line":1821},[1050,6094,1934],{"class":1067},[1050,6096,6097],{"class":1052,"line":1833},[1050,6098,6099],{"class":1056},"            # Process all orders for this product\n",[1050,6101,6102,6104,6106,6108,6110],{"class":1052,"line":1839},[1050,6103,3712],{"class":1063},[1050,6105,5854],{"class":1067},[1050,6107,1870],{"class":1063},[1050,6109,6040],{"class":1067},[1050,6111,1340],{"class":1071},[1050,6113,6114,6117,6119,6121,6123,6125],{"class":1052,"line":1845},[1050,6115,6116],{"class":1253},"                create_order_item",[1050,6118,1188],{"class":1071},[1050,6120,1991],{"class":1253},[1050,6122,1123],{"class":1071},[1050,6124,5871],{"class":1253},[1050,6126,1273],{"class":1071},[1050,6128,6129],{"class":1052,"line":1856},[1050,6130,1934],{"class":1067},[1050,6132,6133],{"class":1052,"line":1861},[1050,6134,6135],{"class":1056},"            # Update stock once\n",[1050,6137,6138,6140,6142,6144,6146,6148,6150,6152,6154,6156,6158,6160],{"class":1052,"line":1877},[1050,6139,2117],{"class":1067},[1050,6141,1072],{"class":1071},[1050,6143,1954],{"class":1247},[1050,6145,1388],{"class":1071},[1050,6147,1391],{"class":1253},[1050,6149,1188],{"class":1071},[1050,6151,1396],{"class":1355},[1050,6153,1954],{"class":1359},[1050,6155,1396],{"class":1355},[1050,6157,1403],{"class":1071},[1050,6159,1406],{"class":1334},[1050,6161,6162],{"class":1067}," total_quantity\n",[1050,6164,6165,6167,6169,6171],{"class":1052,"line":1901},[1050,6166,2117],{"class":1067},[1050,6168,1072],{"class":1071},[1050,6170,1453],{"class":1253},[1050,6172,2633],{"class":1071},[1050,6174,6175],{"class":1052,"line":1925},[1050,6176,1154],{"emptyLinePlaceholder":1153},[1050,6178,6179],{"class":1052,"line":1931},[1050,6180,6181],{"class":1056},"# Different locking strategies\n",[1050,6183,6184,6186,6189],{"class":1052,"line":1937},[1050,6185,1182],{"class":1181},[1050,6187,6188],{"class":1169}," locking_strategies_examples",[1050,6190,1763],{"class":1071},[1050,6192,6193,6195,6198],{"class":1052,"line":1943},[1050,6194,1212],{"class":1211},[1050,6196,6197],{"class":1215},"Examples of different locking strategies",[1050,6199,1219],{"class":1211},[1050,6201,6202],{"class":1052,"line":1974},[1050,6203,1225],{"class":1067},[1050,6205,6206],{"class":1052,"line":2005},[1050,6207,6208],{"class":1056},"    # Standard select_for_update (exclusive lock)\n",[1050,6210,6211,6213,6216],{"class":1052,"line":2010},[1050,6212,3021],{"class":1181},[1050,6214,6215],{"class":1169}," exclusive_lock_example",[1050,6217,1763],{"class":1071},[1050,6219,6220,6223,6225,6227,6229],{"class":1052,"line":2016},[1050,6221,6222],{"class":1063},"        with",[1050,6224,1755],{"class":1067},[1050,6226,1072],{"class":1071},[1050,6228,1760],{"class":1253},[1050,6230,1763],{"class":1071},[1050,6232,6233,6236,6238,6240,6242,6244,6246,6248,6250,6252,6254,6256,6258,6261],{"class":1052,"line":2037},[1050,6234,6235],{"class":1067},"            account ",[1050,6237,1240],{"class":1071},[1050,6239,1120],{"class":1067},[1050,6241,1072],{"class":1071},[1050,6243,1248],{"class":1247},[1050,6245,1072],{"class":1071},[1050,6247,1254],{"class":1253},[1050,6249,1257],{"class":1071},[1050,6251,1260],{"class":1253},[1050,6253,1188],{"class":1071},[1050,6255,1266],{"class":1265},[1050,6257,1240],{"class":1071},[1050,6259,6260],{"class":1829},"1",[1050,6262,1273],{"class":1071},[1050,6264,6265],{"class":1052,"line":2050},[1050,6266,6267],{"class":1056},"            # Other transactions will wait\n",[1050,6269,6270,6273,6275,6277,6279,6281,6283,6285,6287,6289,6291,6293],{"class":1052,"line":2062},[1050,6271,6272],{"class":1067},"            account",[1050,6274,1072],{"class":1071},[1050,6276,1331],{"class":1247},[1050,6278,1388],{"class":1071},[1050,6280,1391],{"class":1253},[1050,6282,1188],{"class":1071},[1050,6284,1396],{"class":1355},[1050,6286,1331],{"class":1359},[1050,6288,1396],{"class":1355},[1050,6290,1403],{"class":1071},[1050,6292,1436],{"class":1334},[1050,6294,6295],{"class":1829}," 100\n",[1050,6297,6298,6300,6302,6304],{"class":1052,"line":2083},[1050,6299,6272],{"class":1067},[1050,6301,1072],{"class":1071},[1050,6303,1453],{"class":1253},[1050,6305,2633],{"class":1071},[1050,6307,6308],{"class":1052,"line":2098},[1050,6309,1225],{"class":1067},[1050,6311,6312],{"class":1052,"line":2103},[1050,6313,6314],{"class":1056},"    # Select for update with NOWAIT (fail fast)\n",[1050,6316,6317,6319,6322],{"class":1052,"line":2108},[1050,6318,3021],{"class":1181},[1050,6320,6321],{"class":1169}," nowait_lock_example",[1050,6323,1763],{"class":1071},[1050,6325,6326,6328],{"class":1052,"line":2114},[1050,6327,3634],{"class":1063},[1050,6329,1340],{"class":1071},[1050,6331,6332,6335,6337,6339,6341],{"class":1052,"line":2152},[1050,6333,6334],{"class":1063},"            with",[1050,6336,1755],{"class":1067},[1050,6338,1072],{"class":1071},[1050,6340,1760],{"class":1253},[1050,6342,1763],{"class":1071},[1050,6344,6345,6348,6350,6352,6354,6356,6358,6360,6362,6365,6367,6370,6373,6375,6377,6379,6381,6383],{"class":1052,"line":2175},[1050,6346,6347],{"class":1067},"                account ",[1050,6349,1240],{"class":1071},[1050,6351,1120],{"class":1067},[1050,6353,1072],{"class":1071},[1050,6355,1248],{"class":1247},[1050,6357,1072],{"class":1071},[1050,6359,1254],{"class":1253},[1050,6361,1188],{"class":1071},[1050,6363,6364],{"class":1265},"nowait",[1050,6366,1240],{"class":1071},[1050,6368,6369],{"class":1699},"True",[1050,6371,6372],{"class":1071},").",[1050,6374,1260],{"class":1253},[1050,6376,1188],{"class":1071},[1050,6378,1266],{"class":1265},[1050,6380,1240],{"class":1071},[1050,6382,6260],{"class":1829},[1050,6384,1273],{"class":1071},[1050,6386,6387,6390,6392,6394,6396,6398,6400,6402,6404,6406,6408,6410],{"class":1052,"line":2180},[1050,6388,6389],{"class":1067},"                account",[1050,6391,1072],{"class":1071},[1050,6393,1331],{"class":1247},[1050,6395,1388],{"class":1071},[1050,6397,1391],{"class":1253},[1050,6399,1188],{"class":1071},[1050,6401,1396],{"class":1355},[1050,6403,1331],{"class":1359},[1050,6405,1396],{"class":1355},[1050,6407,1403],{"class":1071},[1050,6409,1436],{"class":1334},[1050,6411,6295],{"class":1829},[1050,6413,6414,6416,6418,6420],{"class":1052,"line":2206},[1050,6415,6389],{"class":1067},[1050,6417,1072],{"class":1071},[1050,6419,1453],{"class":1253},[1050,6421,2633],{"class":1071},[1050,6423,6424,6426,6429],{"class":1052,"line":2211},[1050,6425,3875],{"class":1063},[1050,6427,6428],{"class":1067}," DatabaseError",[1050,6430,1340],{"class":1071},[1050,6432,6433],{"class":1052,"line":2217},[1050,6434,6435],{"class":1056},"            # Handle lock acquisition failure\n",[1050,6437,6438,6440,6443,6446],{"class":1052,"line":2233},[1050,6439,2734],{"class":1063},[1050,6441,6442],{"class":1355}," \"",[1050,6444,6445],{"class":1359},"Resource is busy, try again later",[1050,6447,6448],{"class":1355},"\"\n",[1050,6450,6451],{"class":1052,"line":2256},[1050,6452,1225],{"class":1067},[1050,6454,6455],{"class":1052,"line":2261},[1050,6456,6457],{"class":1056},"    # Select for update with SKIP LOCKED\n",[1050,6459,6460,6462,6465],{"class":1052,"line":5364},[1050,6461,3021],{"class":1181},[1050,6463,6464],{"class":1169}," skip_locked_example",[1050,6466,1763],{"class":1071},[1050,6468,6469,6471,6474],{"class":1052,"line":5380},[1050,6470,3042],{"class":1211},[1050,6472,6473],{"class":1215},"Process available records, skip locked ones",[1050,6475,1219],{"class":1211},[1050,6477,6478,6480,6482,6484,6486],{"class":1052,"line":5392},[1050,6479,6222],{"class":1063},[1050,6481,1755],{"class":1067},[1050,6483,1072],{"class":1071},[1050,6485,1760],{"class":1253},[1050,6487,1763],{"class":1071},[1050,6489,6490],{"class":1052,"line":5409},[1050,6491,6492],{"class":1056},"            # Get unlocked pending orders\n",[1050,6494,6495,6498,6500,6502,6504,6506,6508,6510],{"class":1052,"line":5414},[1050,6496,6497],{"class":1067},"            pending_orders ",[1050,6499,1240],{"class":1071},[1050,6501,1142],{"class":1067},[1050,6503,1072],{"class":1071},[1050,6505,1248],{"class":1247},[1050,6507,1072],{"class":1071},[1050,6509,1254],{"class":1253},[1050,6511,1522],{"class":1071},[1050,6513,6514,6517,6519],{"class":1052,"line":5419},[1050,6515,6516],{"class":1265},"                skip_locked",[1050,6518,1240],{"class":1071},[1050,6520,6521],{"class":1699},"True\n",[1050,6523,6524,6527,6529,6531,6533,6535,6537,6539,6541,6544,6547],{"class":1052,"line":5425},[1050,6525,6526],{"class":1071},"            ).",[1050,6528,3154],{"class":1253},[1050,6530,1188],{"class":1071},[1050,6532,2588],{"class":1265},[1050,6534,1240],{"class":1071},[1050,6536,1396],{"class":1355},[1050,6538,1814],{"class":1359},[1050,6540,1396],{"class":1355},[1050,6542,6543],{"class":1071},")[:",[1050,6545,6546],{"class":1829},"10",[1050,6548,1922],{"class":1071},[1050,6550,6552],{"class":1052,"line":6551},92,[1050,6553,1934],{"class":1067},[1050,6555,6557,6559,6561,6563,6566],{"class":1052,"line":6556},93,[1050,6558,3712],{"class":1063},[1050,6560,6035],{"class":1067},[1050,6562,1870],{"class":1063},[1050,6564,6565],{"class":1067}," pending_orders",[1050,6567,1340],{"class":1071},[1050,6569,6571,6574,6576,6578],{"class":1052,"line":6570},94,[1050,6572,6573],{"class":1253},"                process_order",[1050,6575,1188],{"class":1071},[1050,6577,2045],{"class":1253},[1050,6579,1273],{"class":1071},[1050,6581,6583],{"class":1052,"line":6582},95,[1050,6584,1225],{"class":1067},[1050,6586,6588],{"class":1052,"line":6587},96,[1050,6589,6590],{"class":1056},"    # Shared lock (PostgreSQL)\n",[1050,6592,6594,6596,6599],{"class":1052,"line":6593},97,[1050,6595,3021],{"class":1181},[1050,6597,6598],{"class":1169}," shared_lock_example",[1050,6600,1763],{"class":1071},[1050,6602,6604,6606,6608,6610,6612],{"class":1052,"line":6603},98,[1050,6605,6222],{"class":1063},[1050,6607,1755],{"class":1067},[1050,6609,1072],{"class":1071},[1050,6611,1760],{"class":1253},[1050,6613,1763],{"class":1071},[1050,6615,6617],{"class":1052,"line":6616},99,[1050,6618,6619],{"class":1056},"            # Multiple readers can acquire shared locks\n",[1050,6621,6623,6626,6628,6630,6632,6634,6636,6638],{"class":1052,"line":6622},100,[1050,6624,6625],{"class":1067},"            products ",[1050,6627,1240],{"class":1071},[1050,6629,1137],{"class":1067},[1050,6631,1072],{"class":1071},[1050,6633,1248],{"class":1247},[1050,6635,1072],{"class":1071},[1050,6637,1254],{"class":1253},[1050,6639,1522],{"class":1071},[1050,6641,6643,6646,6649,6651,6653,6655,6658],{"class":1052,"line":6642},101,[1050,6644,6645],{"class":1265},"                of",[1050,6647,6648],{"class":1071},"=(",[1050,6650,1396],{"class":1355},[1050,6652,3030],{"class":1359},[1050,6654,1396],{"class":1355},[1050,6656,6657],{"class":1071},",)",[1050,6659,6660],{"class":1056},"  # PostgreSQL specific\n",[1050,6662,6664,6666,6668,6670,6673,6675,6677],{"class":1052,"line":6663},102,[1050,6665,6526],{"class":1071},[1050,6667,3154],{"class":1253},[1050,6669,1188],{"class":1071},[1050,6671,6672],{"class":1265},"category_id",[1050,6674,1240],{"class":1071},[1050,6676,6260],{"class":1829},[1050,6678,1273],{"class":1071},[1050,6680,6682],{"class":1052,"line":6681},103,[1050,6683,1934],{"class":1067},[1050,6685,6687],{"class":1052,"line":6686},104,[1050,6688,6689],{"class":1056},"            # Read operations are allowed by other transactions\n",[1050,6691,6693,6695,6698,6700,6703,6705,6708,6710,6712,6714,6716,6718,6720,6723,6725],{"class":1052,"line":6692},105,[1050,6694,2734],{"class":1063},[1050,6696,6697],{"class":1349}," list",[1050,6699,1188],{"class":1071},[1050,6701,6702],{"class":1253},"products",[1050,6704,1072],{"class":1071},[1050,6706,6707],{"class":1253},"values",[1050,6709,1188],{"class":1071},[1050,6711,1396],{"class":1355},[1050,6713,1996],{"class":1359},[1050,6715,1396],{"class":1355},[1050,6717,1123],{"class":1071},[1050,6719,2593],{"class":1355},[1050,6721,6722],{"class":1359},"price",[1050,6724,1396],{"class":1355},[1050,6726,6727],{"class":1071},"))\n",[1030,6729,6731],{"id":6730},"transaction-performance-and-optimization","Transaction Performance and Optimization",[1035,6733,6735],{"id":6734},"bulk-operations-in-transactions","Bulk Operations in Transactions",[1040,6737,6739],{"className":1042,"code":6738,"language":1044,"meta":1045,"style":1045},"from django.db import transaction\n\nclass OptimizedTransactionOperations:\n    \"\"\"Optimized transaction patterns for performance\"\"\"\n    \n    @staticmethod\n    @transaction.atomic\n    def bulk_create_with_relations(data_list):\n        \"\"\"Efficiently create objects with relationships\"\"\"\n        \n        # Bulk create main objects\n        main_objects = []\n        for data in data_list:\n            main_objects.append(MainModel(\n                name=data['name'],\n                description=data['description']\n            ))\n        \n        created_objects = MainModel.objects.bulk_create(main_objects)\n        \n        # Bulk create related objects\n        related_objects = []\n        for i, data in enumerate(data_list):\n            for related_data in data['related_items']:\n                related_objects.append(RelatedModel(\n                    main_object=created_objects[i],\n                    value=related_data['value']\n                ))\n        \n        RelatedModel.objects.bulk_create(related_objects)\n        \n        return created_objects\n    \n    @staticmethod\n    @transaction.atomic\n    def batch_update_with_validation(updates):\n        \"\"\"Batch update with validation and rollback on any failure\"\"\"\n        \n        objects_to_update = []\n        \n        # Validate all updates first\n        for update_data in updates:\n            obj = MyModel.objects.select_for_update().get(id=update_data['id'])\n            \n            # Validate update\n            if not validate_update(obj, update_data):\n                raise ValueError(f\"Invalid update for object {obj.id}\")\n            \n            # Apply changes\n            for field, value in update_data['changes'].items():\n                setattr(obj, field, value)\n            \n            objects_to_update.append(obj)\n        \n        # Bulk update if all validations pass\n        MyModel.objects.bulk_update(\n            objects_to_update,\n            [field for field in update_data['changes'].keys()]\n        )\n        \n        return len(objects_to_update)\n    \n    @staticmethod\n    def chunked_transaction_processing(queryset, chunk_size=1000):\n        \"\"\"Process large datasets in chunked transactions\"\"\"\n        \n        total_processed = 0\n        \n        # Process in chunks to avoid long-running transactions\n        for chunk in queryset.iterator(chunk_size=chunk_size):\n            chunk_list = list(chunk)\n            \n            with transaction.atomic():\n                for obj in chunk_list:\n                    process_single_object(obj)\n                \n                total_processed += len(chunk_list)\n                \n                # Optional: Add progress logging\n                if total_processed % (chunk_size * 10) == 0:\n                    logger.info(f\"Processed {total_processed} objects\")\n        \n        return total_processed\n\n# Connection and transaction pooling\ndef connection_management_examples():\n    \"\"\"Examples of connection and transaction management\"\"\"\n    \n    # Using specific database connections\n    def multi_database_transaction():\n        \"\"\"Transaction across multiple databases\"\"\"\n        \n        # Note: Django doesn't support distributed transactions\n        # Each database transaction is separate\n        \n        with transaction.atomic(using='primary'):\n            # Operations on primary database\n            PrimaryModel.objects.create(name='Primary Record')\n            \n        with transaction.atomic(using='analytics'):\n            # Operations on analytics database\n            AnalyticsModel.objects.create(event='Record Created')\n    \n    # Manual transaction management\n    def manual_transaction_control():\n        \"\"\"Manual transaction control for fine-grained management\"\"\"\n        \n        # Start transaction manually\n        transaction.set_autocommit(False)\n        \n        try:\n            # Perform operations\n            obj1 = Model1.objects.create(name='Object 1')\n            obj2 = Model2.objects.create(related=obj1)\n            \n            # Commit manually\n            transaction.commit()\n            \n        except Exception as e:\n            # Rollback on error\n            transaction.rollback()\n            raise\n        finally:\n            # Restore autocommit\n            transaction.set_autocommit(True)\n\n# Transaction middleware for request-level transactions\nclass TransactionMiddleware:\n    \"\"\"Middleware to wrap each request in a transaction\"\"\"\n    \n    def __init__(self, get_response):\n        self.get_response = get_response\n    \n    def __call__(self, request):\n        if request.method in ['POST', 'PUT', 'PATCH', 'DELETE']:\n            with transaction.atomic():\n                response = self.get_response(request)\n                \n                # Check for error responses and rollback if needed\n                if response.status_code >= 400:\n                    transaction.set_rollback(True)\n                \n                return response\n        else:\n            # Read-only requests don't need transactions\n            return self.get_response(request)\n",[1047,6740,6741,6755,6759,6768,6777,6781,6788,6798,6812,6821,6825,6830,6839,6853,6869,6889,6909,6914,6918,6943,6947,6952,6961,6981,7004,7020,7037,7058,7063,7067,7087,7091,7098,7102,7108,7118,7132,7141,7145,7154,7158,7163,7177,7218,7222,7227,7248,7275,7279,7284,7315,7335,7339,7354,7358,7363,7379,7385,7419,7423,7427,7441,7445,7451,7475,7484,7488,7497,7501,7506,7534,7550,7554,7566,7581,7592,7596,7612,7616,7621,7652,7681,7685,7692,7696,7701,7710,7719,7723,7728,7737,7746,7750,7755,7760,7764,7790,7795,7823,7827,7852,7857,7886,7890,7895,7904,7914,7919,7925,7942,7947,7954,7960,7994,8025,8030,8036,8047,8052,8065,8071,8083,8088,8096,8102,8117,8122,8128,8138,8148,8153,8172,8187,8192,8211,8262,8275,8295,8300,8306,8327,8344,8349,8358,8365,8371],{"__ignoreMap":1045},[1050,6742,6743,6745,6747,6749,6751,6753],{"class":1052,"line":1053},[1050,6744,1064],{"class":1063},[1050,6746,1068],{"class":1067},[1050,6748,1072],{"class":1071},[1050,6750,1075],{"class":1067},[1050,6752,1078],{"class":1063},[1050,6754,1081],{"class":1067},[1050,6756,6757],{"class":1052,"line":1060},[1050,6758,1154],{"emptyLinePlaceholder":1153},[1050,6760,6761,6763,6766],{"class":1052,"line":1084},[1050,6762,2979],{"class":1181},[1050,6764,6765],{"class":2982}," OptimizedTransactionOperations",[1050,6767,1340],{"class":1071},[1050,6769,6770,6772,6775],{"class":1052,"line":1106},[1050,6771,1212],{"class":1211},[1050,6773,6774],{"class":1215},"Optimized transaction patterns for performance",[1050,6776,1219],{"class":1211},[1050,6778,6779],{"class":1052,"line":1150},[1050,6780,1225],{"class":1067},[1050,6782,6783,6785],{"class":1052,"line":1157},[1050,6784,3010],{"class":1071},[1050,6786,6787],{"class":1349},"staticmethod\n",[1050,6789,6790,6792,6794,6796],{"class":1052,"line":1163},[1050,6791,3010],{"class":1071},[1050,6793,1170],{"class":1169},[1050,6795,1072],{"class":1071},[1050,6797,1175],{"class":1169},[1050,6799,6800,6802,6805,6807,6810],{"class":1052,"line":1178},[1050,6801,3021],{"class":1181},[1050,6803,6804],{"class":1169}," bulk_create_with_relations",[1050,6806,1188],{"class":1071},[1050,6808,6809],{"class":1191},"data_list",[1050,6811,1205],{"class":1071},[1050,6813,6814,6816,6819],{"class":1052,"line":1208},[1050,6815,3042],{"class":1211},[1050,6817,6818],{"class":1215},"Efficiently create objects with relationships",[1050,6820,1219],{"class":1211},[1050,6822,6823],{"class":1052,"line":1222},[1050,6824,1842],{"class":1067},[1050,6826,6827],{"class":1052,"line":1228},[1050,6828,6829],{"class":1056},"        # Bulk create main objects\n",[1050,6831,6832,6835,6837],{"class":1052,"line":1234},[1050,6833,6834],{"class":1067},"        main_objects ",[1050,6836,1240],{"class":1071},[1050,6838,4521],{"class":1071},[1050,6840,6841,6843,6846,6848,6851],{"class":1052,"line":1276},[1050,6842,1864],{"class":1063},[1050,6844,6845],{"class":1067}," data ",[1050,6847,1870],{"class":1063},[1050,6849,6850],{"class":1067}," data_list",[1050,6852,1340],{"class":1071},[1050,6854,6855,6858,6860,6862,6864,6867],{"class":1052,"line":1309},[1050,6856,6857],{"class":1067},"            main_objects",[1050,6859,1072],{"class":1071},[1050,6861,4683],{"class":1253},[1050,6863,1188],{"class":1071},[1050,6865,6866],{"class":1253},"MainModel",[1050,6868,1522],{"class":1071},[1050,6870,6871,6874,6876,6879,6881,6883,6885,6887],{"class":1052,"line":1314},[1050,6872,6873],{"class":1265},"                name",[1050,6875,1240],{"class":1071},[1050,6877,6878],{"class":1253},"data",[1050,6880,1912],{"class":1071},[1050,6882,1396],{"class":1355},[1050,6884,1996],{"class":1359},[1050,6886,1396],{"class":1355},[1050,6888,2080],{"class":1071},[1050,6890,6891,6894,6896,6898,6900,6902,6905,6907],{"class":1052,"line":1320},[1050,6892,6893],{"class":1265},"                description",[1050,6895,1240],{"class":1071},[1050,6897,6878],{"class":1253},[1050,6899,1912],{"class":1071},[1050,6901,1396],{"class":1355},[1050,6903,6904],{"class":1359},"description",[1050,6906,1396],{"class":1355},[1050,6908,1922],{"class":1071},[1050,6910,6911],{"class":1052,"line":1343},[1050,6912,6913],{"class":1071},"            ))\n",[1050,6915,6916],{"class":1052,"line":1367},[1050,6917,1842],{"class":1067},[1050,6919,6920,6923,6925,6927,6929,6931,6933,6936,6938,6941],{"class":1052,"line":1372},[1050,6921,6922],{"class":1067},"        created_objects ",[1050,6924,1240],{"class":1071},[1050,6926,5215],{"class":1067},[1050,6928,1072],{"class":1071},[1050,6930,1248],{"class":1247},[1050,6932,1072],{"class":1071},[1050,6934,6935],{"class":1253},"bulk_create",[1050,6937,1188],{"class":1071},[1050,6939,6940],{"class":1253},"main_objects",[1050,6942,1273],{"class":1071},[1050,6944,6945],{"class":1052,"line":1378},[1050,6946,1842],{"class":1067},[1050,6948,6949],{"class":1052,"line":1412},[1050,6950,6951],{"class":1056},"        # Bulk create related objects\n",[1050,6953,6954,6957,6959],{"class":1052,"line":1441},[1050,6955,6956],{"class":1067},"        related_objects ",[1050,6958,1240],{"class":1071},[1050,6960,4521],{"class":1071},[1050,6962,6963,6965,6967,6969,6971,6973,6975,6977,6979],{"class":1052,"line":1446},[1050,6964,1864],{"class":1063},[1050,6966,4549],{"class":1067},[1050,6968,1123],{"class":1071},[1050,6970,6845],{"class":1067},[1050,6972,1870],{"class":1063},[1050,6974,4560],{"class":4559},[1050,6976,1188],{"class":1071},[1050,6978,6809],{"class":1253},[1050,6980,1205],{"class":1071},[1050,6982,6983,6985,6988,6990,6993,6995,6997,7000,7002],{"class":1052,"line":1473},[1050,6984,3712],{"class":1063},[1050,6986,6987],{"class":1067}," related_data ",[1050,6989,1870],{"class":1063},[1050,6991,6992],{"class":1067}," data",[1050,6994,1912],{"class":1071},[1050,6996,1396],{"class":1355},[1050,6998,6999],{"class":1359},"related_items",[1050,7001,1396],{"class":1355},[1050,7003,1971],{"class":1071},[1050,7005,7006,7009,7011,7013,7015,7018],{"class":1052,"line":1496},[1050,7007,7008],{"class":1067},"                related_objects",[1050,7010,1072],{"class":1071},[1050,7012,4683],{"class":1253},[1050,7014,1188],{"class":1071},[1050,7016,7017],{"class":1253},"RelatedModel",[1050,7019,1522],{"class":1071},[1050,7021,7022,7025,7027,7030,7032,7035],{"class":1052,"line":1501},[1050,7023,7024],{"class":1265},"                    main_object",[1050,7026,1240],{"class":1071},[1050,7028,7029],{"class":1253},"created_objects",[1050,7031,1912],{"class":1071},[1050,7033,7034],{"class":1253},"i",[1050,7036,2080],{"class":1071},[1050,7038,7039,7042,7044,7047,7049,7051,7054,7056],{"class":1052,"line":1507},[1050,7040,7041],{"class":1265},"                    value",[1050,7043,1240],{"class":1071},[1050,7045,7046],{"class":1253},"related_data",[1050,7048,1912],{"class":1071},[1050,7050,1396],{"class":1355},[1050,7052,7053],{"class":1359},"value",[1050,7055,1396],{"class":1355},[1050,7057,1922],{"class":1071},[1050,7059,7060],{"class":1052,"line":1525},[1050,7061,7062],{"class":1071},"                ))\n",[1050,7064,7065],{"class":1052,"line":1539},[1050,7066,1842],{"class":1067},[1050,7068,7069,7072,7074,7076,7078,7080,7082,7085],{"class":1052,"line":1555},[1050,7070,7071],{"class":1067},"        RelatedModel",[1050,7073,1072],{"class":1071},[1050,7075,1248],{"class":1247},[1050,7077,1072],{"class":1071},[1050,7079,6935],{"class":1253},[1050,7081,1188],{"class":1071},[1050,7083,7084],{"class":1253},"related_objects",[1050,7086,1273],{"class":1071},[1050,7088,7089],{"class":1052,"line":1572},[1050,7090,1842],{"class":1067},[1050,7092,7093,7095],{"class":1052,"line":1598},[1050,7094,2264],{"class":1063},[1050,7096,7097],{"class":1067}," created_objects\n",[1050,7099,7100],{"class":1052,"line":1604},[1050,7101,1225],{"class":1067},[1050,7103,7104,7106],{"class":1052,"line":1609},[1050,7105,3010],{"class":1071},[1050,7107,6787],{"class":1349},[1050,7109,7110,7112,7114,7116],{"class":1052,"line":1624},[1050,7111,3010],{"class":1071},[1050,7113,1170],{"class":1169},[1050,7115,1072],{"class":1071},[1050,7117,1175],{"class":1169},[1050,7119,7120,7122,7125,7127,7130],{"class":1052,"line":1636},[1050,7121,3021],{"class":1181},[1050,7123,7124],{"class":1169}," batch_update_with_validation",[1050,7126,1188],{"class":1071},[1050,7128,7129],{"class":1191},"updates",[1050,7131,1205],{"class":1071},[1050,7133,7134,7136,7139],{"class":1052,"line":1647},[1050,7135,3042],{"class":1211},[1050,7137,7138],{"class":1215},"Batch update with validation and rollback on any failure",[1050,7140,1219],{"class":1211},[1050,7142,7143],{"class":1052,"line":1663},[1050,7144,1842],{"class":1067},[1050,7146,7147,7150,7152],{"class":1052,"line":1683},[1050,7148,7149],{"class":1067},"        objects_to_update ",[1050,7151,1240],{"class":1071},[1050,7153,4521],{"class":1071},[1050,7155,7156],{"class":1052,"line":1688},[1050,7157,1842],{"class":1067},[1050,7159,7160],{"class":1052,"line":1693},[1050,7161,7162],{"class":1056},"        # Validate all updates first\n",[1050,7164,7165,7167,7170,7172,7175],{"class":1052,"line":1703},[1050,7166,1864],{"class":1063},[1050,7168,7169],{"class":1067}," update_data ",[1050,7171,1870],{"class":1063},[1050,7173,7174],{"class":1067}," updates",[1050,7176,1340],{"class":1071},[1050,7178,7179,7182,7184,7187,7189,7191,7193,7195,7197,7199,7201,7203,7205,7208,7210,7212,7214,7216],{"class":1052,"line":1708},[1050,7180,7181],{"class":1067},"            obj ",[1050,7183,1240],{"class":1071},[1050,7185,7186],{"class":1067}," MyModel",[1050,7188,1072],{"class":1071},[1050,7190,1248],{"class":1247},[1050,7192,1072],{"class":1071},[1050,7194,1254],{"class":1253},[1050,7196,1257],{"class":1071},[1050,7198,1260],{"class":1253},[1050,7200,1188],{"class":1071},[1050,7202,1266],{"class":1265},[1050,7204,1240],{"class":1071},[1050,7206,7207],{"class":1253},"update_data",[1050,7209,1912],{"class":1071},[1050,7211,1396],{"class":1355},[1050,7213,1266],{"class":1359},[1050,7215,1396],{"class":1355},[1050,7217,1470],{"class":1071},[1050,7219,7220],{"class":1052,"line":1714},[1050,7221,1934],{"class":1067},[1050,7223,7224],{"class":1052,"line":1734},[1050,7225,7226],{"class":1056},"            # Validate update\n",[1050,7228,7229,7231,7233,7236,7238,7241,7243,7246],{"class":1052,"line":1744},[1050,7230,1946],{"class":1063},[1050,7232,4808],{"class":1334},[1050,7234,7235],{"class":1253}," validate_update",[1050,7237,1188],{"class":1071},[1050,7239,7240],{"class":1253},"obj",[1050,7242,1123],{"class":1071},[1050,7244,7245],{"class":1253}," update_data",[1050,7247,1205],{"class":1071},[1050,7249,7250,7252,7254,7256,7258,7261,7263,7265,7267,7269,7271,7273],{"class":1052,"line":1749},[1050,7251,1977],{"class":1063},[1050,7253,1350],{"class":1349},[1050,7255,1188],{"class":1071},[1050,7257,1580],{"class":1181},[1050,7259,7260],{"class":1359},"\"Invalid update for object ",[1050,7262,1587],{"class":1586},[1050,7264,7240],{"class":1253},[1050,7266,1072],{"class":1071},[1050,7268,1266],{"class":1247},[1050,7270,1592],{"class":1586},[1050,7272,1356],{"class":1359},[1050,7274,1273],{"class":1071},[1050,7276,7277],{"class":1052,"line":1766},[1050,7278,1934],{"class":1067},[1050,7280,7281],{"class":1052,"line":1772},[1050,7282,7283],{"class":1056},"            # Apply changes\n",[1050,7285,7286,7288,7291,7293,7296,7298,7300,7302,7304,7307,7309,7311,7313],{"class":1052,"line":1792},[1050,7287,3712],{"class":1063},[1050,7289,7290],{"class":1067}," field",[1050,7292,1123],{"class":1071},[1050,7294,7295],{"class":1067}," value ",[1050,7297,1870],{"class":1063},[1050,7299,7245],{"class":1067},[1050,7301,1912],{"class":1071},[1050,7303,1396],{"class":1355},[1050,7305,7306],{"class":1359},"changes",[1050,7308,1396],{"class":1355},[1050,7310,4680],{"class":1071},[1050,7312,5964],{"class":1253},[1050,7314,1763],{"class":1071},[1050,7316,7317,7320,7322,7324,7326,7328,7330,7333],{"class":1052,"line":1804},[1050,7318,7319],{"class":4559},"                setattr",[1050,7321,1188],{"class":1071},[1050,7323,7240],{"class":1253},[1050,7325,1123],{"class":1071},[1050,7327,7290],{"class":1253},[1050,7329,1123],{"class":1071},[1050,7331,7332],{"class":1253}," value",[1050,7334,1273],{"class":1071},[1050,7336,7337],{"class":1052,"line":1821},[1050,7338,1934],{"class":1067},[1050,7340,7341,7344,7346,7348,7350,7352],{"class":1052,"line":1833},[1050,7342,7343],{"class":1067},"            objects_to_update",[1050,7345,1072],{"class":1071},[1050,7347,4683],{"class":1253},[1050,7349,1188],{"class":1071},[1050,7351,7240],{"class":1253},[1050,7353,1273],{"class":1071},[1050,7355,7356],{"class":1052,"line":1839},[1050,7357,1842],{"class":1067},[1050,7359,7360],{"class":1052,"line":1845},[1050,7361,7362],{"class":1056},"        # Bulk update if all validations pass\n",[1050,7364,7365,7368,7370,7372,7374,7377],{"class":1052,"line":1856},[1050,7366,7367],{"class":1067},"        MyModel",[1050,7369,1072],{"class":1071},[1050,7371,1248],{"class":1247},[1050,7373,1072],{"class":1071},[1050,7375,7376],{"class":1253},"bulk_update",[1050,7378,1522],{"class":1071},[1050,7380,7381,7383],{"class":1052,"line":1861},[1050,7382,7343],{"class":1253},[1050,7384,1536],{"class":1071},[1050,7386,7387,7390,7393,7396,7399,7401,7403,7405,7407,7409,7411,7413,7416],{"class":1052,"line":1877},[1050,7388,7389],{"class":1071},"            [",[1050,7391,7392],{"class":1253},"field ",[1050,7394,7395],{"class":1063},"for",[1050,7397,7398],{"class":1253}," field ",[1050,7400,1870],{"class":1063},[1050,7402,7245],{"class":1253},[1050,7404,1912],{"class":1071},[1050,7406,1396],{"class":1355},[1050,7408,7306],{"class":1359},[1050,7410,1396],{"class":1355},[1050,7412,4680],{"class":1071},[1050,7414,7415],{"class":1253},"keys",[1050,7417,7418],{"class":1071},"()]\n",[1050,7420,7421],{"class":1052,"line":1901},[1050,7422,1836],{"class":1071},[1050,7424,7425],{"class":1052,"line":1925},[1050,7426,1842],{"class":1067},[1050,7428,7429,7431,7434,7436,7439],{"class":1052,"line":1931},[1050,7430,2264],{"class":1063},[1050,7432,7433],{"class":4559}," len",[1050,7435,1188],{"class":1071},[1050,7437,7438],{"class":1253},"objects_to_update",[1050,7440,1273],{"class":1071},[1050,7442,7443],{"class":1052,"line":1937},[1050,7444,1225],{"class":1067},[1050,7446,7447,7449],{"class":1052,"line":1943},[1050,7448,3010],{"class":1071},[1050,7450,6787],{"class":1349},[1050,7452,7453,7455,7458,7460,7463,7465,7468,7470,7473],{"class":1052,"line":1974},[1050,7454,3021],{"class":1181},[1050,7456,7457],{"class":1169}," chunked_transaction_processing",[1050,7459,1188],{"class":1071},[1050,7461,7462],{"class":1191},"queryset",[1050,7464,1123],{"class":1071},[1050,7466,7467],{"class":1191}," chunk_size",[1050,7469,1240],{"class":1334},[1050,7471,7472],{"class":1829},"1000",[1050,7474,1205],{"class":1071},[1050,7476,7477,7479,7482],{"class":1052,"line":2005},[1050,7478,3042],{"class":1211},[1050,7480,7481],{"class":1215},"Process large datasets in chunked transactions",[1050,7483,1219],{"class":1211},[1050,7485,7486],{"class":1052,"line":2010},[1050,7487,1842],{"class":1067},[1050,7489,7490,7493,7495],{"class":1052,"line":2016},[1050,7491,7492],{"class":1067},"        total_processed ",[1050,7494,1240],{"class":1071},[1050,7496,1853],{"class":1829},[1050,7498,7499],{"class":1052,"line":2037},[1050,7500,1842],{"class":1067},[1050,7502,7503],{"class":1052,"line":2050},[1050,7504,7505],{"class":1056},"        # Process in chunks to avoid long-running transactions\n",[1050,7507,7508,7510,7513,7515,7518,7520,7523,7525,7528,7530,7532],{"class":1052,"line":2062},[1050,7509,1864],{"class":1063},[1050,7511,7512],{"class":1067}," chunk ",[1050,7514,1870],{"class":1063},[1050,7516,7517],{"class":1067}," queryset",[1050,7519,1072],{"class":1071},[1050,7521,7522],{"class":1253},"iterator",[1050,7524,1188],{"class":1071},[1050,7526,7527],{"class":1265},"chunk_size",[1050,7529,1240],{"class":1071},[1050,7531,7527],{"class":1253},[1050,7533,1205],{"class":1071},[1050,7535,7536,7539,7541,7543,7545,7548],{"class":1052,"line":2083},[1050,7537,7538],{"class":1067},"            chunk_list ",[1050,7540,1240],{"class":1071},[1050,7542,6697],{"class":1349},[1050,7544,1188],{"class":1071},[1050,7546,7547],{"class":1253},"chunk",[1050,7549,1273],{"class":1071},[1050,7551,7552],{"class":1052,"line":2098},[1050,7553,1934],{"class":1067},[1050,7555,7556,7558,7560,7562,7564],{"class":1052,"line":2103},[1050,7557,6334],{"class":1063},[1050,7559,1755],{"class":1067},[1050,7561,1072],{"class":1071},[1050,7563,1760],{"class":1253},[1050,7565,1763],{"class":1071},[1050,7567,7568,7571,7574,7576,7579],{"class":1052,"line":2108},[1050,7569,7570],{"class":1063},"                for",[1050,7572,7573],{"class":1067}," obj ",[1050,7575,1870],{"class":1063},[1050,7577,7578],{"class":1067}," chunk_list",[1050,7580,1340],{"class":1071},[1050,7582,7583,7586,7588,7590],{"class":1052,"line":2114},[1050,7584,7585],{"class":1253},"                    process_single_object",[1050,7587,1188],{"class":1071},[1050,7589,7240],{"class":1253},[1050,7591,1273],{"class":1071},[1050,7593,7594],{"class":1052,"line":2152},[1050,7595,4745],{"class":1067},[1050,7597,7598,7601,7603,7605,7607,7610],{"class":1052,"line":2175},[1050,7599,7600],{"class":1067},"                total_processed ",[1050,7602,2186],{"class":1071},[1050,7604,7433],{"class":4559},[1050,7606,1188],{"class":1071},[1050,7608,7609],{"class":1253},"chunk_list",[1050,7611,1273],{"class":1071},[1050,7613,7614],{"class":1052,"line":2180},[1050,7615,4745],{"class":1067},[1050,7617,7618],{"class":1052,"line":2206},[1050,7619,7620],{"class":1056},"                # Optional: Add progress logging\n",[1050,7622,7623,7626,7629,7632,7635,7638,7641,7644,7646,7648,7650],{"class":1052,"line":2211},[1050,7624,7625],{"class":1063},"                if",[1050,7627,7628],{"class":1067}," total_processed ",[1050,7630,7631],{"class":1334},"%",[1050,7633,7634],{"class":1071}," (",[1050,7636,7637],{"class":1067},"chunk_size ",[1050,7639,7640],{"class":1334},"*",[1050,7642,7643],{"class":1829}," 10",[1050,7645,1403],{"class":1071},[1050,7647,4002],{"class":1334},[1050,7649,4491],{"class":1829},[1050,7651,1340],{"class":1071},[1050,7653,7654,7657,7659,7662,7664,7666,7669,7671,7674,7676,7679],{"class":1052,"line":2217},[1050,7655,7656],{"class":1067},"                    logger",[1050,7658,1072],{"class":1071},[1050,7660,7661],{"class":1253},"info",[1050,7663,1188],{"class":1071},[1050,7665,1580],{"class":1181},[1050,7667,7668],{"class":1359},"\"Processed ",[1050,7670,1587],{"class":1586},[1050,7672,7673],{"class":1253},"total_processed",[1050,7675,1592],{"class":1586},[1050,7677,7678],{"class":1359}," objects\"",[1050,7680,1273],{"class":1071},[1050,7682,7683],{"class":1052,"line":2233},[1050,7684,1842],{"class":1067},[1050,7686,7687,7689],{"class":1052,"line":2256},[1050,7688,2264],{"class":1063},[1050,7690,7691],{"class":1067}," total_processed\n",[1050,7693,7694],{"class":1052,"line":2261},[1050,7695,1154],{"emptyLinePlaceholder":1153},[1050,7697,7698],{"class":1052,"line":5364},[1050,7699,7700],{"class":1056},"# Connection and transaction pooling\n",[1050,7702,7703,7705,7708],{"class":1052,"line":5380},[1050,7704,1182],{"class":1181},[1050,7706,7707],{"class":1169}," connection_management_examples",[1050,7709,1763],{"class":1071},[1050,7711,7712,7714,7717],{"class":1052,"line":5392},[1050,7713,1212],{"class":1211},[1050,7715,7716],{"class":1215},"Examples of connection and transaction management",[1050,7718,1219],{"class":1211},[1050,7720,7721],{"class":1052,"line":5409},[1050,7722,1225],{"class":1067},[1050,7724,7725],{"class":1052,"line":5414},[1050,7726,7727],{"class":1056},"    # Using specific database connections\n",[1050,7729,7730,7732,7735],{"class":1052,"line":5419},[1050,7731,3021],{"class":1181},[1050,7733,7734],{"class":1169}," multi_database_transaction",[1050,7736,1763],{"class":1071},[1050,7738,7739,7741,7744],{"class":1052,"line":5425},[1050,7740,3042],{"class":1211},[1050,7742,7743],{"class":1215},"Transaction across multiple databases",[1050,7745,1219],{"class":1211},[1050,7747,7748],{"class":1052,"line":6551},[1050,7749,1842],{"class":1067},[1050,7751,7752],{"class":1052,"line":6556},[1050,7753,7754],{"class":1056},"        # Note: Django doesn't support distributed transactions\n",[1050,7756,7757],{"class":1052,"line":6570},[1050,7758,7759],{"class":1056},"        # Each database transaction is separate\n",[1050,7761,7762],{"class":1052,"line":6582},[1050,7763,1842],{"class":1067},[1050,7765,7766,7768,7770,7772,7774,7776,7779,7781,7783,7786,7788],{"class":1052,"line":6587},[1050,7767,6222],{"class":1063},[1050,7769,1755],{"class":1067},[1050,7771,1072],{"class":1071},[1050,7773,1760],{"class":1253},[1050,7775,1188],{"class":1071},[1050,7777,7778],{"class":1265},"using",[1050,7780,1240],{"class":1071},[1050,7782,1396],{"class":1355},[1050,7784,7785],{"class":1359},"primary",[1050,7787,1396],{"class":1355},[1050,7789,1205],{"class":1071},[1050,7791,7792],{"class":1052,"line":6593},[1050,7793,7794],{"class":1056},"            # Operations on primary database\n",[1050,7796,7797,7800,7802,7804,7806,7808,7810,7812,7814,7816,7819,7821],{"class":1052,"line":6603},[1050,7798,7799],{"class":1067},"            PrimaryModel",[1050,7801,1072],{"class":1071},[1050,7803,1248],{"class":1247},[1050,7805,1072],{"class":1071},[1050,7807,1519],{"class":1253},[1050,7809,1188],{"class":1071},[1050,7811,1996],{"class":1265},[1050,7813,1240],{"class":1071},[1050,7815,1396],{"class":1355},[1050,7817,7818],{"class":1359},"Primary Record",[1050,7820,1396],{"class":1355},[1050,7822,1273],{"class":1071},[1050,7824,7825],{"class":1052,"line":6616},[1050,7826,1934],{"class":1067},[1050,7828,7829,7831,7833,7835,7837,7839,7841,7843,7845,7848,7850],{"class":1052,"line":6622},[1050,7830,6222],{"class":1063},[1050,7832,1755],{"class":1067},[1050,7834,1072],{"class":1071},[1050,7836,1760],{"class":1253},[1050,7838,1188],{"class":1071},[1050,7840,7778],{"class":1265},[1050,7842,1240],{"class":1071},[1050,7844,1396],{"class":1355},[1050,7846,7847],{"class":1359},"analytics",[1050,7849,1396],{"class":1355},[1050,7851,1205],{"class":1071},[1050,7853,7854],{"class":1052,"line":6642},[1050,7855,7856],{"class":1056},"            # Operations on analytics database\n",[1050,7858,7859,7862,7864,7866,7868,7870,7872,7875,7877,7879,7882,7884],{"class":1052,"line":6663},[1050,7860,7861],{"class":1067},"            AnalyticsModel",[1050,7863,1072],{"class":1071},[1050,7865,1248],{"class":1247},[1050,7867,1072],{"class":1071},[1050,7869,1519],{"class":1253},[1050,7871,1188],{"class":1071},[1050,7873,7874],{"class":1265},"event",[1050,7876,1240],{"class":1071},[1050,7878,1396],{"class":1355},[1050,7880,7881],{"class":1359},"Record Created",[1050,7883,1396],{"class":1355},[1050,7885,1273],{"class":1071},[1050,7887,7888],{"class":1052,"line":6681},[1050,7889,1225],{"class":1067},[1050,7891,7892],{"class":1052,"line":6686},[1050,7893,7894],{"class":1056},"    # Manual transaction management\n",[1050,7896,7897,7899,7902],{"class":1052,"line":6692},[1050,7898,3021],{"class":1181},[1050,7900,7901],{"class":1169}," manual_transaction_control",[1050,7903,1763],{"class":1071},[1050,7905,7907,7909,7912],{"class":1052,"line":7906},106,[1050,7908,3042],{"class":1211},[1050,7910,7911],{"class":1215},"Manual transaction control for fine-grained management",[1050,7913,1219],{"class":1211},[1050,7915,7917],{"class":1052,"line":7916},107,[1050,7918,1842],{"class":1067},[1050,7920,7922],{"class":1052,"line":7921},108,[1050,7923,7924],{"class":1056},"        # Start transaction manually\n",[1050,7926,7928,7931,7933,7936,7938,7940],{"class":1052,"line":7927},109,[1050,7929,7930],{"class":1067},"        transaction",[1050,7932,1072],{"class":1071},[1050,7934,7935],{"class":1253},"set_autocommit",[1050,7937,1188],{"class":1071},[1050,7939,3084],{"class":1699},[1050,7941,1273],{"class":1071},[1050,7943,7945],{"class":1052,"line":7944},110,[1050,7946,1842],{"class":1067},[1050,7948,7950,7952],{"class":1052,"line":7949},111,[1050,7951,3634],{"class":1063},[1050,7953,1340],{"class":1071},[1050,7955,7957],{"class":1052,"line":7956},112,[1050,7958,7959],{"class":1056},"            # Perform operations\n",[1050,7961,7963,7966,7968,7971,7973,7975,7977,7979,7981,7983,7985,7987,7990,7992],{"class":1052,"line":7962},113,[1050,7964,7965],{"class":1067},"            obj1 ",[1050,7967,1240],{"class":1071},[1050,7969,7970],{"class":1067}," Model1",[1050,7972,1072],{"class":1071},[1050,7974,1248],{"class":1247},[1050,7976,1072],{"class":1071},[1050,7978,1519],{"class":1253},[1050,7980,1188],{"class":1071},[1050,7982,1996],{"class":1265},[1050,7984,1240],{"class":1071},[1050,7986,1396],{"class":1355},[1050,7988,7989],{"class":1359},"Object 1",[1050,7991,1396],{"class":1355},[1050,7993,1273],{"class":1071},[1050,7995,7997,8000,8002,8005,8007,8009,8011,8013,8015,8018,8020,8023],{"class":1052,"line":7996},114,[1050,7998,7999],{"class":1067},"            obj2 ",[1050,8001,1240],{"class":1071},[1050,8003,8004],{"class":1067}," Model2",[1050,8006,1072],{"class":1071},[1050,8008,1248],{"class":1247},[1050,8010,1072],{"class":1071},[1050,8012,1519],{"class":1253},[1050,8014,1188],{"class":1071},[1050,8016,8017],{"class":1265},"related",[1050,8019,1240],{"class":1071},[1050,8021,8022],{"class":1253},"obj1",[1050,8024,1273],{"class":1071},[1050,8026,8028],{"class":1052,"line":8027},115,[1050,8029,1934],{"class":1067},[1050,8031,8033],{"class":1052,"line":8032},116,[1050,8034,8035],{"class":1056},"            # Commit manually\n",[1050,8037,8039,8041,8043,8045],{"class":1052,"line":8038},117,[1050,8040,5304],{"class":1067},[1050,8042,1072],{"class":1071},[1050,8044,3079],{"class":1253},[1050,8046,2633],{"class":1071},[1050,8048,8050],{"class":1052,"line":8049},118,[1050,8051,1934],{"class":1067},[1050,8053,8055,8057,8059,8061,8063],{"class":1052,"line":8054},119,[1050,8056,3875],{"class":1063},[1050,8058,2889],{"class":1349},[1050,8060,2892],{"class":1063},[1050,8062,2895],{"class":1067},[1050,8064,1340],{"class":1071},[1050,8066,8068],{"class":1052,"line":8067},120,[1050,8069,8070],{"class":1056},"            # Rollback on error\n",[1050,8072,8074,8076,8078,8081],{"class":1052,"line":8073},121,[1050,8075,5304],{"class":1067},[1050,8077,1072],{"class":1071},[1050,8079,8080],{"class":1253},"rollback",[1050,8082,2633],{"class":1071},[1050,8084,8086],{"class":1052,"line":8085},122,[1050,8087,3946],{"class":1063},[1050,8089,8091,8094],{"class":1052,"line":8090},123,[1050,8092,8093],{"class":1063},"        finally",[1050,8095,1340],{"class":1071},[1050,8097,8099],{"class":1052,"line":8098},124,[1050,8100,8101],{"class":1056},"            # Restore autocommit\n",[1050,8103,8105,8107,8109,8111,8113,8115],{"class":1052,"line":8104},125,[1050,8106,5304],{"class":1067},[1050,8108,1072],{"class":1071},[1050,8110,7935],{"class":1253},[1050,8112,1188],{"class":1071},[1050,8114,6369],{"class":1699},[1050,8116,1273],{"class":1071},[1050,8118,8120],{"class":1052,"line":8119},126,[1050,8121,1154],{"emptyLinePlaceholder":1153},[1050,8123,8125],{"class":1052,"line":8124},127,[1050,8126,8127],{"class":1056},"# Transaction middleware for request-level transactions\n",[1050,8129,8131,8133,8136],{"class":1052,"line":8130},128,[1050,8132,2979],{"class":1181},[1050,8134,8135],{"class":2982}," TransactionMiddleware",[1050,8137,1340],{"class":1071},[1050,8139,8141,8143,8146],{"class":1052,"line":8140},129,[1050,8142,1212],{"class":1211},[1050,8144,8145],{"class":1215},"Middleware to wrap each request in a transaction",[1050,8147,1219],{"class":1211},[1050,8149,8151],{"class":1052,"line":8150},130,[1050,8152,1225],{"class":1067},[1050,8154,8156,8158,8161,8163,8165,8167,8170],{"class":1052,"line":8155},131,[1050,8157,3021],{"class":1181},[1050,8159,8160],{"class":4559}," __init__",[1050,8162,1188],{"class":1071},[1050,8164,3030],{"class":3029},[1050,8166,1123],{"class":1071},[1050,8168,8169],{"class":1191}," get_response",[1050,8171,1205],{"class":1071},[1050,8173,8175,8177,8179,8182,8184],{"class":1052,"line":8174},132,[1050,8176,3061],{"class":3060},[1050,8178,1072],{"class":1071},[1050,8180,8181],{"class":1247},"get_response",[1050,8183,1388],{"class":1071},[1050,8185,8186],{"class":1067}," get_response\n",[1050,8188,8190],{"class":1052,"line":8189},133,[1050,8191,1225],{"class":1067},[1050,8193,8195,8197,8200,8202,8204,8206,8209],{"class":1052,"line":8194},134,[1050,8196,3021],{"class":1181},[1050,8198,8199],{"class":4559}," __call__",[1050,8201,1188],{"class":1071},[1050,8203,3030],{"class":3029},[1050,8205,1123],{"class":1071},[1050,8207,8208],{"class":1191}," request",[1050,8210,1205],{"class":1071},[1050,8212,8214,8216,8218,8220,8222,8224,8227,8229,8231,8233,8235,8237,8240,8242,8244,8246,8249,8251,8253,8255,8258,8260],{"class":1052,"line":8213},135,[1050,8215,2564],{"class":1063},[1050,8217,8208],{"class":1067},[1050,8219,1072],{"class":1071},[1050,8221,2509],{"class":1247},[1050,8223,5894],{"class":1334},[1050,8225,8226],{"class":1071}," [",[1050,8228,1396],{"class":1355},[1050,8230,2364],{"class":1359},[1050,8232,1396],{"class":1355},[1050,8234,1123],{"class":1071},[1050,8236,2593],{"class":1355},[1050,8238,8239],{"class":1359},"PUT",[1050,8241,1396],{"class":1355},[1050,8243,1123],{"class":1071},[1050,8245,2593],{"class":1355},[1050,8247,8248],{"class":1359},"PATCH",[1050,8250,1396],{"class":1355},[1050,8252,1123],{"class":1071},[1050,8254,2593],{"class":1355},[1050,8256,8257],{"class":1359},"DELETE",[1050,8259,1396],{"class":1355},[1050,8261,1971],{"class":1071},[1050,8263,8265,8267,8269,8271,8273],{"class":1052,"line":8264},136,[1050,8266,6334],{"class":1063},[1050,8268,1755],{"class":1067},[1050,8270,1072],{"class":1071},[1050,8272,1760],{"class":1253},[1050,8274,1763],{"class":1071},[1050,8276,8278,8281,8283,8285,8287,8289,8291,8293],{"class":1052,"line":8277},137,[1050,8279,8280],{"class":1067},"                response ",[1050,8282,1240],{"class":1071},[1050,8284,3103],{"class":3060},[1050,8286,1072],{"class":1071},[1050,8288,8181],{"class":1253},[1050,8290,1188],{"class":1071},[1050,8292,2380],{"class":1253},[1050,8294,1273],{"class":1071},[1050,8296,8298],{"class":1052,"line":8297},138,[1050,8299,4745],{"class":1067},[1050,8301,8303],{"class":1052,"line":8302},139,[1050,8304,8305],{"class":1056},"                # Check for error responses and rollback if needed\n",[1050,8307,8309,8311,8314,8316,8319,8322,8325],{"class":1052,"line":8308},140,[1050,8310,7625],{"class":1063},[1050,8312,8313],{"class":1067}," response",[1050,8315,1072],{"class":1071},[1050,8317,8318],{"class":1247},"status_code",[1050,8320,8321],{"class":1334}," >=",[1050,8323,8324],{"class":1829}," 400",[1050,8326,1340],{"class":1071},[1050,8328,8330,8333,8335,8338,8340,8342],{"class":1052,"line":8329},141,[1050,8331,8332],{"class":1067},"                    transaction",[1050,8334,1072],{"class":1071},[1050,8336,8337],{"class":1253},"set_rollback",[1050,8339,1188],{"class":1071},[1050,8341,6369],{"class":1699},[1050,8343,1273],{"class":1071},[1050,8345,8347],{"class":1052,"line":8346},142,[1050,8348,4745],{"class":1067},[1050,8350,8352,8355],{"class":1052,"line":8351},143,[1050,8353,8354],{"class":1063},"                return",[1050,8356,8357],{"class":1067}," response\n",[1050,8359,8361,8363],{"class":1052,"line":8360},144,[1050,8362,2778],{"class":1063},[1050,8364,1340],{"class":1071},[1050,8366,8368],{"class":1052,"line":8367},145,[1050,8369,8370],{"class":1056},"            # Read-only requests don't need transactions\n",[1050,8372,8374,8376,8378,8380,8382,8384,8386],{"class":1052,"line":8373},146,[1050,8375,2734],{"class":1063},[1050,8377,3103],{"class":3060},[1050,8379,1072],{"class":1071},[1050,8381,8181],{"class":1253},[1050,8383,1188],{"class":1071},[1050,8385,2380],{"class":1253},[1050,8387,1273],{"class":1071},[1030,8389,8391],{"id":8390},"error-handling-and-recovery","Error Handling and Recovery",[1035,8393,8395],{"id":8394},"transaction-error-patterns","Transaction Error Patterns",[1040,8397,8399],{"className":1042,"code":8398,"language":1044,"meta":1045,"style":1045},"from django.db import transaction, IntegrityError, DatabaseError\nimport logging\n\nlogger = logging.getLogger(__name__)\n\nclass TransactionErrorHandling:\n    \"\"\"Patterns for handling transaction errors\"\"\"\n    \n    @staticmethod\n    def retry_on_deadlock(max_retries=3):\n        \"\"\"Decorator to retry operations on deadlock\"\"\"\n        \n        def decorator(func):\n            def wrapper(*args, **kwargs):\n                for attempt in range(max_retries):\n                    try:\n                        with transaction.atomic():\n                            return func(*args, **kwargs)\n                    \n                    except DatabaseError as e:\n                        if 'deadlock' in str(e).lower() and attempt \u003C max_retries - 1:\n                            logger.warning(f\"Deadlock detected, retrying ({attempt + 1}/{max_retries})\")\n                            time.sleep(0.1 * (2 ** attempt))  # Exponential backoff\n                            continue\n                        raise\n                \n                raise Exception(f\"Operation failed after {max_retries} attempts\")\n            \n            return wrapper\n        return decorator\n    \n    @staticmethod\n    @retry_on_deadlock(max_retries=3)\n    def concurrent_inventory_update(product_id, quantity_change):\n        \"\"\"Update inventory with deadlock retry\"\"\"\n        \n        product = Product.objects.select_for_update().get(id=product_id)\n        \n        new_quantity = product.stock_quantity + quantity_change\n        if new_quantity \u003C 0:\n            raise ValueError(\"Insufficient inventory\")\n        \n        product.stock_quantity = new_quantity\n        product.save()\n        \n        return product\n    \n    @staticmethod\n    def graceful_constraint_handling():\n        \"\"\"Handle constraint violations gracefully\"\"\"\n        \n        try:\n            with transaction.atomic():\n                # Attempt to create user\n                user = User.objects.create(\n                    username='newuser',\n                    email='user@example.com'\n                )\n                \n                # Create profile\n                UserProfile.objects.create(\n                    user=user,\n                    phone='123-456-7890'\n                )\n                \n                return user\n                \n        except IntegrityError as e:\n            if 'unique constraint' in str(e).lower():\n                # Handle duplicate user\n                logger.info(\"User already exists, returning existing user\")\n                return User.objects.get(email='user@example.com')\n            else:\n                # Re-raise other integrity errors\n                raise\n    \n    @staticmethod\n    def partial_failure_recovery(operations_data):\n        \"\"\"Handle partial failures in batch operations\"\"\"\n        \n        successful_operations = []\n        failed_operations = []\n        \n        for operation_data in operations_data:\n            try:\n                with transaction.atomic():\n                    result = perform_operation(operation_data)\n                    successful_operations.append({\n                        'operation': operation_data,\n                        'result': result\n                    })\n                    \n            except Exception as e:\n                failed_operations.append({\n                    'operation': operation_data,\n                    'error': str(e)\n                })\n                \n                # Log error but continue with other operations\n                logger.error(f\"Operation failed: {e}\", extra={\n                    'operation_data': operation_data\n                })\n        \n        return {\n            'successful': successful_operations,\n            'failed': failed_operations,\n            'success_rate': len(successful_operations) / len(operations_data)\n        }\n\n# Custom transaction context manager\nclass CustomTransactionManager:\n    \"\"\"Custom transaction manager with additional features\"\"\"\n    \n    def __init__(self, using=None, savepoint=True, rollback_on_error=True):\n        self.using = using\n        self.savepoint = savepoint\n        self.rollback_on_error = rollback_on_error\n        self.start_time = None\n        self.operation_log = []\n    \n    def __enter__(self):\n        self.start_time = time.time()\n        self.atomic = transaction.atomic(using=self.using, savepoint=self.savepoint)\n        return self.atomic.__enter__()\n    \n    def __exit__(self, exc_type, exc_value, traceback):\n        duration = time.time() - self.start_time\n        \n        if exc_type is not None:\n            logger.error(f\"Transaction failed after {duration:.2f}s: {exc_value}\")\n            \n            if self.rollback_on_error:\n                # Force rollback\n                transaction.set_rollback(True, using=self.using)\n        else:\n            logger.info(f\"Transaction completed successfully in {duration:.2f}s\")\n        \n        return self.atomic.__exit__(exc_type, exc_value, traceback)\n    \n    def log_operation(self, operation_name, **kwargs):\n        \"\"\"Log operation within transaction\"\"\"\n        self.operation_log.append({\n            'operation': operation_name,\n            'timestamp': time.time() - self.start_time,\n            'details': kwargs\n        })\n\n# Usage\ndef complex_operation_with_logging():\n    \"\"\"Example using custom transaction manager\"\"\"\n    \n    with CustomTransactionManager() as tx_manager:\n        tx_manager.log_operation('start', user_id=123)\n        \n        # Perform operations\n        user = User.objects.get(id=123)\n        tx_manager.log_operation('user_loaded', username=user.username)\n        \n        # Update user\n        user.last_login = timezone.now()\n        user.save()\n        tx_manager.log_operation('user_updated')\n        \n        # Create audit record\n        AuditLog.objects.create(\n            user=user,\n            action='login',\n            timestamp=timezone.now()\n        )\n        tx_manager.log_operation('audit_created')\n",[1047,8400,8401,8425,8432,8436,8459,8463,8472,8481,8485,8491,8510,8519,8523,8538,8563,8581,8588,8601,8623,8627,8641,8686,8729,8762,8767,8772,8776,8800,8804,8811,8818,8822,8828,8845,8863,8872,8876,8906,8910,8928,8941,8957,8961,8974,8984,8988,8995,8999,9005,9014,9023,9027,9033,9045,9050,9069,9085,9099,9104,9108,9113,9128,9139,9153,9157,9161,9167,9171,9184,9209,9214,9234,9262,9269,9274,9279,9283,9289,9303,9312,9316,9325,9334,9338,9352,9358,9370,9387,9398,9414,9428,9433,9437,9449,9460,9474,9492,9496,9500,9505,9536,9549,9553,9557,9563,9579,9594,9625,9630,9634,9639,9648,9657,9661,9701,9714,9727,9741,9755,9768,9772,9785,9805,9847,9864,9868,9896,9920,9924,9941,9981,9985,9997,10002,10029,10035,10063,10067,10097,10101,10125,10134,10148,10162,10191,10205,10210,10215,10221,10231,10241,10246,10262,10294,10299,10305,10332,10365,10370,10376,10397,10408,10428,10433,10439,10455,10466,10483,10499,10504],{"__ignoreMap":1045},[1050,8402,8403,8405,8407,8409,8411,8413,8415,8417,8420,8422],{"class":1052,"line":1053},[1050,8404,1064],{"class":1063},[1050,8406,1068],{"class":1067},[1050,8408,1072],{"class":1071},[1050,8410,1075],{"class":1067},[1050,8412,1078],{"class":1063},[1050,8414,1755],{"class":1067},[1050,8416,1123],{"class":1071},[1050,8418,8419],{"class":1067}," IntegrityError",[1050,8421,1123],{"class":1071},[1050,8423,8424],{"class":1067}," DatabaseError\n",[1050,8426,8427,8429],{"class":1052,"line":1060},[1050,8428,1078],{"class":1063},[1050,8430,8431],{"class":1067}," logging\n",[1050,8433,8434],{"class":1052,"line":1084},[1050,8435,1154],{"emptyLinePlaceholder":1153},[1050,8437,8438,8441,8443,8446,8448,8451,8453,8457],{"class":1052,"line":1106},[1050,8439,8440],{"class":1067},"logger ",[1050,8442,1240],{"class":1071},[1050,8444,8445],{"class":1067}," logging",[1050,8447,1072],{"class":1071},[1050,8449,8450],{"class":1253},"getLogger",[1050,8452,1188],{"class":1071},[1050,8454,8456],{"class":8455},"s131V","__name__",[1050,8458,1273],{"class":1071},[1050,8460,8461],{"class":1052,"line":1150},[1050,8462,1154],{"emptyLinePlaceholder":1153},[1050,8464,8465,8467,8470],{"class":1052,"line":1157},[1050,8466,2979],{"class":1181},[1050,8468,8469],{"class":2982}," TransactionErrorHandling",[1050,8471,1340],{"class":1071},[1050,8473,8474,8476,8479],{"class":1052,"line":1163},[1050,8475,1212],{"class":1211},[1050,8477,8478],{"class":1215},"Patterns for handling transaction errors",[1050,8480,1219],{"class":1211},[1050,8482,8483],{"class":1052,"line":1178},[1050,8484,1225],{"class":1067},[1050,8486,8487,8489],{"class":1052,"line":1208},[1050,8488,3010],{"class":1071},[1050,8490,6787],{"class":1349},[1050,8492,8493,8495,8498,8500,8503,8505,8508],{"class":1052,"line":1222},[1050,8494,3021],{"class":1181},[1050,8496,8497],{"class":1169}," retry_on_deadlock",[1050,8499,1188],{"class":1071},[1050,8501,8502],{"class":1191},"max_retries",[1050,8504,1240],{"class":1334},[1050,8506,8507],{"class":1829},"3",[1050,8509,1205],{"class":1071},[1050,8511,8512,8514,8517],{"class":1052,"line":1228},[1050,8513,3042],{"class":1211},[1050,8515,8516],{"class":1215},"Decorator to retry operations on deadlock",[1050,8518,1219],{"class":1211},[1050,8520,8521],{"class":1052,"line":1234},[1050,8522,1842],{"class":1067},[1050,8524,8525,8528,8531,8533,8536],{"class":1052,"line":1276},[1050,8526,8527],{"class":1181},"        def",[1050,8529,8530],{"class":1169}," decorator",[1050,8532,1188],{"class":1071},[1050,8534,8535],{"class":1191},"func",[1050,8537,1205],{"class":1071},[1050,8539,8540,8543,8546,8548,8550,8553,8555,8558,8561],{"class":1052,"line":1309},[1050,8541,8542],{"class":1181},"            def",[1050,8544,8545],{"class":1169}," wrapper",[1050,8547,1188],{"class":1071},[1050,8549,7640],{"class":1334},[1050,8551,8552],{"class":1191},"args",[1050,8554,1123],{"class":1071},[1050,8556,8557],{"class":1334}," **",[1050,8559,8560],{"class":1191},"kwargs",[1050,8562,1205],{"class":1071},[1050,8564,8565,8567,8570,8572,8575,8577,8579],{"class":1052,"line":1314},[1050,8566,7570],{"class":1063},[1050,8568,8569],{"class":1067}," attempt ",[1050,8571,1870],{"class":1063},[1050,8573,8574],{"class":4559}," range",[1050,8576,1188],{"class":1071},[1050,8578,8502],{"class":1253},[1050,8580,1205],{"class":1071},[1050,8582,8583,8586],{"class":1052,"line":1320},[1050,8584,8585],{"class":1063},"                    try",[1050,8587,1340],{"class":1071},[1050,8589,8590,8593,8595,8597,8599],{"class":1052,"line":1343},[1050,8591,8592],{"class":1063},"                        with",[1050,8594,1755],{"class":1067},[1050,8596,1072],{"class":1071},[1050,8598,1760],{"class":1253},[1050,8600,1763],{"class":1071},[1050,8602,8603,8606,8609,8611,8613,8615,8617,8619,8621],{"class":1052,"line":1367},[1050,8604,8605],{"class":1063},"                            return",[1050,8607,8608],{"class":1253}," func",[1050,8610,1188],{"class":1071},[1050,8612,7640],{"class":1334},[1050,8614,8552],{"class":1253},[1050,8616,1123],{"class":1071},[1050,8618,8557],{"class":1334},[1050,8620,8560],{"class":1253},[1050,8622,1273],{"class":1071},[1050,8624,8625],{"class":1052,"line":1372},[1050,8626,4628],{"class":1067},[1050,8628,8629,8632,8635,8637,8639],{"class":1052,"line":1378},[1050,8630,8631],{"class":1063},"                    except",[1050,8633,8634],{"class":1067}," DatabaseError ",[1050,8636,1129],{"class":1063},[1050,8638,2895],{"class":1067},[1050,8640,1340],{"class":1071},[1050,8642,8643,8646,8648,8651,8653,8655,8657,8659,8661,8663,8666,8668,8671,8673,8676,8679,8681,8684],{"class":1052,"line":1412},[1050,8644,8645],{"class":1063},"                        if",[1050,8647,2593],{"class":1355},[1050,8649,8650],{"class":1359},"deadlock",[1050,8652,1396],{"class":1355},[1050,8654,5894],{"class":1334},[1050,8656,2933],{"class":1349},[1050,8658,1188],{"class":1071},[1050,8660,2938],{"class":1253},[1050,8662,6372],{"class":1071},[1050,8664,8665],{"class":1253},"lower",[1050,8667,5759],{"class":1071},[1050,8669,8670],{"class":1334}," and",[1050,8672,8569],{"class":1067},[1050,8674,8675],{"class":1334},"\u003C",[1050,8677,8678],{"class":1067}," max_retries ",[1050,8680,1547],{"class":1334},[1050,8682,8683],{"class":1829}," 1",[1050,8685,1340],{"class":1071},[1050,8687,8688,8691,8693,8696,8698,8700,8703,8705,8708,8711,8713,8715,8718,8720,8722,8724,8727],{"class":1052,"line":1441},[1050,8689,8690],{"class":1067},"                            logger",[1050,8692,1072],{"class":1071},[1050,8694,8695],{"class":1253},"warning",[1050,8697,1188],{"class":1071},[1050,8699,1580],{"class":1181},[1050,8701,8702],{"class":1359},"\"Deadlock detected, retrying (",[1050,8704,1587],{"class":1586},[1050,8706,8707],{"class":1253},"attempt ",[1050,8709,8710],{"class":1334},"+",[1050,8712,8683],{"class":1829},[1050,8714,1592],{"class":1586},[1050,8716,8717],{"class":1359},"/",[1050,8719,1587],{"class":1586},[1050,8721,8502],{"class":1253},[1050,8723,1592],{"class":1586},[1050,8725,8726],{"class":1359},")\"",[1050,8728,1273],{"class":1071},[1050,8730,8731,8734,8736,8739,8741,8744,8746,8748,8751,8753,8756,8759],{"class":1052,"line":1446},[1050,8732,8733],{"class":1067},"                            time",[1050,8735,1072],{"class":1071},[1050,8737,8738],{"class":1253},"sleep",[1050,8740,1188],{"class":1071},[1050,8742,8743],{"class":1829},"0.1",[1050,8745,2196],{"class":1334},[1050,8747,7634],{"class":1071},[1050,8749,8750],{"class":1829},"2",[1050,8752,8557],{"class":1334},[1050,8754,8755],{"class":1253}," attempt",[1050,8757,8758],{"class":1071},"))",[1050,8760,8761],{"class":1056},"  # Exponential backoff\n",[1050,8763,8764],{"class":1052,"line":1473},[1050,8765,8766],{"class":1063},"                            continue\n",[1050,8768,8769],{"class":1052,"line":1496},[1050,8770,8771],{"class":1063},"                        raise\n",[1050,8773,8774],{"class":1052,"line":1501},[1050,8775,4745],{"class":1067},[1050,8777,8778,8780,8782,8784,8786,8789,8791,8793,8795,8798],{"class":1052,"line":1507},[1050,8779,1977],{"class":1063},[1050,8781,2889],{"class":1349},[1050,8783,1188],{"class":1071},[1050,8785,1580],{"class":1181},[1050,8787,8788],{"class":1359},"\"Operation failed after ",[1050,8790,1587],{"class":1586},[1050,8792,8502],{"class":1253},[1050,8794,1592],{"class":1586},[1050,8796,8797],{"class":1359}," attempts\"",[1050,8799,1273],{"class":1071},[1050,8801,8802],{"class":1052,"line":1525},[1050,8803,1934],{"class":1067},[1050,8805,8806,8808],{"class":1052,"line":1539},[1050,8807,2734],{"class":1063},[1050,8809,8810],{"class":1067}," wrapper\n",[1050,8812,8813,8815],{"class":1052,"line":1555},[1050,8814,2264],{"class":1063},[1050,8816,8817],{"class":1067}," decorator\n",[1050,8819,8820],{"class":1052,"line":1572},[1050,8821,1225],{"class":1067},[1050,8823,8824,8826],{"class":1052,"line":1598},[1050,8825,3010],{"class":1071},[1050,8827,6787],{"class":1349},[1050,8829,8830,8832,8835,8837,8839,8841,8843],{"class":1052,"line":1604},[1050,8831,3010],{"class":1071},[1050,8833,8834],{"class":1169},"retry_on_deadlock",[1050,8836,1188],{"class":1071},[1050,8838,8502],{"class":1265},[1050,8840,1240],{"class":1071},[1050,8842,8507],{"class":1829},[1050,8844,1273],{"class":1071},[1050,8846,8847,8849,8852,8854,8856,8858,8861],{"class":1052,"line":1609},[1050,8848,3021],{"class":1181},[1050,8850,8851],{"class":1169}," concurrent_inventory_update",[1050,8853,1188],{"class":1071},[1050,8855,1917],{"class":1191},[1050,8857,1123],{"class":1071},[1050,8859,8860],{"class":1191}," quantity_change",[1050,8862,1205],{"class":1071},[1050,8864,8865,8867,8870],{"class":1052,"line":1624},[1050,8866,3042],{"class":1211},[1050,8868,8869],{"class":1215},"Update inventory with deadlock retry",[1050,8871,1219],{"class":1211},[1050,8873,8874],{"class":1052,"line":1636},[1050,8875,1842],{"class":1067},[1050,8877,8878,8880,8882,8884,8886,8888,8890,8892,8894,8896,8898,8900,8902,8904],{"class":1052,"line":1647},[1050,8879,4016],{"class":1067},[1050,8881,1240],{"class":1071},[1050,8883,1137],{"class":1067},[1050,8885,1072],{"class":1071},[1050,8887,1248],{"class":1247},[1050,8889,1072],{"class":1071},[1050,8891,1254],{"class":1253},[1050,8893,1257],{"class":1071},[1050,8895,1260],{"class":1253},[1050,8897,1188],{"class":1071},[1050,8899,1266],{"class":1265},[1050,8901,1240],{"class":1071},[1050,8903,1917],{"class":1253},[1050,8905,1273],{"class":1071},[1050,8907,8908],{"class":1052,"line":1663},[1050,8909,1842],{"class":1067},[1050,8911,8912,8915,8917,8919,8921,8923,8925],{"class":1052,"line":1683},[1050,8913,8914],{"class":1067},"        new_quantity ",[1050,8916,1240],{"class":1071},[1050,8918,1949],{"class":1067},[1050,8920,1072],{"class":1071},[1050,8922,1954],{"class":1247},[1050,8924,1436],{"class":1334},[1050,8926,8927],{"class":1067}," quantity_change\n",[1050,8929,8930,8932,8935,8937,8939],{"class":1052,"line":1688},[1050,8931,2564],{"class":1063},[1050,8933,8934],{"class":1067}," new_quantity ",[1050,8936,8675],{"class":1334},[1050,8938,4491],{"class":1829},[1050,8940,1340],{"class":1071},[1050,8942,8943,8945,8947,8949,8951,8953,8955],{"class":1052,"line":1693},[1050,8944,4084],{"class":1063},[1050,8946,1350],{"class":1349},[1050,8948,1188],{"class":1071},[1050,8950,1356],{"class":1355},[1050,8952,5615],{"class":1359},[1050,8954,1356],{"class":1355},[1050,8956,1273],{"class":1071},[1050,8958,8959],{"class":1052,"line":1703},[1050,8960,1842],{"class":1067},[1050,8962,8963,8965,8967,8969,8971],{"class":1052,"line":1708},[1050,8964,4200],{"class":1067},[1050,8966,1072],{"class":1071},[1050,8968,1954],{"class":1247},[1050,8970,1388],{"class":1071},[1050,8972,8973],{"class":1067}," new_quantity\n",[1050,8975,8976,8978,8980,8982],{"class":1052,"line":1714},[1050,8977,4200],{"class":1067},[1050,8979,1072],{"class":1071},[1050,8981,1453],{"class":1253},[1050,8983,2633],{"class":1071},[1050,8985,8986],{"class":1052,"line":1734},[1050,8987,1842],{"class":1067},[1050,8989,8990,8992],{"class":1052,"line":1744},[1050,8991,2264],{"class":1063},[1050,8993,8994],{"class":1067}," product\n",[1050,8996,8997],{"class":1052,"line":1749},[1050,8998,1225],{"class":1067},[1050,9000,9001,9003],{"class":1052,"line":1766},[1050,9002,3010],{"class":1071},[1050,9004,6787],{"class":1349},[1050,9006,9007,9009,9012],{"class":1052,"line":1772},[1050,9008,3021],{"class":1181},[1050,9010,9011],{"class":1169}," graceful_constraint_handling",[1050,9013,1763],{"class":1071},[1050,9015,9016,9018,9021],{"class":1052,"line":1792},[1050,9017,3042],{"class":1211},[1050,9019,9020],{"class":1215},"Handle constraint violations gracefully",[1050,9022,1219],{"class":1211},[1050,9024,9025],{"class":1052,"line":1804},[1050,9026,1842],{"class":1067},[1050,9028,9029,9031],{"class":1052,"line":1821},[1050,9030,3634],{"class":1063},[1050,9032,1340],{"class":1071},[1050,9034,9035,9037,9039,9041,9043],{"class":1052,"line":1833},[1050,9036,6334],{"class":1063},[1050,9038,1755],{"class":1067},[1050,9040,1072],{"class":1071},[1050,9042,1760],{"class":1253},[1050,9044,1763],{"class":1071},[1050,9046,9047],{"class":1052,"line":1839},[1050,9048,9049],{"class":1056},"                # Attempt to create user\n",[1050,9051,9052,9055,9057,9059,9061,9063,9065,9067],{"class":1052,"line":1845},[1050,9053,9054],{"class":1067},"                user ",[1050,9056,1240],{"class":1071},[1050,9058,3519],{"class":1067},[1050,9060,1072],{"class":1071},[1050,9062,1248],{"class":1247},[1050,9064,1072],{"class":1071},[1050,9066,1519],{"class":1253},[1050,9068,1522],{"class":1071},[1050,9070,9071,9074,9076,9078,9081,9083],{"class":1052,"line":1856},[1050,9072,9073],{"class":1265},"                    username",[1050,9075,1240],{"class":1071},[1050,9077,1396],{"class":1355},[1050,9079,9080],{"class":1359},"newuser",[1050,9082,1396],{"class":1355},[1050,9084,1536],{"class":1071},[1050,9086,9087,9090,9092,9094,9097],{"class":1052,"line":1861},[1050,9088,9089],{"class":1265},"                    email",[1050,9091,1240],{"class":1071},[1050,9093,1396],{"class":1355},[1050,9095,9096],{"class":1359},"user@example.com",[1050,9098,1595],{"class":1355},[1050,9100,9101],{"class":1052,"line":1877},[1050,9102,9103],{"class":1071},"                )\n",[1050,9105,9106],{"class":1052,"line":1901},[1050,9107,4745],{"class":1067},[1050,9109,9110],{"class":1052,"line":1925},[1050,9111,9112],{"class":1056},"                # Create profile\n",[1050,9114,9115,9118,9120,9122,9124,9126],{"class":1052,"line":1931},[1050,9116,9117],{"class":1067},"                UserProfile",[1050,9119,1072],{"class":1071},[1050,9121,1248],{"class":1247},[1050,9123,1072],{"class":1071},[1050,9125,1519],{"class":1253},[1050,9127,1522],{"class":1071},[1050,9129,9130,9133,9135,9137],{"class":1052,"line":1937},[1050,9131,9132],{"class":1265},"                    user",[1050,9134,1240],{"class":1071},[1050,9136,2471],{"class":1253},[1050,9138,1536],{"class":1071},[1050,9140,9141,9144,9146,9148,9151],{"class":1052,"line":1943},[1050,9142,9143],{"class":1265},"                    phone",[1050,9145,1240],{"class":1071},[1050,9147,1396],{"class":1355},[1050,9149,9150],{"class":1359},"123-456-7890",[1050,9152,1595],{"class":1355},[1050,9154,9155],{"class":1052,"line":1974},[1050,9156,9103],{"class":1071},[1050,9158,9159],{"class":1052,"line":2005},[1050,9160,4745],{"class":1067},[1050,9162,9163,9165],{"class":1052,"line":2010},[1050,9164,8354],{"class":1063},[1050,9166,5157],{"class":1067},[1050,9168,9169],{"class":1052,"line":2016},[1050,9170,4745],{"class":1067},[1050,9172,9173,9175,9178,9180,9182],{"class":1052,"line":2037},[1050,9174,3875],{"class":1063},[1050,9176,9177],{"class":1067}," IntegrityError ",[1050,9179,1129],{"class":1063},[1050,9181,2895],{"class":1067},[1050,9183,1340],{"class":1071},[1050,9185,9186,9188,9190,9193,9195,9197,9199,9201,9203,9205,9207],{"class":1052,"line":2050},[1050,9187,1946],{"class":1063},[1050,9189,2593],{"class":1355},[1050,9191,9192],{"class":1359},"unique constraint",[1050,9194,1396],{"class":1355},[1050,9196,5894],{"class":1334},[1050,9198,2933],{"class":1349},[1050,9200,1188],{"class":1071},[1050,9202,2938],{"class":1253},[1050,9204,6372],{"class":1071},[1050,9206,8665],{"class":1253},[1050,9208,1763],{"class":1071},[1050,9210,9211],{"class":1052,"line":2062},[1050,9212,9213],{"class":1056},"                # Handle duplicate user\n",[1050,9215,9216,9219,9221,9223,9225,9227,9230,9232],{"class":1052,"line":2083},[1050,9217,9218],{"class":1067},"                logger",[1050,9220,1072],{"class":1071},[1050,9222,7661],{"class":1253},[1050,9224,1188],{"class":1071},[1050,9226,1356],{"class":1355},[1050,9228,9229],{"class":1359},"User already exists, returning existing user",[1050,9231,1356],{"class":1355},[1050,9233,1273],{"class":1071},[1050,9235,9236,9238,9240,9242,9244,9246,9248,9250,9252,9254,9256,9258,9260],{"class":1052,"line":2098},[1050,9237,8354],{"class":1063},[1050,9239,3519],{"class":1067},[1050,9241,1072],{"class":1071},[1050,9243,1248],{"class":1247},[1050,9245,1072],{"class":1071},[1050,9247,1260],{"class":1253},[1050,9249,1188],{"class":1071},[1050,9251,4822],{"class":1265},[1050,9253,1240],{"class":1071},[1050,9255,1396],{"class":1355},[1050,9257,9096],{"class":1359},[1050,9259,1396],{"class":1355},[1050,9261,1273],{"class":1071},[1050,9263,9264,9267],{"class":1052,"line":2103},[1050,9265,9266],{"class":1063},"            else",[1050,9268,1340],{"class":1071},[1050,9270,9271],{"class":1052,"line":2108},[1050,9272,9273],{"class":1056},"                # Re-raise other integrity errors\n",[1050,9275,9276],{"class":1052,"line":2114},[1050,9277,9278],{"class":1063},"                raise\n",[1050,9280,9281],{"class":1052,"line":2152},[1050,9282,1225],{"class":1067},[1050,9284,9285,9287],{"class":1052,"line":2175},[1050,9286,3010],{"class":1071},[1050,9288,6787],{"class":1349},[1050,9290,9291,9293,9296,9298,9301],{"class":1052,"line":2180},[1050,9292,3021],{"class":1181},[1050,9294,9295],{"class":1169}," partial_failure_recovery",[1050,9297,1188],{"class":1071},[1050,9299,9300],{"class":1191},"operations_data",[1050,9302,1205],{"class":1071},[1050,9304,9305,9307,9310],{"class":1052,"line":2206},[1050,9306,3042],{"class":1211},[1050,9308,9309],{"class":1215},"Handle partial failures in batch operations",[1050,9311,1219],{"class":1211},[1050,9313,9314],{"class":1052,"line":2211},[1050,9315,1842],{"class":1067},[1050,9317,9318,9321,9323],{"class":1052,"line":2217},[1050,9319,9320],{"class":1067},"        successful_operations ",[1050,9322,1240],{"class":1071},[1050,9324,4521],{"class":1071},[1050,9326,9327,9330,9332],{"class":1052,"line":2233},[1050,9328,9329],{"class":1067},"        failed_operations ",[1050,9331,1240],{"class":1071},[1050,9333,4521],{"class":1071},[1050,9335,9336],{"class":1052,"line":2256},[1050,9337,1842],{"class":1067},[1050,9339,9340,9342,9345,9347,9350],{"class":1052,"line":2261},[1050,9341,1864],{"class":1063},[1050,9343,9344],{"class":1067}," operation_data ",[1050,9346,1870],{"class":1063},[1050,9348,9349],{"class":1067}," operations_data",[1050,9351,1340],{"class":1071},[1050,9353,9354,9356],{"class":1052,"line":5364},[1050,9355,4571],{"class":1063},[1050,9357,1340],{"class":1071},[1050,9359,9360,9362,9364,9366,9368],{"class":1052,"line":5380},[1050,9361,3740],{"class":1063},[1050,9363,1755],{"class":1067},[1050,9365,1072],{"class":1071},[1050,9367,1760],{"class":1253},[1050,9369,1763],{"class":1071},[1050,9371,9372,9375,9377,9380,9382,9385],{"class":1052,"line":5392},[1050,9373,9374],{"class":1067},"                    result ",[1050,9376,1240],{"class":1071},[1050,9378,9379],{"class":1253}," perform_operation",[1050,9381,1188],{"class":1071},[1050,9383,9384],{"class":1253},"operation_data",[1050,9386,1273],{"class":1071},[1050,9388,9389,9392,9394,9396],{"class":1052,"line":5409},[1050,9390,9391],{"class":1067},"                    successful_operations",[1050,9393,1072],{"class":1071},[1050,9395,4683],{"class":1253},[1050,9397,4686],{"class":1071},[1050,9399,9400,9403,9406,9408,9410,9412],{"class":1052,"line":5414},[1050,9401,9402],{"class":1355},"                        '",[1050,9404,9405],{"class":1359},"operation",[1050,9407,1396],{"class":1355},[1050,9409,2749],{"class":1071},[1050,9411,3482],{"class":1253},[1050,9413,1536],{"class":1071},[1050,9415,9416,9418,9421,9423,9425],{"class":1052,"line":5419},[1050,9417,9402],{"class":1355},[1050,9419,9420],{"class":1359},"result",[1050,9422,1396],{"class":1355},[1050,9424,2749],{"class":1071},[1050,9426,9427],{"class":1253}," result\n",[1050,9429,9430],{"class":1052,"line":5425},[1050,9431,9432],{"class":1071},"                    })\n",[1050,9434,9435],{"class":1052,"line":6551},[1050,9436,4628],{"class":1067},[1050,9438,9439,9441,9443,9445,9447],{"class":1052,"line":6556},[1050,9440,4633],{"class":1063},[1050,9442,2889],{"class":1349},[1050,9444,2892],{"class":1063},[1050,9446,2895],{"class":1067},[1050,9448,1340],{"class":1071},[1050,9450,9451,9454,9456,9458],{"class":1052,"line":6570},[1050,9452,9453],{"class":1067},"                failed_operations",[1050,9455,1072],{"class":1071},[1050,9457,4683],{"class":1253},[1050,9459,4686],{"class":1071},[1050,9461,9462,9464,9466,9468,9470,9472],{"class":1052,"line":6582},[1050,9463,4691],{"class":1355},[1050,9465,9405],{"class":1359},[1050,9467,1396],{"class":1355},[1050,9469,2749],{"class":1071},[1050,9471,3482],{"class":1253},[1050,9473,1536],{"class":1071},[1050,9475,9476,9478,9480,9482,9484,9486,9488,9490],{"class":1052,"line":6587},[1050,9477,4691],{"class":1355},[1050,9479,2817],{"class":1359},[1050,9481,1396],{"class":1355},[1050,9483,2749],{"class":1071},[1050,9485,2933],{"class":1349},[1050,9487,1188],{"class":1071},[1050,9489,2938],{"class":1253},[1050,9491,1273],{"class":1071},[1050,9493,9494],{"class":1052,"line":6593},[1050,9495,4740],{"class":1071},[1050,9497,9498],{"class":1052,"line":6603},[1050,9499,4745],{"class":1067},[1050,9501,9502],{"class":1052,"line":6616},[1050,9503,9504],{"class":1056},"                # Log error but continue with other operations\n",[1050,9506,9507,9509,9511,9513,9515,9517,9520,9522,9524,9526,9528,9530,9533],{"class":1052,"line":6622},[1050,9508,9218],{"class":1067},[1050,9510,1072],{"class":1071},[1050,9512,2817],{"class":1253},[1050,9514,1188],{"class":1071},[1050,9516,1580],{"class":1181},[1050,9518,9519],{"class":1359},"\"Operation failed: ",[1050,9521,1587],{"class":1586},[1050,9523,2938],{"class":1253},[1050,9525,1592],{"class":1586},[1050,9527,1356],{"class":1359},[1050,9529,1123],{"class":1071},[1050,9531,9532],{"class":1265}," extra",[1050,9534,9535],{"class":1071},"={\n",[1050,9537,9538,9540,9542,9544,9546],{"class":1052,"line":6642},[1050,9539,4691],{"class":1355},[1050,9541,9384],{"class":1359},[1050,9543,1396],{"class":1355},[1050,9545,2749],{"class":1071},[1050,9547,9548],{"class":1253}," operation_data\n",[1050,9550,9551],{"class":1052,"line":6663},[1050,9552,4740],{"class":1071},[1050,9554,9555],{"class":1052,"line":6681},[1050,9556,1842],{"class":1067},[1050,9558,9559,9561],{"class":1052,"line":6686},[1050,9560,2264],{"class":1063},[1050,9562,4476],{"class":1071},[1050,9564,9565,9568,9570,9572,9574,9577],{"class":1052,"line":6692},[1050,9566,9567],{"class":1355},"            '",[1050,9569,4484],{"class":1359},[1050,9571,1396],{"class":1355},[1050,9573,2749],{"class":1071},[1050,9575,9576],{"class":1067}," successful_operations",[1050,9578,1536],{"class":1071},[1050,9580,9581,9583,9585,9587,9589,9592],{"class":1052,"line":7906},[1050,9582,9567],{"class":1355},[1050,9584,2795],{"class":1359},[1050,9586,1396],{"class":1355},[1050,9588,2749],{"class":1071},[1050,9590,9591],{"class":1067}," failed_operations",[1050,9593,1536],{"class":1071},[1050,9595,9596,9598,9601,9603,9605,9607,9609,9612,9614,9617,9619,9621,9623],{"class":1052,"line":7916},[1050,9597,9567],{"class":1355},[1050,9599,9600],{"class":1359},"success_rate",[1050,9602,1396],{"class":1355},[1050,9604,2749],{"class":1071},[1050,9606,7433],{"class":4559},[1050,9608,1188],{"class":1071},[1050,9610,9611],{"class":1253},"successful_operations",[1050,9613,1403],{"class":1071},[1050,9615,9616],{"class":1334}," /",[1050,9618,7433],{"class":4559},[1050,9620,1188],{"class":1071},[1050,9622,9300],{"class":1253},[1050,9624,1273],{"class":1071},[1050,9626,9627],{"class":1052,"line":7921},[1050,9628,9629],{"class":1071},"        }\n",[1050,9631,9632],{"class":1052,"line":7927},[1050,9633,1154],{"emptyLinePlaceholder":1153},[1050,9635,9636],{"class":1052,"line":7944},[1050,9637,9638],{"class":1056},"# Custom transaction context manager\n",[1050,9640,9641,9643,9646],{"class":1052,"line":7949},[1050,9642,2979],{"class":1181},[1050,9644,9645],{"class":2982}," CustomTransactionManager",[1050,9647,1340],{"class":1071},[1050,9649,9650,9652,9655],{"class":1052,"line":7956},[1050,9651,1212],{"class":1211},[1050,9653,9654],{"class":1215},"Custom transaction manager with additional features",[1050,9656,1219],{"class":1211},[1050,9658,9659],{"class":1052,"line":7962},[1050,9660,1225],{"class":1067},[1050,9662,9663,9665,9667,9669,9671,9673,9676,9678,9681,9683,9686,9688,9690,9692,9695,9697,9699],{"class":1052,"line":7996},[1050,9664,3021],{"class":1181},[1050,9666,8160],{"class":4559},[1050,9668,1188],{"class":1071},[1050,9670,3030],{"class":3029},[1050,9672,1123],{"class":1071},[1050,9674,9675],{"class":1191}," using",[1050,9677,1240],{"class":1334},[1050,9679,9680],{"class":1699},"None",[1050,9682,1123],{"class":1071},[1050,9684,9685],{"class":1191}," savepoint",[1050,9687,1240],{"class":1334},[1050,9689,6369],{"class":1699},[1050,9691,1123],{"class":1071},[1050,9693,9694],{"class":1191}," rollback_on_error",[1050,9696,1240],{"class":1334},[1050,9698,6369],{"class":1699},[1050,9700,1205],{"class":1071},[1050,9702,9703,9705,9707,9709,9711],{"class":1052,"line":8027},[1050,9704,3061],{"class":3060},[1050,9706,1072],{"class":1071},[1050,9708,7778],{"class":1247},[1050,9710,1388],{"class":1071},[1050,9712,9713],{"class":1067}," using\n",[1050,9715,9716,9718,9720,9722,9724],{"class":1052,"line":8032},[1050,9717,3061],{"class":3060},[1050,9719,1072],{"class":1071},[1050,9721,5261],{"class":1247},[1050,9723,1388],{"class":1071},[1050,9725,9726],{"class":1067}," savepoint\n",[1050,9728,9729,9731,9733,9736,9738],{"class":1052,"line":8038},[1050,9730,3061],{"class":3060},[1050,9732,1072],{"class":1071},[1050,9734,9735],{"class":1247},"rollback_on_error",[1050,9737,1388],{"class":1071},[1050,9739,9740],{"class":1067}," rollback_on_error\n",[1050,9742,9743,9745,9747,9750,9752],{"class":1052,"line":8049},[1050,9744,3061],{"class":3060},[1050,9746,1072],{"class":1071},[1050,9748,9749],{"class":1247},"start_time",[1050,9751,1388],{"class":1071},[1050,9753,9754],{"class":1699}," None\n",[1050,9756,9757,9759,9761,9764,9766],{"class":1052,"line":8054},[1050,9758,3061],{"class":3060},[1050,9760,1072],{"class":1071},[1050,9762,9763],{"class":1247},"operation_log",[1050,9765,1388],{"class":1071},[1050,9767,4521],{"class":1071},[1050,9769,9770],{"class":1052,"line":8067},[1050,9771,1225],{"class":1067},[1050,9773,9774,9776,9779,9781,9783],{"class":1052,"line":8073},[1050,9775,3021],{"class":1181},[1050,9777,9778],{"class":4559}," __enter__",[1050,9780,1188],{"class":1071},[1050,9782,3030],{"class":3029},[1050,9784,1205],{"class":1071},[1050,9786,9787,9789,9791,9793,9795,9798,9800,9803],{"class":1052,"line":8085},[1050,9788,3061],{"class":3060},[1050,9790,1072],{"class":1071},[1050,9792,9749],{"class":1247},[1050,9794,1388],{"class":1071},[1050,9796,9797],{"class":1067}," time",[1050,9799,1072],{"class":1071},[1050,9801,9802],{"class":1253},"time",[1050,9804,2633],{"class":1071},[1050,9806,9807,9809,9811,9813,9815,9817,9819,9821,9823,9825,9827,9829,9831,9833,9835,9837,9839,9841,9843,9845],{"class":1052,"line":8090},[1050,9808,3061],{"class":3060},[1050,9810,1072],{"class":1071},[1050,9812,1760],{"class":1247},[1050,9814,1388],{"class":1071},[1050,9816,1755],{"class":1067},[1050,9818,1072],{"class":1071},[1050,9820,1760],{"class":1253},[1050,9822,1188],{"class":1071},[1050,9824,7778],{"class":1265},[1050,9826,1240],{"class":1071},[1050,9828,3030],{"class":3060},[1050,9830,1072],{"class":1071},[1050,9832,7778],{"class":1247},[1050,9834,1123],{"class":1071},[1050,9836,9685],{"class":1265},[1050,9838,1240],{"class":1071},[1050,9840,3030],{"class":3060},[1050,9842,1072],{"class":1071},[1050,9844,5261],{"class":1247},[1050,9846,1273],{"class":1071},[1050,9848,9849,9851,9853,9855,9857,9859,9862],{"class":1052,"line":8098},[1050,9850,2264],{"class":1063},[1050,9852,3103],{"class":3060},[1050,9854,1072],{"class":1071},[1050,9856,1760],{"class":1247},[1050,9858,1072],{"class":1071},[1050,9860,9861],{"class":4559},"__enter__",[1050,9863,2633],{"class":1071},[1050,9865,9866],{"class":1052,"line":8104},[1050,9867,1225],{"class":1067},[1050,9869,9870,9872,9875,9877,9879,9881,9884,9886,9889,9891,9894],{"class":1052,"line":8119},[1050,9871,3021],{"class":1181},[1050,9873,9874],{"class":4559}," __exit__",[1050,9876,1188],{"class":1071},[1050,9878,3030],{"class":3029},[1050,9880,1123],{"class":1071},[1050,9882,9883],{"class":1191}," exc_type",[1050,9885,1123],{"class":1071},[1050,9887,9888],{"class":1191}," exc_value",[1050,9890,1123],{"class":1071},[1050,9892,9893],{"class":1191}," traceback",[1050,9895,1205],{"class":1071},[1050,9897,9898,9901,9903,9905,9907,9909,9911,9913,9915,9917],{"class":1052,"line":8124},[1050,9899,9900],{"class":1067},"        duration ",[1050,9902,1240],{"class":1071},[1050,9904,9797],{"class":1067},[1050,9906,1072],{"class":1071},[1050,9908,9802],{"class":1253},[1050,9910,5759],{"class":1071},[1050,9912,1406],{"class":1334},[1050,9914,3103],{"class":3060},[1050,9916,1072],{"class":1071},[1050,9918,9919],{"class":1247},"start_time\n",[1050,9921,9922],{"class":1052,"line":8130},[1050,9923,1842],{"class":1067},[1050,9925,9926,9928,9931,9934,9936,9939],{"class":1052,"line":8140},[1050,9927,2564],{"class":1063},[1050,9929,9930],{"class":1067}," exc_type ",[1050,9932,9933],{"class":1334},"is",[1050,9935,4808],{"class":1334},[1050,9937,9938],{"class":1699}," None",[1050,9940,1340],{"class":1071},[1050,9942,9943,9946,9948,9950,9952,9954,9957,9959,9962,9965,9967,9970,9972,9975,9977,9979],{"class":1052,"line":8150},[1050,9944,9945],{"class":1067},"            logger",[1050,9947,1072],{"class":1071},[1050,9949,2817],{"class":1253},[1050,9951,1188],{"class":1071},[1050,9953,1580],{"class":1181},[1050,9955,9956],{"class":1359},"\"Transaction failed after ",[1050,9958,1587],{"class":1586},[1050,9960,9961],{"class":1253},"duration",[1050,9963,9964],{"class":1181},":.2f",[1050,9966,1592],{"class":1586},[1050,9968,9969],{"class":1359},"s: ",[1050,9971,1587],{"class":1586},[1050,9973,9974],{"class":1253},"exc_value",[1050,9976,1592],{"class":1586},[1050,9978,1356],{"class":1359},[1050,9980,1273],{"class":1071},[1050,9982,9983],{"class":1052,"line":8155},[1050,9984,1934],{"class":1067},[1050,9986,9987,9989,9991,9993,9995],{"class":1052,"line":8174},[1050,9988,1946],{"class":1063},[1050,9990,3103],{"class":3060},[1050,9992,1072],{"class":1071},[1050,9994,9735],{"class":1247},[1050,9996,1340],{"class":1071},[1050,9998,9999],{"class":1052,"line":8189},[1050,10000,10001],{"class":1056},"                # Force rollback\n",[1050,10003,10004,10007,10009,10011,10013,10015,10017,10019,10021,10023,10025,10027],{"class":1052,"line":8194},[1050,10005,10006],{"class":1067},"                transaction",[1050,10008,1072],{"class":1071},[1050,10010,8337],{"class":1253},[1050,10012,1188],{"class":1071},[1050,10014,6369],{"class":1699},[1050,10016,1123],{"class":1071},[1050,10018,9675],{"class":1265},[1050,10020,1240],{"class":1071},[1050,10022,3030],{"class":3060},[1050,10024,1072],{"class":1071},[1050,10026,7778],{"class":1247},[1050,10028,1273],{"class":1071},[1050,10030,10031,10033],{"class":1052,"line":8213},[1050,10032,2778],{"class":1063},[1050,10034,1340],{"class":1071},[1050,10036,10037,10039,10041,10043,10045,10047,10050,10052,10054,10056,10058,10061],{"class":1052,"line":8264},[1050,10038,9945],{"class":1067},[1050,10040,1072],{"class":1071},[1050,10042,7661],{"class":1253},[1050,10044,1188],{"class":1071},[1050,10046,1580],{"class":1181},[1050,10048,10049],{"class":1359},"\"Transaction completed successfully in ",[1050,10051,1587],{"class":1586},[1050,10053,9961],{"class":1253},[1050,10055,9964],{"class":1181},[1050,10057,1592],{"class":1586},[1050,10059,10060],{"class":1359},"s\"",[1050,10062,1273],{"class":1071},[1050,10064,10065],{"class":1052,"line":8277},[1050,10066,1842],{"class":1067},[1050,10068,10069,10071,10073,10075,10077,10079,10082,10084,10087,10089,10091,10093,10095],{"class":1052,"line":8297},[1050,10070,2264],{"class":1063},[1050,10072,3103],{"class":3060},[1050,10074,1072],{"class":1071},[1050,10076,1760],{"class":1247},[1050,10078,1072],{"class":1071},[1050,10080,10081],{"class":4559},"__exit__",[1050,10083,1188],{"class":1071},[1050,10085,10086],{"class":1253},"exc_type",[1050,10088,1123],{"class":1071},[1050,10090,9888],{"class":1253},[1050,10092,1123],{"class":1071},[1050,10094,9893],{"class":1253},[1050,10096,1273],{"class":1071},[1050,10098,10099],{"class":1052,"line":8302},[1050,10100,1225],{"class":1067},[1050,10102,10103,10105,10108,10110,10112,10114,10117,10119,10121,10123],{"class":1052,"line":8308},[1050,10104,3021],{"class":1181},[1050,10106,10107],{"class":1169}," log_operation",[1050,10109,1188],{"class":1071},[1050,10111,3030],{"class":3029},[1050,10113,1123],{"class":1071},[1050,10115,10116],{"class":1191}," operation_name",[1050,10118,1123],{"class":1071},[1050,10120,8557],{"class":1334},[1050,10122,8560],{"class":1191},[1050,10124,1205],{"class":1071},[1050,10126,10127,10129,10132],{"class":1052,"line":8329},[1050,10128,3042],{"class":1211},[1050,10130,10131],{"class":1215},"Log operation within transaction",[1050,10133,1219],{"class":1211},[1050,10135,10136,10138,10140,10142,10144,10146],{"class":1052,"line":8346},[1050,10137,3061],{"class":3060},[1050,10139,1072],{"class":1071},[1050,10141,9763],{"class":1247},[1050,10143,1072],{"class":1071},[1050,10145,4683],{"class":1253},[1050,10147,4686],{"class":1071},[1050,10149,10150,10152,10154,10156,10158,10160],{"class":1052,"line":8351},[1050,10151,9567],{"class":1355},[1050,10153,9405],{"class":1359},[1050,10155,1396],{"class":1355},[1050,10157,2749],{"class":1071},[1050,10159,10116],{"class":1253},[1050,10161,1536],{"class":1071},[1050,10163,10164,10166,10169,10171,10173,10175,10177,10179,10181,10183,10185,10187,10189],{"class":1052,"line":8360},[1050,10165,9567],{"class":1355},[1050,10167,10168],{"class":1359},"timestamp",[1050,10170,1396],{"class":1355},[1050,10172,2749],{"class":1071},[1050,10174,9797],{"class":1253},[1050,10176,1072],{"class":1071},[1050,10178,9802],{"class":1253},[1050,10180,5759],{"class":1071},[1050,10182,1406],{"class":1334},[1050,10184,3103],{"class":3060},[1050,10186,1072],{"class":1071},[1050,10188,9749],{"class":1247},[1050,10190,1536],{"class":1071},[1050,10192,10193,10195,10198,10200,10202],{"class":1052,"line":8367},[1050,10194,9567],{"class":1355},[1050,10196,10197],{"class":1359},"details",[1050,10199,1396],{"class":1355},[1050,10201,2749],{"class":1071},[1050,10203,10204],{"class":1253}," kwargs\n",[1050,10206,10207],{"class":1052,"line":8373},[1050,10208,10209],{"class":1071},"        })\n",[1050,10211,10213],{"class":1052,"line":10212},147,[1050,10214,1154],{"emptyLinePlaceholder":1153},[1050,10216,10218],{"class":1052,"line":10217},148,[1050,10219,10220],{"class":1056},"# Usage\n",[1050,10222,10224,10226,10229],{"class":1052,"line":10223},149,[1050,10225,1182],{"class":1181},[1050,10227,10228],{"class":1169}," complex_operation_with_logging",[1050,10230,1763],{"class":1071},[1050,10232,10234,10236,10239],{"class":1052,"line":10233},150,[1050,10235,1212],{"class":1211},[1050,10237,10238],{"class":1215},"Example using custom transaction manager",[1050,10240,1219],{"class":1211},[1050,10242,10244],{"class":1052,"line":10243},151,[1050,10245,1225],{"class":1067},[1050,10247,10249,10251,10253,10255,10257,10260],{"class":1052,"line":10248},152,[1050,10250,1752],{"class":1063},[1050,10252,9645],{"class":1253},[1050,10254,5759],{"class":1071},[1050,10256,2892],{"class":1063},[1050,10258,10259],{"class":1067}," tx_manager",[1050,10261,1340],{"class":1071},[1050,10263,10265,10268,10270,10273,10275,10277,10280,10282,10284,10287,10289,10292],{"class":1052,"line":10264},153,[1050,10266,10267],{"class":1067},"        tx_manager",[1050,10269,1072],{"class":1071},[1050,10271,10272],{"class":1253},"log_operation",[1050,10274,1188],{"class":1071},[1050,10276,1396],{"class":1355},[1050,10278,10279],{"class":1359},"start",[1050,10281,1396],{"class":1355},[1050,10283,1123],{"class":1071},[1050,10285,10286],{"class":1265}," user_id",[1050,10288,1240],{"class":1071},[1050,10290,10291],{"class":1829},"123",[1050,10293,1273],{"class":1071},[1050,10295,10297],{"class":1052,"line":10296},154,[1050,10298,1842],{"class":1067},[1050,10300,10302],{"class":1052,"line":10301},155,[1050,10303,10304],{"class":1056},"        # Perform operations\n",[1050,10306,10308,10310,10312,10314,10316,10318,10320,10322,10324,10326,10328,10330],{"class":1052,"line":10307},156,[1050,10309,3514],{"class":1067},[1050,10311,1240],{"class":1071},[1050,10313,3519],{"class":1067},[1050,10315,1072],{"class":1071},[1050,10317,1248],{"class":1247},[1050,10319,1072],{"class":1071},[1050,10321,1260],{"class":1253},[1050,10323,1188],{"class":1071},[1050,10325,1266],{"class":1265},[1050,10327,1240],{"class":1071},[1050,10329,10291],{"class":1829},[1050,10331,1273],{"class":1071},[1050,10333,10335,10337,10339,10341,10343,10345,10348,10350,10352,10355,10357,10359,10361,10363],{"class":1052,"line":10334},157,[1050,10336,10267],{"class":1067},[1050,10338,1072],{"class":1071},[1050,10340,10272],{"class":1253},[1050,10342,1188],{"class":1071},[1050,10344,1396],{"class":1355},[1050,10346,10347],{"class":1359},"user_loaded",[1050,10349,1396],{"class":1355},[1050,10351,1123],{"class":1071},[1050,10353,10354],{"class":1265}," username",[1050,10356,1240],{"class":1071},[1050,10358,2471],{"class":1253},[1050,10360,1072],{"class":1071},[1050,10362,4968],{"class":1247},[1050,10364,1273],{"class":1071},[1050,10366,10368],{"class":1052,"line":10367},158,[1050,10369,1842],{"class":1067},[1050,10371,10373],{"class":1052,"line":10372},159,[1050,10374,10375],{"class":1056},"        # Update user\n",[1050,10377,10379,10381,10383,10386,10388,10391,10393,10395],{"class":1052,"line":10378},160,[1050,10380,4284],{"class":1067},[1050,10382,1072],{"class":1071},[1050,10384,10385],{"class":1247},"last_login",[1050,10387,1388],{"class":1071},[1050,10389,10390],{"class":1067}," timezone",[1050,10392,1072],{"class":1071},[1050,10394,5756],{"class":1253},[1050,10396,2633],{"class":1071},[1050,10398,10400,10402,10404,10406],{"class":1052,"line":10399},161,[1050,10401,4284],{"class":1067},[1050,10403,1072],{"class":1071},[1050,10405,1453],{"class":1253},[1050,10407,2633],{"class":1071},[1050,10409,10411,10413,10415,10417,10419,10421,10424,10426],{"class":1052,"line":10410},162,[1050,10412,10267],{"class":1067},[1050,10414,1072],{"class":1071},[1050,10416,10272],{"class":1253},[1050,10418,1188],{"class":1071},[1050,10420,1396],{"class":1355},[1050,10422,10423],{"class":1359},"user_updated",[1050,10425,1396],{"class":1355},[1050,10427,1273],{"class":1071},[1050,10429,10431],{"class":1052,"line":10430},163,[1050,10432,1842],{"class":1067},[1050,10434,10436],{"class":1052,"line":10435},164,[1050,10437,10438],{"class":1056},"        # Create audit record\n",[1050,10440,10442,10445,10447,10449,10451,10453],{"class":1052,"line":10441},165,[1050,10443,10444],{"class":1067},"        AuditLog",[1050,10446,1072],{"class":1071},[1050,10448,1248],{"class":1247},[1050,10450,1072],{"class":1071},[1050,10452,1519],{"class":1253},[1050,10454,1522],{"class":1071},[1050,10456,10458,10460,10462,10464],{"class":1052,"line":10457},166,[1050,10459,2462],{"class":1265},[1050,10461,1240],{"class":1071},[1050,10463,2471],{"class":1253},[1050,10465,1536],{"class":1071},[1050,10467,10469,10472,10474,10476,10479,10481],{"class":1052,"line":10468},167,[1050,10470,10471],{"class":1265},"            action",[1050,10473,1240],{"class":1071},[1050,10475,1396],{"class":1355},[1050,10477,10478],{"class":1359},"login",[1050,10480,1396],{"class":1355},[1050,10482,1536],{"class":1071},[1050,10484,10486,10489,10491,10493,10495,10497],{"class":1052,"line":10485},168,[1050,10487,10488],{"class":1265},"            timestamp",[1050,10490,1240],{"class":1071},[1050,10492,5751],{"class":1253},[1050,10494,1072],{"class":1071},[1050,10496,5756],{"class":1253},[1050,10498,2633],{"class":1071},[1050,10500,10502],{"class":1052,"line":10501},169,[1050,10503,1836],{"class":1071},[1050,10505,10507,10509,10511,10513,10515,10517,10520,10522],{"class":1052,"line":10506},170,[1050,10508,10267],{"class":1067},[1050,10510,1072],{"class":1071},[1050,10512,10272],{"class":1253},[1050,10514,1188],{"class":1071},[1050,10516,1396],{"class":1355},[1050,10518,10519],{"class":1359},"audit_created",[1050,10521,1396],{"class":1355},[1050,10523,1273],{"class":1071},[1026,10525,10526],{},"Understanding Django's transaction system enables you to build robust applications that maintain data consistency even under concurrent access and error conditions. Proper transaction management is crucial for financial applications, inventory systems, and any scenario where data integrity is paramount.",[10528,10529,10530],"style",{},"html pre.shiki code .s9Tkl, html code.shiki .s9Tkl{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#A0ADA0;--shiki-default-font-style:inherit;--shiki-dark:#758575DD;--shiki-dark-font-style:inherit}html pre.shiki code .siDh9, html code.shiki .siDh9{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#1E754F;--shiki-default-font-style:inherit;--shiki-dark:#4D9375;--shiki-dark-font-style:inherit}html pre.shiki code .sftqT, html code.shiki .sftqT{--shiki-light:#90A4AE;--shiki-default:#393A34;--shiki-dark:#DBD7CAEE}html pre.shiki code .soVBu, html code.shiki .soVBu{--shiki-light:#39ADB5;--shiki-default:#999999;--shiki-dark:#666666}html pre.shiki code .sljsM, html code.shiki .sljsM{--shiki-light:#6182B8;--shiki-default:#59873A;--shiki-dark:#80A665}html pre.shiki code .s5Kfy, html code.shiki .s5Kfy{--shiki-light:#9C3EDA;--shiki-default:#AB5959;--shiki-dark:#CB7676}html pre.shiki code .sCyAa, html code.shiki .sCyAa{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#393A34;--shiki-default-font-style:inherit;--shiki-dark:#DBD7CAEE;--shiki-dark-font-style:inherit}html pre.shiki code .sm7ve, html code.shiki .sm7ve{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#B5695977;--shiki-default-font-style:inherit;--shiki-dark:#C98A7D77;--shiki-dark-font-style:inherit}html pre.shiki code .sVyVU, html code.shiki .sVyVU{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#B56959;--shiki-default-font-style:inherit;--shiki-dark:#C98A7D;--shiki-dark-font-style:inherit}html pre.shiki code .sBPpx, html code.shiki .sBPpx{--shiki-light:#E53935;--shiki-default:#393A34;--shiki-dark:#DBD7CAEE}html pre.shiki code .siWMO, html code.shiki .siWMO{--shiki-light:#6182B8;--shiki-default:#393A34;--shiki-dark:#DBD7CAEE}html pre.shiki code .sqOPj, html code.shiki .sqOPj{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#B07D48;--shiki-default-font-style:inherit;--shiki-dark:#BD976A;--shiki-dark-font-style:inherit}html pre.shiki code .sVsLi, html code.shiki .sVsLi{--shiki-light:#39ADB5;--shiki-default:#AB5959;--shiki-dark:#CB7676}html pre.shiki code .sa2tF, html code.shiki .sa2tF{--shiki-light:#E2931D;--shiki-default:#998418;--shiki-dark:#B8A965}html pre.shiki code .sbYkP, html code.shiki .sbYkP{--shiki-light:#39ADB5;--shiki-default:#B5695977;--shiki-dark:#C98A7D77}html pre.shiki code .sTbE_, html code.shiki .sTbE_{--shiki-light:#91B859;--shiki-default:#B56959;--shiki-dark:#C98A7D}html pre.shiki code .s3h35, html code.shiki .s3h35{--shiki-light:#F76D47;--shiki-default:#A65E2B;--shiki-dark:#C99076}html pre.shiki code .s8XtY, html code.shiki .s8XtY{--shiki-light:#39ADB5;--shiki-default:#1E754F;--shiki-dark:#4D9375}html pre.shiki code .s7CZa, html code.shiki .s7CZa{--shiki-light:#F76D47;--shiki-default:#2F798A;--shiki-dark:#4C9A91}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sD-vU, html code.shiki .sD-vU{--shiki-light:#E2931D;--shiki-default:#2E8F82;--shiki-dark:#5DA994}html pre.shiki code .sYn-s, html code.shiki .sYn-s{--shiki-light:#E2931D;--shiki-default:#59873A;--shiki-dark:#80A665}html pre.shiki code .sRjD_, html code.shiki .sRjD_{--shiki-light:#E53935;--shiki-light-font-style:italic;--shiki-default:#393A34;--shiki-default-font-style:inherit;--shiki-dark:#DBD7CAEE;--shiki-dark-font-style:inherit}html pre.shiki code .se3Ec, html code.shiki .se3Ec{--shiki-light:#90A4AE;--shiki-default:#A65E2B;--shiki-dark:#C99076}html pre.shiki code .sJdAF, html code.shiki .sJdAF{--shiki-light:#6182B8;--shiki-default:#998418;--shiki-dark:#B8A965}html pre.shiki code .s131V, html code.shiki .s131V{--shiki-light:#90A4AE;--shiki-default:#998418;--shiki-dark:#B8A965}",{"title":1045,"searchDepth":1053,"depth":1060,"links":10532},[10533,10536,10540,10543,10546,10549],{"id":1032,"depth":1060,"text":1033,"children":10534},[10535],{"id":1037,"depth":1084,"text":1038},{"id":2270,"depth":1060,"text":2271,"children":10537},[10538,10539],{"id":2274,"depth":1084,"text":2275},{"id":3441,"depth":1084,"text":3442},{"id":4411,"depth":1060,"text":4412,"children":10541},[10542],{"id":4415,"depth":1084,"text":4416},{"id":5437,"depth":1060,"text":5438,"children":10544},[10545],{"id":5441,"depth":1084,"text":5442},{"id":6730,"depth":1060,"text":6731,"children":10547},[10548],{"id":6734,"depth":1084,"text":6735},{"id":8390,"depth":1060,"text":8391,"children":10550},[10551],{"id":8394,"depth":1084,"text":8395},"md",null,{},{"title":300,"description":1028},"5AcVnFXWp8uGQsskbVeVFGQ99z32zG-y84dj_azd5H0",[10558,10560],{"title":296,"path":297,"stem":298,"description":10559,"children":-1},"While Django's ORM handles most database operations elegantly, there are times when you need the power and flexibility of raw SQL. Understanding how to safely execute raw SQL queries enables you to optimize performance, use database-specific features, and handle complex operations that are difficult to express with the ORM.",{"title":304,"path":305,"stem":306,"description":10561,"children":-1},"Django supports using multiple databases in a single application, enabling you to separate different types of data, implement read/write splitting, or integrate with legacy systems. Understanding how to configure and use multiple databases effectively is crucial for scalable applications.",1772474920135]