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DEVELOPMENT","/releases/6.1","releases/6.1",{"id":1017,"title":350,"body":1018,"description":1028,"extension":9662,"links":9663,"meta":9664,"navigation":1365,"path":351,"seo":9665,"stem":352,"__hash__":9666},"docs/08.migrations/05.transaction-handling.md",{"type":1019,"value":1020,"toc":9647},"minimark",[1021,1025,1029,1034,1039,1934,1938,3527,3531,3535,5938,5942,5946,7902,7906,7910,9640,9643],[1022,1023,350],"h1",{"id":1024},"transaction-handling",[1026,1027,1028],"p",{},"Django migrations run within database transactions by default, providing atomicity and consistency during schema changes. Understanding transaction behavior in migrations is crucial for maintaining data integrity and handling complex migration scenarios safely.",[1030,1031,1033],"h2",{"id":1032},"migration-atomicity","Migration Atomicity",[1035,1036,1038],"h3",{"id":1037},"default-transaction-behavior","Default Transaction Behavior",[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","# By default, migrations run in a single transaction\nclass Migration(migrations.Migration):\n    \"\"\"Standard atomic migration\"\"\"\n    \n    dependencies = [\n        ('blog', '0001_initial'),\n    ]\n    \n    # atomic = True is the default\n    atomic = True\n    \n    operations = [\n        migrations.AddField(\n            model_name='post',\n            name='view_count',\n            field=models.PositiveIntegerField(default=0),\n        ),\n        migrations.AddField(\n            model_name='post',\n            name='like_count',\n            field=models.PositiveIntegerField(default=0),\n        ),\n        # All operations succeed or all fail together\n    ]\n\n# Non-atomic migration for special cases\nclass Migration(migrations.Migration):\n    \"\"\"Non-atomic migration for operations that can't run in transactions\"\"\"\n    \n    dependencies = [\n        ('blog', '0002_add_counters'),\n    ]\n    \n    # Disable atomicity for this migration\n    atomic = False\n    \n    operations = [\n        # PostgreSQL: CREATE INDEX CONCURRENTLY cannot run in transaction\n        migrations.RunSQL(\n            sql=\"CREATE INDEX CONCURRENTLY idx_post_title_gin ON blog_post USING gin(to_tsvector('english', title));\",\n            reverse_sql=\"DROP INDEX IF EXISTS idx_post_title_gin;\",\n        ),\n    ]\n\n# Database-specific atomic behavior\nclass DatabaseSpecificMigration(migrations.Migration):\n    \"\"\"Handle atomicity differently per database\"\"\"\n    \n    dependencies = [\n        ('blog', '0003_add_search_index'),\n    ]\n    \n    def __init__(self, name, app_label):\n        super().__init__(name, app_label)\n        \n        # Set atomicity based on database backend\n        from django.db import connection\n        \n        if connection.vendor == 'postgresql':\n            # PostgreSQL supports most operations in transactions\n            self.atomic = True\n        elif connection.vendor == 'mysql':\n            # MySQL has limitations with DDL in transactions\n            self.atomic = False\n        else:\n            # Default behavior for other databases\n            self.atomic = True\n    \n    operations = [\n        migrations.AddIndex(\n            model_name='post',\n            index=models.Index(fields=['created_at'], name='idx_post_created'),\n        ),\n    ]\n","python","",[1047,1048,1049,1058,1086,1100,1107,1119,1149,1155,1160,1166,1178,1183,1193,1208,1227,1244,1273,1279,1290,1305,1321,1344,1349,1355,1360,1367,1373,1390,1400,1405,1414,1436,1441,1446,1452,1462,1467,1476,1482,1494,1512,1529,1534,1539,1544,1550,1568,1578,1583,1592,1614,1619,1624,1653,1678,1684,1690,1711,1716,1745,1751,1768,1791,1797,1810,1818,1824,1837,1842,1851,1863,1878,1924,1929],"code",{"__ignoreMap":1045},[1050,1051,1054],"span",{"class":1052,"line":1053},"line",1,[1050,1055,1057],{"class":1056},"s9Tkl","# By default, migrations run in a single transaction\n",[1050,1059,1061,1065,1069,1073,1077,1080,1083],{"class":1052,"line":1060},2,[1050,1062,1064],{"class":1063},"s5Kfy","class",[1050,1066,1068],{"class":1067},"sD-vU"," 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(",[1050,1126,1128],{"class":1127},"sbYkP","'",[1050,1130,1132],{"class":1131},"sTbE_","blog",[1050,1134,1128],{"class":1127},[1050,1136,1137],{"class":1071},",",[1050,1139,1140],{"class":1127}," '",[1050,1142,1143],{"class":1131},"0001_initial",[1050,1145,1128],{"class":1127},[1050,1147,1148],{"class":1071},"),\n",[1050,1150,1152],{"class":1052,"line":1151},7,[1050,1153,1154],{"class":1071},"    ]\n",[1050,1156,1158],{"class":1052,"line":1157},8,[1050,1159,1106],{"class":1105},[1050,1161,1163],{"class":1052,"line":1162},9,[1050,1164,1165],{"class":1056},"    # atomic = True is the default\n",[1050,1167,1169,1172,1174],{"class":1052,"line":1168},10,[1050,1170,1171],{"class":1105},"    atomic ",[1050,1173,1115],{"class":1071},[1050,1175,1177],{"class":1176},"s8XtY"," True\n",[1050,1179,1181],{"class":1052,"line":1180},11,[1050,1182,1106],{"class":1105},[1050,1184,1186,1189,1191],{"class":1052,"line":1185},12,[1050,1187,1188],{"class":1105},"    operations ",[1050,1190,1115],{"class":1071},[1050,1192,1118],{"class":1071},[1050,1194,1196,1199,1201,1205],{"class":1052,"line":1195},13,[1050,1197,1198],{"class":1105},"        migrations",[1050,1200,1079],{"class":1071},[1050,1202,1204],{"class":1203},"siWMO","AddField",[1050,1206,1207],{"class":1071},"(\n",[1050,1209,1211,1215,1217,1219,1222,1224],{"class":1052,"line":1210},14,[1050,1212,1214],{"class":1213},"sqOPj","            model_name",[1050,1216,1115],{"class":1071},[1050,1218,1128],{"class":1127},[1050,1220,1221],{"class":1131},"post",[1050,1223,1128],{"class":1127},[1050,1225,1226],{"class":1071},",\n",[1050,1228,1230,1233,1235,1237,1240,1242],{"class":1052,"line":1229},15,[1050,1231,1232],{"class":1213},"            name",[1050,1234,1115],{"class":1071},[1050,1236,1128],{"class":1127},[1050,1238,1239],{"class":1131},"view_count",[1050,1241,1128],{"class":1127},[1050,1243,1226],{"class":1071},[1050,1245,1247,1250,1252,1255,1257,1260,1262,1265,1267,1271],{"class":1052,"line":1246},16,[1050,1248,1249],{"class":1213},"            field",[1050,1251,1115],{"class":1071},[1050,1253,1254],{"class":1203},"models",[1050,1256,1079],{"class":1071},[1050,1258,1259],{"class":1203},"PositiveIntegerField",[1050,1261,1072],{"class":1071},[1050,1263,1264],{"class":1213},"default",[1050,1266,1115],{"class":1071},[1050,1268,1270],{"class":1269},"s7CZa","0",[1050,1272,1148],{"class":1071},[1050,1274,1276],{"class":1052,"line":1275},17,[1050,1277,1278],{"class":1071},"        ),\n",[1050,1280,1282,1284,1286,1288],{"class":1052,"line":1281},18,[1050,1283,1198],{"class":1105},[1050,1285,1079],{"class":1071},[1050,1287,1204],{"class":1203},[1050,1289,1207],{"class":1071},[1050,1291,1293,1295,1297,1299,1301,1303],{"class":1052,"line":1292},19,[1050,1294,1214],{"class":1213},[1050,1296,1115],{"class":1071},[1050,1298,1128],{"class":1127},[1050,1300,1221],{"class":1131},[1050,1302,1128],{"class":1127},[1050,1304,1226],{"class":1071},[1050,1306,1308,1310,1312,1314,1317,1319],{"class":1052,"line":1307},20,[1050,1309,1232],{"class":1213},[1050,1311,1115],{"class":1071},[1050,1313,1128],{"class":1127},[1050,1315,1316],{"class":1131},"like_count",[1050,1318,1128],{"class":1127},[1050,1320,1226],{"class":1071},[1050,1322,1324,1326,1328,1330,1332,1334,1336,1338,1340,1342],{"class":1052,"line":1323},21,[1050,1325,1249],{"class":1213},[1050,1327,1115],{"class":1071},[1050,1329,1254],{"class":1203},[1050,1331,1079],{"class":1071},[1050,1333,1259],{"class":1203},[1050,1335,1072],{"class":1071},[1050,1337,1264],{"class":1213},[1050,1339,1115],{"class":1071},[1050,1341,1270],{"class":1269},[1050,1343,1148],{"class":1071},[1050,1345,1347],{"class":1052,"line":1346},22,[1050,1348,1278],{"class":1071},[1050,1350,1352],{"class":1052,"line":1351},23,[1050,1353,1354],{"class":1056},"        # All operations succeed or all fail together\n",[1050,1356,1358],{"class":1052,"line":1357},24,[1050,1359,1154],{"class":1071},[1050,1361,1363],{"class":1052,"line":1362},25,[1050,1364,1366],{"emptyLinePlaceholder":1365},true,"\n",[1050,1368,1370],{"class":1052,"line":1369},26,[1050,1371,1372],{"class":1056},"# Non-atomic migration for special cases\n",[1050,1374,1376,1378,1380,1382,1384,1386,1388],{"class":1052,"line":1375},27,[1050,1377,1064],{"class":1063},[1050,1379,1068],{"class":1067},[1050,1381,1072],{"class":1071},[1050,1383,1076],{"class":1075},[1050,1385,1079],{"class":1071},[1050,1387,1082],{"class":1075},[1050,1389,1085],{"class":1071},[1050,1391,1393,1395,1398],{"class":1052,"line":1392},28,[1050,1394,1092],{"class":1091},[1050,1396,1397],{"class":1095},"Non-atomic migration for operations that can't run in transactions",[1050,1399,1099],{"class":1091},[1050,1401,1403],{"class":1052,"line":1402},29,[1050,1404,1106],{"class":1105},[1050,1406,1408,1410,1412],{"class":1052,"line":1407},30,[1050,1409,1112],{"class":1105},[1050,1411,1115],{"class":1071},[1050,1413,1118],{"class":1071},[1050,1415,1417,1419,1421,1423,1425,1427,1429,1432,1434],{"class":1052,"line":1416},31,[1050,1418,1124],{"class":1071},[1050,1420,1128],{"class":1127},[1050,1422,1132],{"class":1131},[1050,1424,1128],{"class":1127},[1050,1426,1137],{"class":1071},[1050,1428,1140],{"class":1127},[1050,1430,1431],{"class":1131},"0002_add_counters",[1050,1433,1128],{"class":1127},[1050,1435,1148],{"class":1071},[1050,1437,1439],{"class":1052,"line":1438},32,[1050,1440,1154],{"class":1071},[1050,1442,1444],{"class":1052,"line":1443},33,[1050,1445,1106],{"class":1105},[1050,1447,1449],{"class":1052,"line":1448},34,[1050,1450,1451],{"class":1056},"    # Disable atomicity for this migration\n",[1050,1453,1455,1457,1459],{"class":1052,"line":1454},35,[1050,1456,1171],{"class":1105},[1050,1458,1115],{"class":1071},[1050,1460,1461],{"class":1176}," False\n",[1050,1463,1465],{"class":1052,"line":1464},36,[1050,1466,1106],{"class":1105},[1050,1468,1470,1472,1474],{"class":1052,"line":1469},37,[1050,1471,1188],{"class":1105},[1050,1473,1115],{"class":1071},[1050,1475,1118],{"class":1071},[1050,1477,1479],{"class":1052,"line":1478},38,[1050,1480,1481],{"class":1056},"        # PostgreSQL: CREATE INDEX CONCURRENTLY cannot run in transaction\n",[1050,1483,1485,1487,1489,1492],{"class":1052,"line":1484},39,[1050,1486,1198],{"class":1105},[1050,1488,1079],{"class":1071},[1050,1490,1491],{"class":1203},"RunSQL",[1050,1493,1207],{"class":1071},[1050,1495,1497,1500,1502,1505,1508,1510],{"class":1052,"line":1496},40,[1050,1498,1499],{"class":1213},"            sql",[1050,1501,1115],{"class":1071},[1050,1503,1504],{"class":1127},"\"",[1050,1506,1507],{"class":1131},"CREATE INDEX CONCURRENTLY idx_post_title_gin ON blog_post USING gin(to_tsvector('english', title));",[1050,1509,1504],{"class":1127},[1050,1511,1226],{"class":1071},[1050,1513,1515,1518,1520,1522,1525,1527],{"class":1052,"line":1514},41,[1050,1516,1517],{"class":1213},"            reverse_sql",[1050,1519,1115],{"class":1071},[1050,1521,1504],{"class":1127},[1050,1523,1524],{"class":1131},"DROP INDEX IF EXISTS idx_post_title_gin;",[1050,1526,1504],{"class":1127},[1050,1528,1226],{"class":1071},[1050,1530,1532],{"class":1052,"line":1531},42,[1050,1533,1278],{"class":1071},[1050,1535,1537],{"class":1052,"line":1536},43,[1050,1538,1154],{"class":1071},[1050,1540,1542],{"class":1052,"line":1541},44,[1050,1543,1366],{"emptyLinePlaceholder":1365},[1050,1545,1547],{"class":1052,"line":1546},45,[1050,1548,1549],{"class":1056},"# Database-specific atomic behavior\n",[1050,1551,1553,1555,1558,1560,1562,1564,1566],{"class":1052,"line":1552},46,[1050,1554,1064],{"class":1063},[1050,1556,1557],{"class":1067}," DatabaseSpecificMigration",[1050,1559,1072],{"class":1071},[1050,1561,1076],{"class":1075},[1050,1563,1079],{"class":1071},[1050,1565,1082],{"class":1075},[1050,1567,1085],{"class":1071},[1050,1569,1571,1573,1576],{"class":1052,"line":1570},47,[1050,1572,1092],{"class":1091},[1050,1574,1575],{"class":1095},"Handle atomicity differently per database",[1050,1577,1099],{"class":1091},[1050,1579,1581],{"class":1052,"line":1580},48,[1050,1582,1106],{"class":1105},[1050,1584,1586,1588,1590],{"class":1052,"line":1585},49,[1050,1587,1112],{"class":1105},[1050,1589,1115],{"class":1071},[1050,1591,1118],{"class":1071},[1050,1593,1595,1597,1599,1601,1603,1605,1607,1610,1612],{"class":1052,"line":1594},50,[1050,1596,1124],{"class":1071},[1050,1598,1128],{"class":1127},[1050,1600,1132],{"class":1131},[1050,1602,1128],{"class":1127},[1050,1604,1137],{"class":1071},[1050,1606,1140],{"class":1127},[1050,1608,1609],{"class":1131},"0003_add_search_index",[1050,1611,1128],{"class":1127},[1050,1613,1148],{"class":1071},[1050,1615,1617],{"class":1052,"line":1616},51,[1050,1618,1154],{"class":1071},[1050,1620,1622],{"class":1052,"line":1621},52,[1050,1623,1106],{"class":1105},[1050,1625,1627,1630,1634,1636,1640,1642,1646,1648,1651],{"class":1052,"line":1626},53,[1050,1628,1629],{"class":1063},"    def",[1050,1631,1633],{"class":1632},"sJdAF"," __init__",[1050,1635,1072],{"class":1071},[1050,1637,1639],{"class":1638},"sRjD_","self",[1050,1641,1137],{"class":1071},[1050,1643,1645],{"class":1644},"sCyAa"," name",[1050,1647,1137],{"class":1071},[1050,1649,1650],{"class":1644}," app_label",[1050,1652,1085],{"class":1071},[1050,1654,1656,1660,1663,1666,1668,1671,1673,1675],{"class":1052,"line":1655},54,[1050,1657,1659],{"class":1658},"sa2tF","        super",[1050,1661,1662],{"class":1071},"().",[1050,1664,1665],{"class":1632},"__init__",[1050,1667,1072],{"class":1071},[1050,1669,1670],{"class":1203},"name",[1050,1672,1137],{"class":1071},[1050,1674,1650],{"class":1203},[1050,1676,1677],{"class":1071},")\n",[1050,1679,1681],{"class":1052,"line":1680},55,[1050,1682,1683],{"class":1105},"        \n",[1050,1685,1687],{"class":1052,"line":1686},56,[1050,1688,1689],{"class":1056},"        # Set atomicity based on database backend\n",[1050,1691,1693,1697,1700,1702,1705,1708],{"class":1052,"line":1692},57,[1050,1694,1696],{"class":1695},"siDh9","        from",[1050,1698,1699],{"class":1105}," django",[1050,1701,1079],{"class":1071},[1050,1703,1704],{"class":1105},"db ",[1050,1706,1707],{"class":1695},"import",[1050,1709,1710],{"class":1105}," connection\n",[1050,1712,1714],{"class":1052,"line":1713},58,[1050,1715,1683],{"class":1105},[1050,1717,1719,1722,1725,1727,1731,1735,1737,1740,1742],{"class":1052,"line":1718},59,[1050,1720,1721],{"class":1695},"        if",[1050,1723,1724],{"class":1105}," connection",[1050,1726,1079],{"class":1071},[1050,1728,1730],{"class":1729},"sBPpx","vendor",[1050,1732,1734],{"class":1733},"sVsLi"," ==",[1050,1736,1140],{"class":1127},[1050,1738,1739],{"class":1131},"postgresql",[1050,1741,1128],{"class":1127},[1050,1743,1744],{"class":1071},":\n",[1050,1746,1748],{"class":1052,"line":1747},60,[1050,1749,1750],{"class":1056},"            # PostgreSQL supports most operations in transactions\n",[1050,1752,1754,1758,1760,1763,1766],{"class":1052,"line":1753},61,[1050,1755,1757],{"class":1756},"se3Ec","            self",[1050,1759,1079],{"class":1071},[1050,1761,1762],{"class":1729},"atomic",[1050,1764,1765],{"class":1071}," =",[1050,1767,1177],{"class":1176},[1050,1769,1771,1774,1776,1778,1780,1782,1784,1787,1789],{"class":1052,"line":1770},62,[1050,1772,1773],{"class":1695},"        elif",[1050,1775,1724],{"class":1105},[1050,1777,1079],{"class":1071},[1050,1779,1730],{"class":1729},[1050,1781,1734],{"class":1733},[1050,1783,1140],{"class":1127},[1050,1785,1786],{"class":1131},"mysql",[1050,1788,1128],{"class":1127},[1050,1790,1744],{"class":1071},[1050,1792,1794],{"class":1052,"line":1793},63,[1050,1795,1796],{"class":1056},"            # MySQL has limitations with DDL in transactions\n",[1050,1798,1800,1802,1804,1806,1808],{"class":1052,"line":1799},64,[1050,1801,1757],{"class":1756},[1050,1803,1079],{"class":1071},[1050,1805,1762],{"class":1729},[1050,1807,1765],{"class":1071},[1050,1809,1461],{"class":1176},[1050,1811,1813,1816],{"class":1052,"line":1812},65,[1050,1814,1815],{"class":1695},"        else",[1050,1817,1744],{"class":1071},[1050,1819,1821],{"class":1052,"line":1820},66,[1050,1822,1823],{"class":1056},"            # Default behavior for other databases\n",[1050,1825,1827,1829,1831,1833,1835],{"class":1052,"line":1826},67,[1050,1828,1757],{"class":1756},[1050,1830,1079],{"class":1071},[1050,1832,1762],{"class":1729},[1050,1834,1765],{"class":1071},[1050,1836,1177],{"class":1176},[1050,1838,1840],{"class":1052,"line":1839},68,[1050,1841,1106],{"class":1105},[1050,1843,1845,1847,1849],{"class":1052,"line":1844},69,[1050,1846,1188],{"class":1105},[1050,1848,1115],{"class":1071},[1050,1850,1118],{"class":1071},[1050,1852,1854,1856,1858,1861],{"class":1052,"line":1853},70,[1050,1855,1198],{"class":1105},[1050,1857,1079],{"class":1071},[1050,1859,1860],{"class":1203},"AddIndex",[1050,1862,1207],{"class":1071},[1050,1864,1866,1868,1870,1872,1874,1876],{"class":1052,"line":1865},71,[1050,1867,1214],{"class":1213},[1050,1869,1115],{"class":1071},[1050,1871,1128],{"class":1127},[1050,1873,1221],{"class":1131},[1050,1875,1128],{"class":1127},[1050,1877,1226],{"class":1071},[1050,1879,1881,1884,1886,1888,1890,1893,1895,1898,1901,1903,1906,1908,1911,1913,1915,1917,1920,1922],{"class":1052,"line":1880},72,[1050,1882,1883],{"class":1213},"            index",[1050,1885,1115],{"class":1071},[1050,1887,1254],{"class":1203},[1050,1889,1079],{"class":1071},[1050,1891,1892],{"class":1203},"Index",[1050,1894,1072],{"class":1071},[1050,1896,1897],{"class":1213},"fields",[1050,1899,1900],{"class":1071},"=[",[1050,1902,1128],{"class":1127},[1050,1904,1905],{"class":1131},"created_at",[1050,1907,1128],{"class":1127},[1050,1909,1910],{"class":1071},"],",[1050,1912,1645],{"class":1213},[1050,1914,1115],{"class":1071},[1050,1916,1128],{"class":1127},[1050,1918,1919],{"class":1131},"idx_post_created",[1050,1921,1128],{"class":1127},[1050,1923,1148],{"class":1071},[1050,1925,1927],{"class":1052,"line":1926},73,[1050,1928,1278],{"class":1071},[1050,1930,1932],{"class":1052,"line":1931},74,[1050,1933,1154],{"class":1071},[1035,1935,1937],{"id":1936},"transaction-control-patterns","Transaction Control Patterns",[1040,1939,1941],{"className":1042,"code":1940,"language":1044,"meta":1045,"style":1045},"# Manual transaction control within migrations\nfrom django.db import transaction\n\nclass TransactionControlledMigration(migrations.Migration):\n    \"\"\"Migration with manual transaction control\"\"\"\n    \n    dependencies = [\n        ('blog', '0004_database_specific'),\n    ]\n    \n    # Disable automatic transaction wrapping\n    atomic = False\n    \n    operations = [\n        migrations.RunPython(\n            code=migrate_data_with_transaction_control,\n            reverse_code=migrations.RunPython.noop,\n        ),\n    ]\n\ndef migrate_data_with_transaction_control(apps, schema_editor):\n    \"\"\"Migrate data with custom transaction handling\"\"\"\n    \n    Post = apps.get_model('blog', 'Post')\n    \n    # Process data in smaller transactions\n    batch_size = 1000\n    total_posts = Post.objects.count()\n    processed = 0\n    \n    while processed \u003C total_posts:\n        with transaction.atomic():\n            # Process batch within transaction\n            posts = Post.objects.all()[processed:processed + batch_size]\n            \n            for post in posts:\n                # Perform data transformation\n                if not post.slug:\n                    post.slug = slugify(post.title)\n                    post.save()\n            \n            processed += batch_size\n            print(f\"Processed {processed}/{total_posts} posts\")\n\n# Savepoint usage in migrations\ndef migrate_with_savepoints(apps, schema_editor):\n    \"\"\"Use savepoints for partial rollback capability\"\"\"\n    \n    Post = apps.get_model('blog', 'Post')\n    Category = apps.get_model('blog', 'Category')\n    \n    with transaction.atomic():\n        # Create savepoint before risky operation\n        savepoint = transaction.savepoint()\n        \n        try:\n            # Risky data transformation\n            for post in Post.objects.all():\n                # Complex logic that might fail\n                if post.category_name:\n                    category, created = Category.objects.get_or_create(\n                        name=post.category_name\n                    )\n                    post.category = category\n                    post.save()\n            \n            # Commit savepoint if successful\n            transaction.savepoint_commit(savepoint)\n            \n        except Exception as e:\n            # Rollback to savepoint on error\n            transaction.savepoint_rollback(savepoint)\n            print(f\"Error during migration: {e}\")\n            raise\n\n# Conditional transaction handling\nclass ConditionalTransactionMigration(migrations.Migration):\n    \"\"\"Migration with conditional transaction behavior\"\"\"\n    \n    dependencies = [\n        ('blog', '0005_transaction_controlled'),\n    ]\n    \n    def __init__(self, name, app_label):\n        super().__init__(name, app_label)\n        \n        # Determine atomicity based on data size\n        from django.db import connection\n        \n        with connection.cursor() as cursor:\n            cursor.execute(\"SELECT COUNT(*) FROM blog_post\")\n            post_count = cursor.fetchone()[0]\n            \n            # Use non-atomic for large datasets\n            self.atomic = post_count \u003C 100000\n    \n    operations = [\n        migrations.RunPython(\n            code=conditional_data_migration,\n            reverse_code=migrations.RunPython.noop,\n        ),\n    ]\n\ndef conditional_data_migration(apps, schema_editor):\n    \"\"\"Data migration that adapts to dataset size\"\"\"\n    \n    Post = apps.get_model('blog', 'Post')\n    total_posts = Post.objects.count()\n    \n    if total_posts \u003C 10000:\n        # Small dataset: process all at once\n        with transaction.atomic():\n            for post in Post.objects.all():\n                post.updated_at = post.created_at\n                post.save()\n    \n    else:\n        # Large dataset: process in batches\n        batch_size = 5000\n        processed = 0\n        \n        while processed \u003C total_posts:\n            with transaction.atomic():\n                posts = Post.objects.all()[processed:processed + batch_size]\n                \n                Post.objects.filter(\n                    id__in=[p.id for p in posts]\n                ).update(updated_at=F('created_at'))\n                \n                processed += batch_size\n                print(f\"Updated {processed}/{total_posts} posts\")\n",[1047,1942,1943,1948,1964,1968,1985,1994,1998,2006,2027,2031,2035,2040,2048,2052,2060,2071,2083,2103,2107,2111,2115,2136,2145,2149,2183,2187,2192,2202,2225,2235,2239,2255,2270,2275,2314,2319,2335,2340,2358,2383,2394,2398,2409,2446,2450,2455,2472,2481,2485,2515,2547,2551,2564,2569,2585,2589,2596,2601,2621,2626,2639,2665,2679,2684,2698,2708,2712,2717,2733,2737,2753,2758,2773,2795,2800,2805,2811,2829,2839,2844,2853,2875,2880,2885,2906,2925,2930,2936,2951,2956,2978,3000,3021,3026,3032,3051,3056,3065,3076,3088,3107,3112,3117,3122,3140,3150,3155,3186,3205,3210,3226,3232,3245,3266,3286,3297,3302,3310,3316,3327,3337,3342,3356,3370,3402,3408,3425,3452,3481,3486,3496],{"__ignoreMap":1045},[1050,1944,1945],{"class":1052,"line":1053},[1050,1946,1947],{"class":1056},"# Manual transaction control within migrations\n",[1050,1949,1950,1953,1955,1957,1959,1961],{"class":1052,"line":1060},[1050,1951,1952],{"class":1695},"from",[1050,1954,1699],{"class":1105},[1050,1956,1079],{"class":1071},[1050,1958,1704],{"class":1105},[1050,1960,1707],{"class":1695},[1050,1962,1963],{"class":1105}," transaction\n",[1050,1965,1966],{"class":1052,"line":1088},[1050,1967,1366],{"emptyLinePlaceholder":1365},[1050,1969,1970,1972,1975,1977,1979,1981,1983],{"class":1052,"line":1102},[1050,1971,1064],{"class":1063},[1050,1973,1974],{"class":1067}," TransactionControlledMigration",[1050,1976,1072],{"class":1071},[1050,1978,1076],{"class":1075},[1050,1980,1079],{"class":1071},[1050,1982,1082],{"class":1075},[1050,1984,1085],{"class":1071},[1050,1986,1987,1989,1992],{"class":1052,"line":1109},[1050,1988,1092],{"class":1091},[1050,1990,1991],{"class":1095},"Migration with manual transaction control",[1050,1993,1099],{"class":1091},[1050,1995,1996],{"class":1052,"line":1121},[1050,1997,1106],{"class":1105},[1050,1999,2000,2002,2004],{"class":1052,"line":1151},[1050,2001,1112],{"class":1105},[1050,2003,1115],{"class":1071},[1050,2005,1118],{"class":1071},[1050,2007,2008,2010,2012,2014,2016,2018,2020,2023,2025],{"class":1052,"line":1157},[1050,2009,1124],{"class":1071},[1050,2011,1128],{"class":1127},[1050,2013,1132],{"class":1131},[1050,2015,1128],{"class":1127},[1050,2017,1137],{"class":1071},[1050,2019,1140],{"class":1127},[1050,2021,2022],{"class":1131},"0004_database_specific",[1050,2024,1128],{"class":1127},[1050,2026,1148],{"class":1071},[1050,2028,2029],{"class":1052,"line":1162},[1050,2030,1154],{"class":1071},[1050,2032,2033],{"class":1052,"line":1168},[1050,2034,1106],{"class":1105},[1050,2036,2037],{"class":1052,"line":1180},[1050,2038,2039],{"class":1056},"    # Disable automatic transaction wrapping\n",[1050,2041,2042,2044,2046],{"class":1052,"line":1185},[1050,2043,1171],{"class":1105},[1050,2045,1115],{"class":1071},[1050,2047,1461],{"class":1176},[1050,2049,2050],{"class":1052,"line":1195},[1050,2051,1106],{"class":1105},[1050,2053,2054,2056,2058],{"class":1052,"line":1210},[1050,2055,1188],{"class":1105},[1050,2057,1115],{"class":1071},[1050,2059,1118],{"class":1071},[1050,2061,2062,2064,2066,2069],{"class":1052,"line":1229},[1050,2063,1198],{"class":1105},[1050,2065,1079],{"class":1071},[1050,2067,2068],{"class":1203},"RunPython",[1050,2070,1207],{"class":1071},[1050,2072,2073,2076,2078,2081],{"class":1052,"line":1246},[1050,2074,2075],{"class":1213},"            code",[1050,2077,1115],{"class":1071},[1050,2079,2080],{"class":1203},"migrate_data_with_transaction_control",[1050,2082,1226],{"class":1071},[1050,2084,2085,2088,2090,2092,2094,2096,2098,2101],{"class":1052,"line":1275},[1050,2086,2087],{"class":1213},"            reverse_code",[1050,2089,1115],{"class":1071},[1050,2091,1076],{"class":1203},[1050,2093,1079],{"class":1071},[1050,2095,2068],{"class":1729},[1050,2097,1079],{"class":1071},[1050,2099,2100],{"class":1729},"noop",[1050,2102,1226],{"class":1071},[1050,2104,2105],{"class":1052,"line":1281},[1050,2106,1278],{"class":1071},[1050,2108,2109],{"class":1052,"line":1292},[1050,2110,1154],{"class":1071},[1050,2112,2113],{"class":1052,"line":1307},[1050,2114,1366],{"emptyLinePlaceholder":1365},[1050,2116,2117,2120,2124,2126,2129,2131,2134],{"class":1052,"line":1323},[1050,2118,2119],{"class":1063},"def",[1050,2121,2123],{"class":2122},"sljsM"," migrate_data_with_transaction_control",[1050,2125,1072],{"class":1071},[1050,2127,2128],{"class":1644},"apps",[1050,2130,1137],{"class":1071},[1050,2132,2133],{"class":1644}," schema_editor",[1050,2135,1085],{"class":1071},[1050,2137,2138,2140,2143],{"class":1052,"line":1346},[1050,2139,1092],{"class":1091},[1050,2141,2142],{"class":1095},"Migrate data with custom transaction handling",[1050,2144,1099],{"class":1091},[1050,2146,2147],{"class":1052,"line":1351},[1050,2148,1106],{"class":1105},[1050,2150,2151,2154,2156,2159,2161,2164,2166,2168,2170,2172,2174,2176,2179,2181],{"class":1052,"line":1357},[1050,2152,2153],{"class":1105},"    Post ",[1050,2155,1115],{"class":1071},[1050,2157,2158],{"class":1105}," apps",[1050,2160,1079],{"class":1071},[1050,2162,2163],{"class":1203},"get_model",[1050,2165,1072],{"class":1071},[1050,2167,1128],{"class":1127},[1050,2169,1132],{"class":1131},[1050,2171,1128],{"class":1127},[1050,2173,1137],{"class":1071},[1050,2175,1140],{"class":1127},[1050,2177,2178],{"class":1131},"Post",[1050,2180,1128],{"class":1127},[1050,2182,1677],{"class":1071},[1050,2184,2185],{"class":1052,"line":1362},[1050,2186,1106],{"class":1105},[1050,2188,2189],{"class":1052,"line":1369},[1050,2190,2191],{"class":1056},"    # Process data in smaller transactions\n",[1050,2193,2194,2197,2199],{"class":1052,"line":1375},[1050,2195,2196],{"class":1105},"    batch_size ",[1050,2198,1115],{"class":1071},[1050,2200,2201],{"class":1269}," 1000\n",[1050,2203,2204,2207,2209,2212,2214,2217,2219,2222],{"class":1052,"line":1392},[1050,2205,2206],{"class":1105},"    total_posts ",[1050,2208,1115],{"class":1071},[1050,2210,2211],{"class":1105}," Post",[1050,2213,1079],{"class":1071},[1050,2215,2216],{"class":1729},"objects",[1050,2218,1079],{"class":1071},[1050,2220,2221],{"class":1203},"count",[1050,2223,2224],{"class":1071},"()\n",[1050,2226,2227,2230,2232],{"class":1052,"line":1402},[1050,2228,2229],{"class":1105},"    processed ",[1050,2231,1115],{"class":1071},[1050,2233,2234],{"class":1269}," 0\n",[1050,2236,2237],{"class":1052,"line":1407},[1050,2238,1106],{"class":1105},[1050,2240,2241,2244,2247,2250,2253],{"class":1052,"line":1416},[1050,2242,2243],{"class":1695},"    while",[1050,2245,2246],{"class":1105}," processed ",[1050,2248,2249],{"class":1733},"\u003C",[1050,2251,2252],{"class":1105}," total_posts",[1050,2254,1744],{"class":1071},[1050,2256,2257,2260,2263,2265,2267],{"class":1052,"line":1438},[1050,2258,2259],{"class":1695},"        with",[1050,2261,2262],{"class":1105}," transaction",[1050,2264,1079],{"class":1071},[1050,2266,1762],{"class":1203},[1050,2268,2269],{"class":1071},"():\n",[1050,2271,2272],{"class":1052,"line":1443},[1050,2273,2274],{"class":1056},"            # Process batch within transaction\n",[1050,2276,2277,2280,2282,2284,2286,2288,2290,2293,2296,2299,2302,2305,2308,2311],{"class":1052,"line":1448},[1050,2278,2279],{"class":1105},"            posts ",[1050,2281,1115],{"class":1071},[1050,2283,2211],{"class":1105},[1050,2285,1079],{"class":1071},[1050,2287,2216],{"class":1729},[1050,2289,1079],{"class":1071},[1050,2291,2292],{"class":1203},"all",[1050,2294,2295],{"class":1071},"()[",[1050,2297,2298],{"class":1105},"processed",[1050,2300,2301],{"class":1071},":",[1050,2303,2304],{"class":1105},"processed ",[1050,2306,2307],{"class":1733},"+",[1050,2309,2310],{"class":1105}," batch_size",[1050,2312,2313],{"class":1071},"]\n",[1050,2315,2316],{"class":1052,"line":1454},[1050,2317,2318],{"class":1105},"            \n",[1050,2320,2321,2324,2327,2330,2333],{"class":1052,"line":1464},[1050,2322,2323],{"class":1695},"            for",[1050,2325,2326],{"class":1105}," post ",[1050,2328,2329],{"class":1695},"in",[1050,2331,2332],{"class":1105}," posts",[1050,2334,1744],{"class":1071},[1050,2336,2337],{"class":1052,"line":1469},[1050,2338,2339],{"class":1056},"                # Perform data transformation\n",[1050,2341,2342,2345,2348,2351,2353,2356],{"class":1052,"line":1478},[1050,2343,2344],{"class":1695},"                if",[1050,2346,2347],{"class":1733}," not",[1050,2349,2350],{"class":1105}," post",[1050,2352,1079],{"class":1071},[1050,2354,2355],{"class":1729},"slug",[1050,2357,1744],{"class":1071},[1050,2359,2360,2363,2365,2367,2369,2372,2374,2376,2378,2381],{"class":1052,"line":1484},[1050,2361,2362],{"class":1105},"                    post",[1050,2364,1079],{"class":1071},[1050,2366,2355],{"class":1729},[1050,2368,1765],{"class":1071},[1050,2370,2371],{"class":1203}," slugify",[1050,2373,1072],{"class":1071},[1050,2375,1221],{"class":1203},[1050,2377,1079],{"class":1071},[1050,2379,2380],{"class":1729},"title",[1050,2382,1677],{"class":1071},[1050,2384,2385,2387,2389,2392],{"class":1052,"line":1496},[1050,2386,2362],{"class":1105},[1050,2388,1079],{"class":1071},[1050,2390,2391],{"class":1203},"save",[1050,2393,2224],{"class":1071},[1050,2395,2396],{"class":1052,"line":1514},[1050,2397,2318],{"class":1105},[1050,2399,2400,2403,2406],{"class":1052,"line":1531},[1050,2401,2402],{"class":1105},"            processed ",[1050,2404,2405],{"class":1071},"+=",[1050,2407,2408],{"class":1105}," batch_size\n",[1050,2410,2411,2414,2416,2419,2422,2426,2428,2431,2434,2436,2439,2441,2444],{"class":1052,"line":1536},[1050,2412,2413],{"class":1632},"            print",[1050,2415,1072],{"class":1071},[1050,2417,2418],{"class":1063},"f",[1050,2420,2421],{"class":1131},"\"Processed ",[1050,2423,2425],{"class":2424},"s3h35","{",[1050,2427,2298],{"class":1203},[1050,2429,2430],{"class":2424},"}",[1050,2432,2433],{"class":1131},"/",[1050,2435,2425],{"class":2424},[1050,2437,2438],{"class":1203},"total_posts",[1050,2440,2430],{"class":2424},[1050,2442,2443],{"class":1131}," posts\"",[1050,2445,1677],{"class":1071},[1050,2447,2448],{"class":1052,"line":1541},[1050,2449,1366],{"emptyLinePlaceholder":1365},[1050,2451,2452],{"class":1052,"line":1546},[1050,2453,2454],{"class":1056},"# Savepoint usage in migrations\n",[1050,2456,2457,2459,2462,2464,2466,2468,2470],{"class":1052,"line":1552},[1050,2458,2119],{"class":1063},[1050,2460,2461],{"class":2122}," migrate_with_savepoints",[1050,2463,1072],{"class":1071},[1050,2465,2128],{"class":1644},[1050,2467,1137],{"class":1071},[1050,2469,2133],{"class":1644},[1050,2471,1085],{"class":1071},[1050,2473,2474,2476,2479],{"class":1052,"line":1570},[1050,2475,1092],{"class":1091},[1050,2477,2478],{"class":1095},"Use savepoints for partial rollback capability",[1050,2480,1099],{"class":1091},[1050,2482,2483],{"class":1052,"line":1580},[1050,2484,1106],{"class":1105},[1050,2486,2487,2489,2491,2493,2495,2497,2499,2501,2503,2505,2507,2509,2511,2513],{"class":1052,"line":1585},[1050,2488,2153],{"class":1105},[1050,2490,1115],{"class":1071},[1050,2492,2158],{"class":1105},[1050,2494,1079],{"class":1071},[1050,2496,2163],{"class":1203},[1050,2498,1072],{"class":1071},[1050,2500,1128],{"class":1127},[1050,2502,1132],{"class":1131},[1050,2504,1128],{"class":1127},[1050,2506,1137],{"class":1071},[1050,2508,1140],{"class":1127},[1050,2510,2178],{"class":1131},[1050,2512,1128],{"class":1127},[1050,2514,1677],{"class":1071},[1050,2516,2517,2520,2522,2524,2526,2528,2530,2532,2534,2536,2538,2540,2543,2545],{"class":1052,"line":1594},[1050,2518,2519],{"class":1105},"    Category ",[1050,2521,1115],{"class":1071},[1050,2523,2158],{"class":1105},[1050,2525,1079],{"class":1071},[1050,2527,2163],{"class":1203},[1050,2529,1072],{"class":1071},[1050,2531,1128],{"class":1127},[1050,2533,1132],{"class":1131},[1050,2535,1128],{"class":1127},[1050,2537,1137],{"class":1071},[1050,2539,1140],{"class":1127},[1050,2541,2542],{"class":1131},"Category",[1050,2544,1128],{"class":1127},[1050,2546,1677],{"class":1071},[1050,2548,2549],{"class":1052,"line":1616},[1050,2550,1106],{"class":1105},[1050,2552,2553,2556,2558,2560,2562],{"class":1052,"line":1621},[1050,2554,2555],{"class":1695},"    with",[1050,2557,2262],{"class":1105},[1050,2559,1079],{"class":1071},[1050,2561,1762],{"class":1203},[1050,2563,2269],{"class":1071},[1050,2565,2566],{"class":1052,"line":1626},[1050,2567,2568],{"class":1056},"        # Create savepoint before risky operation\n",[1050,2570,2571,2574,2576,2578,2580,2583],{"class":1052,"line":1655},[1050,2572,2573],{"class":1105},"        savepoint ",[1050,2575,1115],{"class":1071},[1050,2577,2262],{"class":1105},[1050,2579,1079],{"class":1071},[1050,2581,2582],{"class":1203},"savepoint",[1050,2584,2224],{"class":1071},[1050,2586,2587],{"class":1052,"line":1680},[1050,2588,1683],{"class":1105},[1050,2590,2591,2594],{"class":1052,"line":1686},[1050,2592,2593],{"class":1695},"        try",[1050,2595,1744],{"class":1071},[1050,2597,2598],{"class":1052,"line":1692},[1050,2599,2600],{"class":1056},"            # Risky data transformation\n",[1050,2602,2603,2605,2607,2609,2611,2613,2615,2617,2619],{"class":1052,"line":1713},[1050,2604,2323],{"class":1695},[1050,2606,2326],{"class":1105},[1050,2608,2329],{"class":1695},[1050,2610,2211],{"class":1105},[1050,2612,1079],{"class":1071},[1050,2614,2216],{"class":1729},[1050,2616,1079],{"class":1071},[1050,2618,2292],{"class":1203},[1050,2620,2269],{"class":1071},[1050,2622,2623],{"class":1052,"line":1718},[1050,2624,2625],{"class":1056},"                # Complex logic that might fail\n",[1050,2627,2628,2630,2632,2634,2637],{"class":1052,"line":1747},[1050,2629,2344],{"class":1695},[1050,2631,2350],{"class":1105},[1050,2633,1079],{"class":1071},[1050,2635,2636],{"class":1729},"category_name",[1050,2638,1744],{"class":1071},[1050,2640,2641,2644,2646,2649,2651,2654,2656,2658,2660,2663],{"class":1052,"line":1753},[1050,2642,2643],{"class":1105},"                    category",[1050,2645,1137],{"class":1071},[1050,2647,2648],{"class":1105}," created ",[1050,2650,1115],{"class":1071},[1050,2652,2653],{"class":1105}," Category",[1050,2655,1079],{"class":1071},[1050,2657,2216],{"class":1729},[1050,2659,1079],{"class":1071},[1050,2661,2662],{"class":1203},"get_or_create",[1050,2664,1207],{"class":1071},[1050,2666,2667,2670,2672,2674,2676],{"class":1052,"line":1770},[1050,2668,2669],{"class":1213},"                        name",[1050,2671,1115],{"class":1071},[1050,2673,1221],{"class":1203},[1050,2675,1079],{"class":1071},[1050,2677,2678],{"class":1729},"category_name\n",[1050,2680,2681],{"class":1052,"line":1793},[1050,2682,2683],{"class":1071},"                    )\n",[1050,2685,2686,2688,2690,2693,2695],{"class":1052,"line":1799},[1050,2687,2362],{"class":1105},[1050,2689,1079],{"class":1071},[1050,2691,2692],{"class":1729},"category",[1050,2694,1765],{"class":1071},[1050,2696,2697],{"class":1105}," category\n",[1050,2699,2700,2702,2704,2706],{"class":1052,"line":1812},[1050,2701,2362],{"class":1105},[1050,2703,1079],{"class":1071},[1050,2705,2391],{"class":1203},[1050,2707,2224],{"class":1071},[1050,2709,2710],{"class":1052,"line":1820},[1050,2711,2318],{"class":1105},[1050,2713,2714],{"class":1052,"line":1826},[1050,2715,2716],{"class":1056},"            # Commit savepoint if successful\n",[1050,2718,2719,2722,2724,2727,2729,2731],{"class":1052,"line":1839},[1050,2720,2721],{"class":1105},"            transaction",[1050,2723,1079],{"class":1071},[1050,2725,2726],{"class":1203},"savepoint_commit",[1050,2728,1072],{"class":1071},[1050,2730,2582],{"class":1203},[1050,2732,1677],{"class":1071},[1050,2734,2735],{"class":1052,"line":1844},[1050,2736,2318],{"class":1105},[1050,2738,2739,2742,2745,2748,2751],{"class":1052,"line":1853},[1050,2740,2741],{"class":1695},"        except",[1050,2743,2744],{"class":1658}," Exception",[1050,2746,2747],{"class":1695}," as",[1050,2749,2750],{"class":1105}," e",[1050,2752,1744],{"class":1071},[1050,2754,2755],{"class":1052,"line":1865},[1050,2756,2757],{"class":1056},"            # Rollback to savepoint on error\n",[1050,2759,2760,2762,2764,2767,2769,2771],{"class":1052,"line":1880},[1050,2761,2721],{"class":1105},[1050,2763,1079],{"class":1071},[1050,2765,2766],{"class":1203},"savepoint_rollback",[1050,2768,1072],{"class":1071},[1050,2770,2582],{"class":1203},[1050,2772,1677],{"class":1071},[1050,2774,2775,2777,2779,2781,2784,2786,2789,2791,2793],{"class":1052,"line":1926},[1050,2776,2413],{"class":1632},[1050,2778,1072],{"class":1071},[1050,2780,2418],{"class":1063},[1050,2782,2783],{"class":1131},"\"Error during migration: ",[1050,2785,2425],{"class":2424},[1050,2787,2788],{"class":1203},"e",[1050,2790,2430],{"class":2424},[1050,2792,1504],{"class":1131},[1050,2794,1677],{"class":1071},[1050,2796,2797],{"class":1052,"line":1931},[1050,2798,2799],{"class":1695},"            raise\n",[1050,2801,2803],{"class":1052,"line":2802},75,[1050,2804,1366],{"emptyLinePlaceholder":1365},[1050,2806,2808],{"class":1052,"line":2807},76,[1050,2809,2810],{"class":1056},"# Conditional transaction handling\n",[1050,2812,2814,2816,2819,2821,2823,2825,2827],{"class":1052,"line":2813},77,[1050,2815,1064],{"class":1063},[1050,2817,2818],{"class":1067}," ConditionalTransactionMigration",[1050,2820,1072],{"class":1071},[1050,2822,1076],{"class":1075},[1050,2824,1079],{"class":1071},[1050,2826,1082],{"class":1075},[1050,2828,1085],{"class":1071},[1050,2830,2832,2834,2837],{"class":1052,"line":2831},78,[1050,2833,1092],{"class":1091},[1050,2835,2836],{"class":1095},"Migration with conditional transaction behavior",[1050,2838,1099],{"class":1091},[1050,2840,2842],{"class":1052,"line":2841},79,[1050,2843,1106],{"class":1105},[1050,2845,2847,2849,2851],{"class":1052,"line":2846},80,[1050,2848,1112],{"class":1105},[1050,2850,1115],{"class":1071},[1050,2852,1118],{"class":1071},[1050,2854,2856,2858,2860,2862,2864,2866,2868,2871,2873],{"class":1052,"line":2855},81,[1050,2857,1124],{"class":1071},[1050,2859,1128],{"class":1127},[1050,2861,1132],{"class":1131},[1050,2863,1128],{"class":1127},[1050,2865,1137],{"class":1071},[1050,2867,1140],{"class":1127},[1050,2869,2870],{"class":1131},"0005_transaction_controlled",[1050,2872,1128],{"class":1127},[1050,2874,1148],{"class":1071},[1050,2876,2878],{"class":1052,"line":2877},82,[1050,2879,1154],{"class":1071},[1050,2881,2883],{"class":1052,"line":2882},83,[1050,2884,1106],{"class":1105},[1050,2886,2888,2890,2892,2894,2896,2898,2900,2902,2904],{"class":1052,"line":2887},84,[1050,2889,1629],{"class":1063},[1050,2891,1633],{"class":1632},[1050,2893,1072],{"class":1071},[1050,2895,1639],{"class":1638},[1050,2897,1137],{"class":1071},[1050,2899,1645],{"class":1644},[1050,2901,1137],{"class":1071},[1050,2903,1650],{"class":1644},[1050,2905,1085],{"class":1071},[1050,2907,2909,2911,2913,2915,2917,2919,2921,2923],{"class":1052,"line":2908},85,[1050,2910,1659],{"class":1658},[1050,2912,1662],{"class":1071},[1050,2914,1665],{"class":1632},[1050,2916,1072],{"class":1071},[1050,2918,1670],{"class":1203},[1050,2920,1137],{"class":1071},[1050,2922,1650],{"class":1203},[1050,2924,1677],{"class":1071},[1050,2926,2928],{"class":1052,"line":2927},86,[1050,2929,1683],{"class":1105},[1050,2931,2933],{"class":1052,"line":2932},87,[1050,2934,2935],{"class":1056},"        # Determine atomicity based on data size\n",[1050,2937,2939,2941,2943,2945,2947,2949],{"class":1052,"line":2938},88,[1050,2940,1696],{"class":1695},[1050,2942,1699],{"class":1105},[1050,2944,1079],{"class":1071},[1050,2946,1704],{"class":1105},[1050,2948,1707],{"class":1695},[1050,2950,1710],{"class":1105},[1050,2952,2954],{"class":1052,"line":2953},89,[1050,2955,1683],{"class":1105},[1050,2957,2959,2961,2963,2965,2968,2971,2973,2976],{"class":1052,"line":2958},90,[1050,2960,2259],{"class":1695},[1050,2962,1724],{"class":1105},[1050,2964,1079],{"class":1071},[1050,2966,2967],{"class":1203},"cursor",[1050,2969,2970],{"class":1071},"()",[1050,2972,2747],{"class":1695},[1050,2974,2975],{"class":1105}," cursor",[1050,2977,1744],{"class":1071},[1050,2979,2981,2984,2986,2989,2991,2993,2996,2998],{"class":1052,"line":2980},91,[1050,2982,2983],{"class":1105},"            cursor",[1050,2985,1079],{"class":1071},[1050,2987,2988],{"class":1203},"execute",[1050,2990,1072],{"class":1071},[1050,2992,1504],{"class":1127},[1050,2994,2995],{"class":1131},"SELECT COUNT(*) FROM blog_post",[1050,2997,1504],{"class":1127},[1050,2999,1677],{"class":1071},[1050,3001,3003,3006,3008,3010,3012,3015,3017,3019],{"class":1052,"line":3002},92,[1050,3004,3005],{"class":1105},"            post_count ",[1050,3007,1115],{"class":1071},[1050,3009,2975],{"class":1105},[1050,3011,1079],{"class":1071},[1050,3013,3014],{"class":1203},"fetchone",[1050,3016,2295],{"class":1071},[1050,3018,1270],{"class":1269},[1050,3020,2313],{"class":1071},[1050,3022,3024],{"class":1052,"line":3023},93,[1050,3025,2318],{"class":1105},[1050,3027,3029],{"class":1052,"line":3028},94,[1050,3030,3031],{"class":1056},"            # Use non-atomic for large datasets\n",[1050,3033,3035,3037,3039,3041,3043,3046,3048],{"class":1052,"line":3034},95,[1050,3036,1757],{"class":1756},[1050,3038,1079],{"class":1071},[1050,3040,1762],{"class":1729},[1050,3042,1765],{"class":1071},[1050,3044,3045],{"class":1105}," post_count ",[1050,3047,2249],{"class":1733},[1050,3049,3050],{"class":1269}," 100000\n",[1050,3052,3054],{"class":1052,"line":3053},96,[1050,3055,1106],{"class":1105},[1050,3057,3059,3061,3063],{"class":1052,"line":3058},97,[1050,3060,1188],{"class":1105},[1050,3062,1115],{"class":1071},[1050,3064,1118],{"class":1071},[1050,3066,3068,3070,3072,3074],{"class":1052,"line":3067},98,[1050,3069,1198],{"class":1105},[1050,3071,1079],{"class":1071},[1050,3073,2068],{"class":1203},[1050,3075,1207],{"class":1071},[1050,3077,3079,3081,3083,3086],{"class":1052,"line":3078},99,[1050,3080,2075],{"class":1213},[1050,3082,1115],{"class":1071},[1050,3084,3085],{"class":1203},"conditional_data_migration",[1050,3087,1226],{"class":1071},[1050,3089,3091,3093,3095,3097,3099,3101,3103,3105],{"class":1052,"line":3090},100,[1050,3092,2087],{"class":1213},[1050,3094,1115],{"class":1071},[1050,3096,1076],{"class":1203},[1050,3098,1079],{"class":1071},[1050,3100,2068],{"class":1729},[1050,3102,1079],{"class":1071},[1050,3104,2100],{"class":1729},[1050,3106,1226],{"class":1071},[1050,3108,3110],{"class":1052,"line":3109},101,[1050,3111,1278],{"class":1071},[1050,3113,3115],{"class":1052,"line":3114},102,[1050,3116,1154],{"class":1071},[1050,3118,3120],{"class":1052,"line":3119},103,[1050,3121,1366],{"emptyLinePlaceholder":1365},[1050,3123,3125,3127,3130,3132,3134,3136,3138],{"class":1052,"line":3124},104,[1050,3126,2119],{"class":1063},[1050,3128,3129],{"class":2122}," conditional_data_migration",[1050,3131,1072],{"class":1071},[1050,3133,2128],{"class":1644},[1050,3135,1137],{"class":1071},[1050,3137,2133],{"class":1644},[1050,3139,1085],{"class":1071},[1050,3141,3143,3145,3148],{"class":1052,"line":3142},105,[1050,3144,1092],{"class":1091},[1050,3146,3147],{"class":1095},"Data migration that adapts to dataset size",[1050,3149,1099],{"class":1091},[1050,3151,3153],{"class":1052,"line":3152},106,[1050,3154,1106],{"class":1105},[1050,3156,3158,3160,3162,3164,3166,3168,3170,3172,3174,3176,3178,3180,3182,3184],{"class":1052,"line":3157},107,[1050,3159,2153],{"class":1105},[1050,3161,1115],{"class":1071},[1050,3163,2158],{"class":1105},[1050,3165,1079],{"class":1071},[1050,3167,2163],{"class":1203},[1050,3169,1072],{"class":1071},[1050,3171,1128],{"class":1127},[1050,3173,1132],{"class":1131},[1050,3175,1128],{"class":1127},[1050,3177,1137],{"class":1071},[1050,3179,1140],{"class":1127},[1050,3181,2178],{"class":1131},[1050,3183,1128],{"class":1127},[1050,3185,1677],{"class":1071},[1050,3187,3189,3191,3193,3195,3197,3199,3201,3203],{"class":1052,"line":3188},108,[1050,3190,2206],{"class":1105},[1050,3192,1115],{"class":1071},[1050,3194,2211],{"class":1105},[1050,3196,1079],{"class":1071},[1050,3198,2216],{"class":1729},[1050,3200,1079],{"class":1071},[1050,3202,2221],{"class":1203},[1050,3204,2224],{"class":1071},[1050,3206,3208],{"class":1052,"line":3207},109,[1050,3209,1106],{"class":1105},[1050,3211,3213,3216,3219,3221,3224],{"class":1052,"line":3212},110,[1050,3214,3215],{"class":1695},"    if",[1050,3217,3218],{"class":1105}," total_posts ",[1050,3220,2249],{"class":1733},[1050,3222,3223],{"class":1269}," 10000",[1050,3225,1744],{"class":1071},[1050,3227,3229],{"class":1052,"line":3228},111,[1050,3230,3231],{"class":1056},"        # Small dataset: process all at once\n",[1050,3233,3235,3237,3239,3241,3243],{"class":1052,"line":3234},112,[1050,3236,2259],{"class":1695},[1050,3238,2262],{"class":1105},[1050,3240,1079],{"class":1071},[1050,3242,1762],{"class":1203},[1050,3244,2269],{"class":1071},[1050,3246,3248,3250,3252,3254,3256,3258,3260,3262,3264],{"class":1052,"line":3247},113,[1050,3249,2323],{"class":1695},[1050,3251,2326],{"class":1105},[1050,3253,2329],{"class":1695},[1050,3255,2211],{"class":1105},[1050,3257,1079],{"class":1071},[1050,3259,2216],{"class":1729},[1050,3261,1079],{"class":1071},[1050,3263,2292],{"class":1203},[1050,3265,2269],{"class":1071},[1050,3267,3269,3272,3274,3277,3279,3281,3283],{"class":1052,"line":3268},114,[1050,3270,3271],{"class":1105},"                post",[1050,3273,1079],{"class":1071},[1050,3275,3276],{"class":1729},"updated_at",[1050,3278,1765],{"class":1071},[1050,3280,2350],{"class":1105},[1050,3282,1079],{"class":1071},[1050,3284,3285],{"class":1729},"created_at\n",[1050,3287,3289,3291,3293,3295],{"class":1052,"line":3288},115,[1050,3290,3271],{"class":1105},[1050,3292,1079],{"class":1071},[1050,3294,2391],{"class":1203},[1050,3296,2224],{"class":1071},[1050,3298,3300],{"class":1052,"line":3299},116,[1050,3301,1106],{"class":1105},[1050,3303,3305,3308],{"class":1052,"line":3304},117,[1050,3306,3307],{"class":1695},"    else",[1050,3309,1744],{"class":1071},[1050,3311,3313],{"class":1052,"line":3312},118,[1050,3314,3315],{"class":1056},"        # Large dataset: process in batches\n",[1050,3317,3319,3322,3324],{"class":1052,"line":3318},119,[1050,3320,3321],{"class":1105},"        batch_size ",[1050,3323,1115],{"class":1071},[1050,3325,3326],{"class":1269}," 5000\n",[1050,3328,3330,3333,3335],{"class":1052,"line":3329},120,[1050,3331,3332],{"class":1105},"        processed ",[1050,3334,1115],{"class":1071},[1050,3336,2234],{"class":1269},[1050,3338,3340],{"class":1052,"line":3339},121,[1050,3341,1683],{"class":1105},[1050,3343,3345,3348,3350,3352,3354],{"class":1052,"line":3344},122,[1050,3346,3347],{"class":1695},"        while",[1050,3349,2246],{"class":1105},[1050,3351,2249],{"class":1733},[1050,3353,2252],{"class":1105},[1050,3355,1744],{"class":1071},[1050,3357,3359,3362,3364,3366,3368],{"class":1052,"line":3358},123,[1050,3360,3361],{"class":1695},"            with",[1050,3363,2262],{"class":1105},[1050,3365,1079],{"class":1071},[1050,3367,1762],{"class":1203},[1050,3369,2269],{"class":1071},[1050,3371,3373,3376,3378,3380,3382,3384,3386,3388,3390,3392,3394,3396,3398,3400],{"class":1052,"line":3372},124,[1050,3374,3375],{"class":1105},"                posts ",[1050,3377,1115],{"class":1071},[1050,3379,2211],{"class":1105},[1050,3381,1079],{"class":1071},[1050,3383,2216],{"class":1729},[1050,3385,1079],{"class":1071},[1050,3387,2292],{"class":1203},[1050,3389,2295],{"class":1071},[1050,3391,2298],{"class":1105},[1050,3393,2301],{"class":1071},[1050,3395,2304],{"class":1105},[1050,3397,2307],{"class":1733},[1050,3399,2310],{"class":1105},[1050,3401,2313],{"class":1071},[1050,3403,3405],{"class":1052,"line":3404},125,[1050,3406,3407],{"class":1105},"                \n",[1050,3409,3411,3414,3416,3418,3420,3423],{"class":1052,"line":3410},126,[1050,3412,3413],{"class":1105},"                Post",[1050,3415,1079],{"class":1071},[1050,3417,2216],{"class":1729},[1050,3419,1079],{"class":1071},[1050,3421,3422],{"class":1203},"filter",[1050,3424,1207],{"class":1071},[1050,3426,3428,3431,3433,3435,3437,3440,3443,3446,3448,3450],{"class":1052,"line":3427},127,[1050,3429,3430],{"class":1213},"                    id__in",[1050,3432,1900],{"class":1071},[1050,3434,1026],{"class":1203},[1050,3436,1079],{"class":1071},[1050,3438,3439],{"class":1729},"id",[1050,3441,3442],{"class":1695}," for",[1050,3444,3445],{"class":1203}," p ",[1050,3447,2329],{"class":1695},[1050,3449,2332],{"class":1203},[1050,3451,2313],{"class":1071},[1050,3453,3455,3458,3461,3463,3465,3467,3470,3472,3474,3476,3478],{"class":1052,"line":3454},128,[1050,3456,3457],{"class":1071},"                ).",[1050,3459,3460],{"class":1203},"update",[1050,3462,1072],{"class":1071},[1050,3464,3276],{"class":1213},[1050,3466,1115],{"class":1071},[1050,3468,3469],{"class":1203},"F",[1050,3471,1072],{"class":1071},[1050,3473,1128],{"class":1127},[1050,3475,1905],{"class":1131},[1050,3477,1128],{"class":1127},[1050,3479,3480],{"class":1071},"))\n",[1050,3482,3484],{"class":1052,"line":3483},129,[1050,3485,3407],{"class":1105},[1050,3487,3489,3492,3494],{"class":1052,"line":3488},130,[1050,3490,3491],{"class":1105},"                processed ",[1050,3493,2405],{"class":1071},[1050,3495,2408],{"class":1105},[1050,3497,3499,3502,3504,3506,3509,3511,3513,3515,3517,3519,3521,3523,3525],{"class":1052,"line":3498},131,[1050,3500,3501],{"class":1632},"                print",[1050,3503,1072],{"class":1071},[1050,3505,2418],{"class":1063},[1050,3507,3508],{"class":1131},"\"Updated ",[1050,3510,2425],{"class":2424},[1050,3512,2298],{"class":1203},[1050,3514,2430],{"class":2424},[1050,3516,2433],{"class":1131},[1050,3518,2425],{"class":2424},[1050,3520,2438],{"class":1203},[1050,3522,2430],{"class":2424},[1050,3524,2443],{"class":1131},[1050,3526,1677],{"class":1071},[1030,3528,3530],{"id":3529},"error-handling-and-recovery","Error Handling and Recovery",[1035,3532,3534],{"id":3533},"transaction-rollback-strategies","Transaction Rollback Strategies",[1040,3536,3538],{"className":1042,"code":3537,"language":1044,"meta":1045,"style":1045},"class RobustMigrationPatterns:\n    \"\"\"Patterns for robust migration error handling\"\"\"\n    \n    @staticmethod\n    def migration_with_retry_logic(apps, schema_editor):\n        \"\"\"Migration with automatic retry on transient failures\"\"\"\n        \n        import time\n        from django.db import transaction, OperationalError\n        \n        Post = apps.get_model('blog', 'Post')\n        \n        max_retries = 3\n        retry_delay = 1  # seconds\n        \n        for attempt in range(max_retries):\n            try:\n                with transaction.atomic():\n                    # Perform migration operation\n                    for post in Post.objects.all():\n                        post.search_vector = SearchVector('title', 'content')\n                        post.save()\n                \n                # Success - break out of retry loop\n                break\n                \n            except OperationalError as e:\n                if attempt \u003C max_retries - 1:\n                    print(f\"Migration attempt {attempt + 1} failed: {e}\")\n                    print(f\"Retrying in {retry_delay} seconds...\")\n                    time.sleep(retry_delay)\n                    retry_delay *= 2  # Exponential backoff\n                else:\n                    print(f\"Migration failed after {max_retries} attempts\")\n                    raise\n    \n    @staticmethod\n    def migration_with_progress_tracking(apps, schema_editor):\n        \"\"\"Migration that tracks progress and can resume\"\"\"\n        \n        Post = apps.get_model('blog', 'Post')\n        \n        # Check for existing progress marker\n        from django.core.cache import cache\n        \n        migration_key = 'migration_progress_post_slugs'\n        last_processed_id = cache.get(migration_key, 0)\n        \n        try:\n            posts_to_process = Post.objects.filter(\n                id__gt=last_processed_id,\n                slug__isnull=True\n            ).order_by('id')\n            \n            batch_size = 100\n            \n            for i in range(0, posts_to_process.count(), batch_size):\n                batch = posts_to_process[i:i + batch_size]\n                \n                with transaction.atomic():\n                    for post in batch:\n                        post.slug = slugify(post.title)\n                        post.save()\n                        \n                        # Update progress marker\n                        cache.set(migration_key, post.id, timeout=3600)\n                \n                print(f\"Processed batch ending with ID {batch.last().id}\")\n        \n        finally:\n            # Clean up progress marker on completion\n            cache.delete(migration_key)\n    \n    @staticmethod\n    def migration_with_validation(apps, schema_editor):\n        \"\"\"Migration with built-in validation and rollback\"\"\"\n        \n        Post = apps.get_model('blog', 'Post')\n        \n        # Store original state for validation\n        original_count = Post.objects.count()\n        \n        with transaction.atomic():\n            savepoint = transaction.savepoint()\n            \n            try:\n                # Perform migration\n                Post.objects.filter(status='draft').update(\n                    status='published',\n                    published_at=timezone.now()\n                )\n                \n                # Validate results\n                published_count = Post.objects.filter(status='published').count()\n                \n                if published_count == 0:\n                    raise ValueError(\"No posts were published - this seems wrong\")\n                \n                # Additional validation\n                if Post.objects.count() != original_count:\n                    raise ValueError(\"Post count changed unexpectedly\")\n                \n                # Commit if validation passes\n                transaction.savepoint_commit(savepoint)\n                print(f\"Successfully published {published_count} posts\")\n                \n            except Exception as e:\n                # Rollback on validation failure\n                transaction.savepoint_rollback(savepoint)\n                print(f\"Migration validation failed: {e}\")\n                raise\n\n# Error recovery utilities\nclass MigrationErrorRecovery:\n    \"\"\"Utilities for recovering from migration errors\"\"\"\n    \n    @staticmethod\n    def create_recovery_migration(failed_migration_name, error_details):\n        \"\"\"Create a recovery migration for a failed migration\"\"\"\n        \n        recovery_operations = []\n        \n        # Analyze error and create appropriate recovery operations\n        if 'duplicate key' in error_details.lower():\n            recovery_operations.append(\n                migrations.RunSQL(\n                    sql=\"-- Remove duplicate entries before retrying\",\n                    reverse_sql=\"-- No reverse operation needed\",\n                )\n            )\n        \n        elif 'column does not exist' in error_details.lower():\n            recovery_operations.append(\n                migrations.RunSQL(\n                    sql=\"-- Add missing column\",\n                    reverse_sql=\"-- Remove column if needed\",\n                )\n            )\n        \n        # Generate recovery migration content\n        recovery_migration = f'''\nfrom django.db import migrations, models\n\nclass Migration(migrations.Migration):\n    \"\"\"Recovery migration for {failed_migration_name}\"\"\"\n    \n    dependencies = [\n        # Add appropriate dependencies\n    ]\n    \n    operations = {recovery_operations}\n'''\n        \n        return recovery_migration\n    \n    @staticmethod\n    def analyze_migration_failure(migration_name, error):\n        \"\"\"Analyze migration failure and suggest recovery steps\"\"\"\n        \n        analysis = {\n            'migration': migration_name,\n            'error_type': type(error).__name__,\n            'error_message': str(error),\n            'suggested_actions': [],\n            'recovery_strategy': 'manual'\n        }\n        \n        error_msg = str(error).lower()\n        \n        # Common error patterns and solutions\n        if 'duplicate key' in error_msg or 'unique constraint' in error_msg:\n            analysis['suggested_actions'].extend([\n                \"Identify and remove duplicate records\",\n                \"Add data cleaning step before migration\",\n                \"Consider using get_or_create instead of create\"\n            ])\n            analysis['recovery_strategy'] = 'data_cleanup'\n        \n        elif 'column does not exist' in error_msg:\n            analysis['suggested_actions'].extend([\n                \"Check if previous migration was applied\",\n                \"Verify migration dependencies\",\n                \"Consider fake-applying missing migrations\"\n            ])\n            analysis['recovery_strategy'] = 'dependency_fix'\n        \n        elif 'table does not exist' in error_msg:\n            analysis['suggested_actions'].extend([\n                \"Run initial migrations first\",\n                \"Check database connection and permissions\",\n                \"Verify app is in INSTALLED_APPS\"\n            ])\n            analysis['recovery_strategy'] = 'setup_issue'\n        \n        elif 'timeout' in error_msg or 'lock' in error_msg:\n            analysis['suggested_actions'].extend([\n                \"Run migration during low-traffic period\",\n                \"Consider breaking migration into smaller parts\",\n                \"Check for long-running queries blocking migration\"\n            ])\n            analysis['recovery_strategy'] = 'performance_issue'\n        \n        return analysis\n",[1047,3539,3540,3549,3558,3562,3570,3587,3597,3601,3609,3628,3632,3663,3667,3677,3690,3694,3714,3721,3734,3739,3760,3794,3804,3808,3813,3818,3822,3837,3855,3891,3914,3930,3944,3951,3973,3978,3982,3988,4005,4014,4018,4048,4052,4057,4078,4082,4097,4124,4128,4134,4153,4165,4175,4193,4197,4207,4211,4242,4268,4272,4284,4297,4319,4329,4334,4339,4373,4377,4408,4412,4419,4424,4440,4444,4450,4467,4476,4480,4510,4514,4519,4538,4542,4554,4569,4573,4579,4584,4617,4633,4650,4655,4659,4664,4699,4703,4717,4736,4740,4745,4769,4786,4790,4795,4810,4832,4836,4848,4853,4867,4888,4893,4897,4902,4911,4920,4924,4930,4949,4958,4962,4972,4976,4981,5004,5016,5027,5043,5059,5063,5068,5072,5094,5105,5116,5132,5148,5153,5158,5163,5169,5183,5189,5194,5200,5214,5219,5225,5231,5236,5241,5255,5260,5265,5274,5279,5286,5306,5316,5321,5332,5350,5378,5399,5414,5433,5439,5444,5464,5469,5475,5508,5531,5544,5556,5567,5573,5598,5603,5620,5639,5651,5663,5673,5678,5702,5707,5725,5744,5756,5768,5778,5783,5807,5812,5843,5862,5874,5886,5896,5901,5925,5930],{"__ignoreMap":1045},[1050,3541,3542,3544,3547],{"class":1052,"line":1053},[1050,3543,1064],{"class":1063},[1050,3545,3546],{"class":1067}," RobustMigrationPatterns",[1050,3548,1744],{"class":1071},[1050,3550,3551,3553,3556],{"class":1052,"line":1060},[1050,3552,1092],{"class":1091},[1050,3554,3555],{"class":1095},"Patterns for robust migration error handling",[1050,3557,1099],{"class":1091},[1050,3559,3560],{"class":1052,"line":1088},[1050,3561,1106],{"class":1105},[1050,3563,3564,3567],{"class":1052,"line":1102},[1050,3565,3566],{"class":1071},"    @",[1050,3568,3569],{"class":1658},"staticmethod\n",[1050,3571,3572,3574,3577,3579,3581,3583,3585],{"class":1052,"line":1109},[1050,3573,1629],{"class":1063},[1050,3575,3576],{"class":2122}," migration_with_retry_logic",[1050,3578,1072],{"class":1071},[1050,3580,2128],{"class":1644},[1050,3582,1137],{"class":1071},[1050,3584,2133],{"class":1644},[1050,3586,1085],{"class":1071},[1050,3588,3589,3592,3595],{"class":1052,"line":1121},[1050,3590,3591],{"class":1091},"        \"\"\"",[1050,3593,3594],{"class":1095},"Migration with automatic retry on transient failures",[1050,3596,1099],{"class":1091},[1050,3598,3599],{"class":1052,"line":1151},[1050,3600,1683],{"class":1105},[1050,3602,3603,3606],{"class":1052,"line":1157},[1050,3604,3605],{"class":1695},"        import",[1050,3607,3608],{"class":1105}," time\n",[1050,3610,3611,3613,3615,3617,3619,3621,3623,3625],{"class":1052,"line":1162},[1050,3612,1696],{"class":1695},[1050,3614,1699],{"class":1105},[1050,3616,1079],{"class":1071},[1050,3618,1704],{"class":1105},[1050,3620,1707],{"class":1695},[1050,3622,2262],{"class":1105},[1050,3624,1137],{"class":1071},[1050,3626,3627],{"class":1105}," OperationalError\n",[1050,3629,3630],{"class":1052,"line":1168},[1050,3631,1683],{"class":1105},[1050,3633,3634,3637,3639,3641,3643,3645,3647,3649,3651,3653,3655,3657,3659,3661],{"class":1052,"line":1180},[1050,3635,3636],{"class":1105},"        Post ",[1050,3638,1115],{"class":1071},[1050,3640,2158],{"class":1105},[1050,3642,1079],{"class":1071},[1050,3644,2163],{"class":1203},[1050,3646,1072],{"class":1071},[1050,3648,1128],{"class":1127},[1050,3650,1132],{"class":1131},[1050,3652,1128],{"class":1127},[1050,3654,1137],{"class":1071},[1050,3656,1140],{"class":1127},[1050,3658,2178],{"class":1131},[1050,3660,1128],{"class":1127},[1050,3662,1677],{"class":1071},[1050,3664,3665],{"class":1052,"line":1185},[1050,3666,1683],{"class":1105},[1050,3668,3669,3672,3674],{"class":1052,"line":1195},[1050,3670,3671],{"class":1105},"        max_retries ",[1050,3673,1115],{"class":1071},[1050,3675,3676],{"class":1269}," 3\n",[1050,3678,3679,3682,3684,3687],{"class":1052,"line":1210},[1050,3680,3681],{"class":1105},"        retry_delay ",[1050,3683,1115],{"class":1071},[1050,3685,3686],{"class":1269}," 1",[1050,3688,3689],{"class":1056},"  # seconds\n",[1050,3691,3692],{"class":1052,"line":1229},[1050,3693,1683],{"class":1105},[1050,3695,3696,3699,3702,3704,3707,3709,3712],{"class":1052,"line":1246},[1050,3697,3698],{"class":1695},"        for",[1050,3700,3701],{"class":1105}," attempt ",[1050,3703,2329],{"class":1695},[1050,3705,3706],{"class":1632}," range",[1050,3708,1072],{"class":1071},[1050,3710,3711],{"class":1203},"max_retries",[1050,3713,1085],{"class":1071},[1050,3715,3716,3719],{"class":1052,"line":1275},[1050,3717,3718],{"class":1695},"            try",[1050,3720,1744],{"class":1071},[1050,3722,3723,3726,3728,3730,3732],{"class":1052,"line":1281},[1050,3724,3725],{"class":1695},"                with",[1050,3727,2262],{"class":1105},[1050,3729,1079],{"class":1071},[1050,3731,1762],{"class":1203},[1050,3733,2269],{"class":1071},[1050,3735,3736],{"class":1052,"line":1292},[1050,3737,3738],{"class":1056},"                    # Perform migration operation\n",[1050,3740,3741,3744,3746,3748,3750,3752,3754,3756,3758],{"class":1052,"line":1307},[1050,3742,3743],{"class":1695},"                    for",[1050,3745,2326],{"class":1105},[1050,3747,2329],{"class":1695},[1050,3749,2211],{"class":1105},[1050,3751,1079],{"class":1071},[1050,3753,2216],{"class":1729},[1050,3755,1079],{"class":1071},[1050,3757,2292],{"class":1203},[1050,3759,2269],{"class":1071},[1050,3761,3762,3765,3767,3770,3772,3775,3777,3779,3781,3783,3785,3787,3790,3792],{"class":1052,"line":1323},[1050,3763,3764],{"class":1105},"                        post",[1050,3766,1079],{"class":1071},[1050,3768,3769],{"class":1729},"search_vector",[1050,3771,1765],{"class":1071},[1050,3773,3774],{"class":1203}," SearchVector",[1050,3776,1072],{"class":1071},[1050,3778,1128],{"class":1127},[1050,3780,2380],{"class":1131},[1050,3782,1128],{"class":1127},[1050,3784,1137],{"class":1071},[1050,3786,1140],{"class":1127},[1050,3788,3789],{"class":1131},"content",[1050,3791,1128],{"class":1127},[1050,3793,1677],{"class":1071},[1050,3795,3796,3798,3800,3802],{"class":1052,"line":1346},[1050,3797,3764],{"class":1105},[1050,3799,1079],{"class":1071},[1050,3801,2391],{"class":1203},[1050,3803,2224],{"class":1071},[1050,3805,3806],{"class":1052,"line":1351},[1050,3807,3407],{"class":1105},[1050,3809,3810],{"class":1052,"line":1357},[1050,3811,3812],{"class":1056},"                # Success - break out of retry loop\n",[1050,3814,3815],{"class":1052,"line":1362},[1050,3816,3817],{"class":1695},"                break\n",[1050,3819,3820],{"class":1052,"line":1369},[1050,3821,3407],{"class":1105},[1050,3823,3824,3827,3830,3833,3835],{"class":1052,"line":1375},[1050,3825,3826],{"class":1695},"            except",[1050,3828,3829],{"class":1105}," OperationalError ",[1050,3831,3832],{"class":1695},"as",[1050,3834,2750],{"class":1105},[1050,3836,1744],{"class":1071},[1050,3838,3839,3841,3843,3845,3848,3851,3853],{"class":1052,"line":1392},[1050,3840,2344],{"class":1695},[1050,3842,3701],{"class":1105},[1050,3844,2249],{"class":1733},[1050,3846,3847],{"class":1105}," max_retries ",[1050,3849,3850],{"class":1733},"-",[1050,3852,3686],{"class":1269},[1050,3854,1744],{"class":1071},[1050,3856,3857,3860,3862,3864,3867,3869,3872,3874,3876,3878,3881,3883,3885,3887,3889],{"class":1052,"line":1402},[1050,3858,3859],{"class":1632},"                    print",[1050,3861,1072],{"class":1071},[1050,3863,2418],{"class":1063},[1050,3865,3866],{"class":1131},"\"Migration attempt ",[1050,3868,2425],{"class":2424},[1050,3870,3871],{"class":1203},"attempt ",[1050,3873,2307],{"class":1733},[1050,3875,3686],{"class":1269},[1050,3877,2430],{"class":2424},[1050,3879,3880],{"class":1131}," failed: ",[1050,3882,2425],{"class":2424},[1050,3884,2788],{"class":1203},[1050,3886,2430],{"class":2424},[1050,3888,1504],{"class":1131},[1050,3890,1677],{"class":1071},[1050,3892,3893,3895,3897,3899,3902,3904,3907,3909,3912],{"class":1052,"line":1407},[1050,3894,3859],{"class":1632},[1050,3896,1072],{"class":1071},[1050,3898,2418],{"class":1063},[1050,3900,3901],{"class":1131},"\"Retrying in ",[1050,3903,2425],{"class":2424},[1050,3905,3906],{"class":1203},"retry_delay",[1050,3908,2430],{"class":2424},[1050,3910,3911],{"class":1131}," seconds...\"",[1050,3913,1677],{"class":1071},[1050,3915,3916,3919,3921,3924,3926,3928],{"class":1052,"line":1416},[1050,3917,3918],{"class":1105},"                    time",[1050,3920,1079],{"class":1071},[1050,3922,3923],{"class":1203},"sleep",[1050,3925,1072],{"class":1071},[1050,3927,3906],{"class":1203},[1050,3929,1677],{"class":1071},[1050,3931,3932,3935,3938,3941],{"class":1052,"line":1438},[1050,3933,3934],{"class":1105},"                    retry_delay ",[1050,3936,3937],{"class":1071},"*=",[1050,3939,3940],{"class":1269}," 2",[1050,3942,3943],{"class":1056},"  # Exponential backoff\n",[1050,3945,3946,3949],{"class":1052,"line":1443},[1050,3947,3948],{"class":1695},"                else",[1050,3950,1744],{"class":1071},[1050,3952,3953,3955,3957,3959,3962,3964,3966,3968,3971],{"class":1052,"line":1448},[1050,3954,3859],{"class":1632},[1050,3956,1072],{"class":1071},[1050,3958,2418],{"class":1063},[1050,3960,3961],{"class":1131},"\"Migration failed after ",[1050,3963,2425],{"class":2424},[1050,3965,3711],{"class":1203},[1050,3967,2430],{"class":2424},[1050,3969,3970],{"class":1131}," attempts\"",[1050,3972,1677],{"class":1071},[1050,3974,3975],{"class":1052,"line":1454},[1050,3976,3977],{"class":1695},"                    raise\n",[1050,3979,3980],{"class":1052,"line":1464},[1050,3981,1106],{"class":1105},[1050,3983,3984,3986],{"class":1052,"line":1469},[1050,3985,3566],{"class":1071},[1050,3987,3569],{"class":1658},[1050,3989,3990,3992,3995,3997,3999,4001,4003],{"class":1052,"line":1478},[1050,3991,1629],{"class":1063},[1050,3993,3994],{"class":2122}," migration_with_progress_tracking",[1050,3996,1072],{"class":1071},[1050,3998,2128],{"class":1644},[1050,4000,1137],{"class":1071},[1050,4002,2133],{"class":1644},[1050,4004,1085],{"class":1071},[1050,4006,4007,4009,4012],{"class":1052,"line":1484},[1050,4008,3591],{"class":1091},[1050,4010,4011],{"class":1095},"Migration that tracks progress and can resume",[1050,4013,1099],{"class":1091},[1050,4015,4016],{"class":1052,"line":1496},[1050,4017,1683],{"class":1105},[1050,4019,4020,4022,4024,4026,4028,4030,4032,4034,4036,4038,4040,4042,4044,4046],{"class":1052,"line":1514},[1050,4021,3636],{"class":1105},[1050,4023,1115],{"class":1071},[1050,4025,2158],{"class":1105},[1050,4027,1079],{"class":1071},[1050,4029,2163],{"class":1203},[1050,4031,1072],{"class":1071},[1050,4033,1128],{"class":1127},[1050,4035,1132],{"class":1131},[1050,4037,1128],{"class":1127},[1050,4039,1137],{"class":1071},[1050,4041,1140],{"class":1127},[1050,4043,2178],{"class":1131},[1050,4045,1128],{"class":1127},[1050,4047,1677],{"class":1071},[1050,4049,4050],{"class":1052,"line":1531},[1050,4051,1683],{"class":1105},[1050,4053,4054],{"class":1052,"line":1536},[1050,4055,4056],{"class":1056},"        # Check for existing progress marker\n",[1050,4058,4059,4061,4063,4065,4068,4070,4073,4075],{"class":1052,"line":1541},[1050,4060,1696],{"class":1695},[1050,4062,1699],{"class":1105},[1050,4064,1079],{"class":1071},[1050,4066,4067],{"class":1105},"core",[1050,4069,1079],{"class":1071},[1050,4071,4072],{"class":1105},"cache ",[1050,4074,1707],{"class":1695},[1050,4076,4077],{"class":1105}," cache\n",[1050,4079,4080],{"class":1052,"line":1546},[1050,4081,1683],{"class":1105},[1050,4083,4084,4087,4089,4091,4094],{"class":1052,"line":1552},[1050,4085,4086],{"class":1105},"        migration_key ",[1050,4088,1115],{"class":1071},[1050,4090,1140],{"class":1127},[1050,4092,4093],{"class":1131},"migration_progress_post_slugs",[1050,4095,4096],{"class":1127},"'\n",[1050,4098,4099,4102,4104,4107,4109,4112,4114,4117,4119,4122],{"class":1052,"line":1570},[1050,4100,4101],{"class":1105},"        last_processed_id ",[1050,4103,1115],{"class":1071},[1050,4105,4106],{"class":1105}," cache",[1050,4108,1079],{"class":1071},[1050,4110,4111],{"class":1203},"get",[1050,4113,1072],{"class":1071},[1050,4115,4116],{"class":1203},"migration_key",[1050,4118,1137],{"class":1071},[1050,4120,4121],{"class":1269}," 0",[1050,4123,1677],{"class":1071},[1050,4125,4126],{"class":1052,"line":1580},[1050,4127,1683],{"class":1105},[1050,4129,4130,4132],{"class":1052,"line":1585},[1050,4131,2593],{"class":1695},[1050,4133,1744],{"class":1071},[1050,4135,4136,4139,4141,4143,4145,4147,4149,4151],{"class":1052,"line":1594},[1050,4137,4138],{"class":1105},"            posts_to_process ",[1050,4140,1115],{"class":1071},[1050,4142,2211],{"class":1105},[1050,4144,1079],{"class":1071},[1050,4146,2216],{"class":1729},[1050,4148,1079],{"class":1071},[1050,4150,3422],{"class":1203},[1050,4152,1207],{"class":1071},[1050,4154,4155,4158,4160,4163],{"class":1052,"line":1616},[1050,4156,4157],{"class":1213},"                id__gt",[1050,4159,1115],{"class":1071},[1050,4161,4162],{"class":1203},"last_processed_id",[1050,4164,1226],{"class":1071},[1050,4166,4167,4170,4172],{"class":1052,"line":1621},[1050,4168,4169],{"class":1213},"                slug__isnull",[1050,4171,1115],{"class":1071},[1050,4173,4174],{"class":1176},"True\n",[1050,4176,4177,4180,4183,4185,4187,4189,4191],{"class":1052,"line":1626},[1050,4178,4179],{"class":1071},"            ).",[1050,4181,4182],{"class":1203},"order_by",[1050,4184,1072],{"class":1071},[1050,4186,1128],{"class":1127},[1050,4188,3439],{"class":1131},[1050,4190,1128],{"class":1127},[1050,4192,1677],{"class":1071},[1050,4194,4195],{"class":1052,"line":1655},[1050,4196,2318],{"class":1105},[1050,4198,4199,4202,4204],{"class":1052,"line":1680},[1050,4200,4201],{"class":1105},"            batch_size ",[1050,4203,1115],{"class":1071},[1050,4205,4206],{"class":1269}," 100\n",[1050,4208,4209],{"class":1052,"line":1686},[1050,4210,2318],{"class":1105},[1050,4212,4213,4215,4218,4220,4222,4224,4226,4228,4231,4233,4235,4238,4240],{"class":1052,"line":1692},[1050,4214,2323],{"class":1695},[1050,4216,4217],{"class":1105}," i ",[1050,4219,2329],{"class":1695},[1050,4221,3706],{"class":1632},[1050,4223,1072],{"class":1071},[1050,4225,1270],{"class":1269},[1050,4227,1137],{"class":1071},[1050,4229,4230],{"class":1203}," posts_to_process",[1050,4232,1079],{"class":1071},[1050,4234,2221],{"class":1203},[1050,4236,4237],{"class":1071},"(),",[1050,4239,2310],{"class":1203},[1050,4241,1085],{"class":1071},[1050,4243,4244,4247,4249,4251,4254,4257,4259,4262,4264,4266],{"class":1052,"line":1713},[1050,4245,4246],{"class":1105},"                batch ",[1050,4248,1115],{"class":1071},[1050,4250,4230],{"class":1105},[1050,4252,4253],{"class":1071},"[",[1050,4255,4256],{"class":1105},"i",[1050,4258,2301],{"class":1071},[1050,4260,4261],{"class":1105},"i ",[1050,4263,2307],{"class":1733},[1050,4265,2310],{"class":1105},[1050,4267,2313],{"class":1071},[1050,4269,4270],{"class":1052,"line":1718},[1050,4271,3407],{"class":1105},[1050,4273,4274,4276,4278,4280,4282],{"class":1052,"line":1747},[1050,4275,3725],{"class":1695},[1050,4277,2262],{"class":1105},[1050,4279,1079],{"class":1071},[1050,4281,1762],{"class":1203},[1050,4283,2269],{"class":1071},[1050,4285,4286,4288,4290,4292,4295],{"class":1052,"line":1753},[1050,4287,3743],{"class":1695},[1050,4289,2326],{"class":1105},[1050,4291,2329],{"class":1695},[1050,4293,4294],{"class":1105}," batch",[1050,4296,1744],{"class":1071},[1050,4298,4299,4301,4303,4305,4307,4309,4311,4313,4315,4317],{"class":1052,"line":1770},[1050,4300,3764],{"class":1105},[1050,4302,1079],{"class":1071},[1050,4304,2355],{"class":1729},[1050,4306,1765],{"class":1071},[1050,4308,2371],{"class":1203},[1050,4310,1072],{"class":1071},[1050,4312,1221],{"class":1203},[1050,4314,1079],{"class":1071},[1050,4316,2380],{"class":1729},[1050,4318,1677],{"class":1071},[1050,4320,4321,4323,4325,4327],{"class":1052,"line":1793},[1050,4322,3764],{"class":1105},[1050,4324,1079],{"class":1071},[1050,4326,2391],{"class":1203},[1050,4328,2224],{"class":1071},[1050,4330,4331],{"class":1052,"line":1799},[1050,4332,4333],{"class":1105},"                        \n",[1050,4335,4336],{"class":1052,"line":1812},[1050,4337,4338],{"class":1056},"                        # Update progress marker\n",[1050,4340,4341,4344,4346,4349,4351,4353,4355,4357,4359,4361,4363,4366,4368,4371],{"class":1052,"line":1820},[1050,4342,4343],{"class":1105},"                        cache",[1050,4345,1079],{"class":1071},[1050,4347,4348],{"class":1203},"set",[1050,4350,1072],{"class":1071},[1050,4352,4116],{"class":1203},[1050,4354,1137],{"class":1071},[1050,4356,2350],{"class":1203},[1050,4358,1079],{"class":1071},[1050,4360,3439],{"class":1729},[1050,4362,1137],{"class":1071},[1050,4364,4365],{"class":1213}," timeout",[1050,4367,1115],{"class":1071},[1050,4369,4370],{"class":1269},"3600",[1050,4372,1677],{"class":1071},[1050,4374,4375],{"class":1052,"line":1826},[1050,4376,3407],{"class":1105},[1050,4378,4379,4381,4383,4385,4388,4390,4393,4395,4398,4400,4402,4404,4406],{"class":1052,"line":1839},[1050,4380,3501],{"class":1632},[1050,4382,1072],{"class":1071},[1050,4384,2418],{"class":1063},[1050,4386,4387],{"class":1131},"\"Processed batch ending with ID ",[1050,4389,2425],{"class":2424},[1050,4391,4392],{"class":1203},"batch",[1050,4394,1079],{"class":1071},[1050,4396,4397],{"class":1203},"last",[1050,4399,1662],{"class":1071},[1050,4401,3439],{"class":1729},[1050,4403,2430],{"class":2424},[1050,4405,1504],{"class":1131},[1050,4407,1677],{"class":1071},[1050,4409,4410],{"class":1052,"line":1844},[1050,4411,1683],{"class":1105},[1050,4413,4414,4417],{"class":1052,"line":1853},[1050,4415,4416],{"class":1695},"        finally",[1050,4418,1744],{"class":1071},[1050,4420,4421],{"class":1052,"line":1865},[1050,4422,4423],{"class":1056},"            # Clean up progress marker on completion\n",[1050,4425,4426,4429,4431,4434,4436,4438],{"class":1052,"line":1880},[1050,4427,4428],{"class":1105},"            cache",[1050,4430,1079],{"class":1071},[1050,4432,4433],{"class":1203},"delete",[1050,4435,1072],{"class":1071},[1050,4437,4116],{"class":1203},[1050,4439,1677],{"class":1071},[1050,4441,4442],{"class":1052,"line":1926},[1050,4443,1106],{"class":1105},[1050,4445,4446,4448],{"class":1052,"line":1931},[1050,4447,3566],{"class":1071},[1050,4449,3569],{"class":1658},[1050,4451,4452,4454,4457,4459,4461,4463,4465],{"class":1052,"line":2802},[1050,4453,1629],{"class":1063},[1050,4455,4456],{"class":2122}," migration_with_validation",[1050,4458,1072],{"class":1071},[1050,4460,2128],{"class":1644},[1050,4462,1137],{"class":1071},[1050,4464,2133],{"class":1644},[1050,4466,1085],{"class":1071},[1050,4468,4469,4471,4474],{"class":1052,"line":2807},[1050,4470,3591],{"class":1091},[1050,4472,4473],{"class":1095},"Migration with built-in validation and rollback",[1050,4475,1099],{"class":1091},[1050,4477,4478],{"class":1052,"line":2813},[1050,4479,1683],{"class":1105},[1050,4481,4482,4484,4486,4488,4490,4492,4494,4496,4498,4500,4502,4504,4506,4508],{"class":1052,"line":2831},[1050,4483,3636],{"class":1105},[1050,4485,1115],{"class":1071},[1050,4487,2158],{"class":1105},[1050,4489,1079],{"class":1071},[1050,4491,2163],{"class":1203},[1050,4493,1072],{"class":1071},[1050,4495,1128],{"class":1127},[1050,4497,1132],{"class":1131},[1050,4499,1128],{"class":1127},[1050,4501,1137],{"class":1071},[1050,4503,1140],{"class":1127},[1050,4505,2178],{"class":1131},[1050,4507,1128],{"class":1127},[1050,4509,1677],{"class":1071},[1050,4511,4512],{"class":1052,"line":2841},[1050,4513,1683],{"class":1105},[1050,4515,4516],{"class":1052,"line":2846},[1050,4517,4518],{"class":1056},"        # Store original state for validation\n",[1050,4520,4521,4524,4526,4528,4530,4532,4534,4536],{"class":1052,"line":2855},[1050,4522,4523],{"class":1105},"        original_count ",[1050,4525,1115],{"class":1071},[1050,4527,2211],{"class":1105},[1050,4529,1079],{"class":1071},[1050,4531,2216],{"class":1729},[1050,4533,1079],{"class":1071},[1050,4535,2221],{"class":1203},[1050,4537,2224],{"class":1071},[1050,4539,4540],{"class":1052,"line":2877},[1050,4541,1683],{"class":1105},[1050,4543,4544,4546,4548,4550,4552],{"class":1052,"line":2882},[1050,4545,2259],{"class":1695},[1050,4547,2262],{"class":1105},[1050,4549,1079],{"class":1071},[1050,4551,1762],{"class":1203},[1050,4553,2269],{"class":1071},[1050,4555,4556,4559,4561,4563,4565,4567],{"class":1052,"line":2887},[1050,4557,4558],{"class":1105},"            savepoint ",[1050,4560,1115],{"class":1071},[1050,4562,2262],{"class":1105},[1050,4564,1079],{"class":1071},[1050,4566,2582],{"class":1203},[1050,4568,2224],{"class":1071},[1050,4570,4571],{"class":1052,"line":2908},[1050,4572,2318],{"class":1105},[1050,4574,4575,4577],{"class":1052,"line":2927},[1050,4576,3718],{"class":1695},[1050,4578,1744],{"class":1071},[1050,4580,4581],{"class":1052,"line":2932},[1050,4582,4583],{"class":1056},"                # Perform migration\n",[1050,4585,4586,4588,4590,4592,4594,4596,4598,4601,4603,4605,4608,4610,4613,4615],{"class":1052,"line":2938},[1050,4587,3413],{"class":1105},[1050,4589,1079],{"class":1071},[1050,4591,2216],{"class":1729},[1050,4593,1079],{"class":1071},[1050,4595,3422],{"class":1203},[1050,4597,1072],{"class":1071},[1050,4599,4600],{"class":1213},"status",[1050,4602,1115],{"class":1071},[1050,4604,1128],{"class":1127},[1050,4606,4607],{"class":1131},"draft",[1050,4609,1128],{"class":1127},[1050,4611,4612],{"class":1071},").",[1050,4614,3460],{"class":1203},[1050,4616,1207],{"class":1071},[1050,4618,4619,4622,4624,4626,4629,4631],{"class":1052,"line":2953},[1050,4620,4621],{"class":1213},"                    status",[1050,4623,1115],{"class":1071},[1050,4625,1128],{"class":1127},[1050,4627,4628],{"class":1131},"published",[1050,4630,1128],{"class":1127},[1050,4632,1226],{"class":1071},[1050,4634,4635,4638,4640,4643,4645,4648],{"class":1052,"line":2958},[1050,4636,4637],{"class":1213},"                    published_at",[1050,4639,1115],{"class":1071},[1050,4641,4642],{"class":1203},"timezone",[1050,4644,1079],{"class":1071},[1050,4646,4647],{"class":1203},"now",[1050,4649,2224],{"class":1071},[1050,4651,4652],{"class":1052,"line":2980},[1050,4653,4654],{"class":1071},"                )\n",[1050,4656,4657],{"class":1052,"line":3002},[1050,4658,3407],{"class":1105},[1050,4660,4661],{"class":1052,"line":3023},[1050,4662,4663],{"class":1056},"                # Validate results\n",[1050,4665,4666,4669,4671,4673,4675,4677,4679,4681,4683,4685,4687,4689,4691,4693,4695,4697],{"class":1052,"line":3028},[1050,4667,4668],{"class":1105},"                published_count ",[1050,4670,1115],{"class":1071},[1050,4672,2211],{"class":1105},[1050,4674,1079],{"class":1071},[1050,4676,2216],{"class":1729},[1050,4678,1079],{"class":1071},[1050,4680,3422],{"class":1203},[1050,4682,1072],{"class":1071},[1050,4684,4600],{"class":1213},[1050,4686,1115],{"class":1071},[1050,4688,1128],{"class":1127},[1050,4690,4628],{"class":1131},[1050,4692,1128],{"class":1127},[1050,4694,4612],{"class":1071},[1050,4696,2221],{"class":1203},[1050,4698,2224],{"class":1071},[1050,4700,4701],{"class":1052,"line":3034},[1050,4702,3407],{"class":1105},[1050,4704,4705,4707,4710,4713,4715],{"class":1052,"line":3053},[1050,4706,2344],{"class":1695},[1050,4708,4709],{"class":1105}," published_count ",[1050,4711,4712],{"class":1733},"==",[1050,4714,4121],{"class":1269},[1050,4716,1744],{"class":1071},[1050,4718,4719,4722,4725,4727,4729,4732,4734],{"class":1052,"line":3058},[1050,4720,4721],{"class":1695},"                    raise",[1050,4723,4724],{"class":1658}," ValueError",[1050,4726,1072],{"class":1071},[1050,4728,1504],{"class":1127},[1050,4730,4731],{"class":1131},"No posts were published - this seems wrong",[1050,4733,1504],{"class":1127},[1050,4735,1677],{"class":1071},[1050,4737,4738],{"class":1052,"line":3067},[1050,4739,3407],{"class":1105},[1050,4741,4742],{"class":1052,"line":3078},[1050,4743,4744],{"class":1056},"                # Additional validation\n",[1050,4746,4747,4749,4751,4753,4755,4757,4759,4761,4764,4767],{"class":1052,"line":3090},[1050,4748,2344],{"class":1695},[1050,4750,2211],{"class":1105},[1050,4752,1079],{"class":1071},[1050,4754,2216],{"class":1729},[1050,4756,1079],{"class":1071},[1050,4758,2221],{"class":1203},[1050,4760,2970],{"class":1071},[1050,4762,4763],{"class":1733}," !=",[1050,4765,4766],{"class":1105}," original_count",[1050,4768,1744],{"class":1071},[1050,4770,4771,4773,4775,4777,4779,4782,4784],{"class":1052,"line":3109},[1050,4772,4721],{"class":1695},[1050,4774,4724],{"class":1658},[1050,4776,1072],{"class":1071},[1050,4778,1504],{"class":1127},[1050,4780,4781],{"class":1131},"Post count changed unexpectedly",[1050,4783,1504],{"class":1127},[1050,4785,1677],{"class":1071},[1050,4787,4788],{"class":1052,"line":3114},[1050,4789,3407],{"class":1105},[1050,4791,4792],{"class":1052,"line":3119},[1050,4793,4794],{"class":1056},"                # Commit if validation passes\n",[1050,4796,4797,4800,4802,4804,4806,4808],{"class":1052,"line":3124},[1050,4798,4799],{"class":1105},"                transaction",[1050,4801,1079],{"class":1071},[1050,4803,2726],{"class":1203},[1050,4805,1072],{"class":1071},[1050,4807,2582],{"class":1203},[1050,4809,1677],{"class":1071},[1050,4811,4812,4814,4816,4818,4821,4823,4826,4828,4830],{"class":1052,"line":3142},[1050,4813,3501],{"class":1632},[1050,4815,1072],{"class":1071},[1050,4817,2418],{"class":1063},[1050,4819,4820],{"class":1131},"\"Successfully published ",[1050,4822,2425],{"class":2424},[1050,4824,4825],{"class":1203},"published_count",[1050,4827,2430],{"class":2424},[1050,4829,2443],{"class":1131},[1050,4831,1677],{"class":1071},[1050,4833,4834],{"class":1052,"line":3152},[1050,4835,3407],{"class":1105},[1050,4837,4838,4840,4842,4844,4846],{"class":1052,"line":3157},[1050,4839,3826],{"class":1695},[1050,4841,2744],{"class":1658},[1050,4843,2747],{"class":1695},[1050,4845,2750],{"class":1105},[1050,4847,1744],{"class":1071},[1050,4849,4850],{"class":1052,"line":3188},[1050,4851,4852],{"class":1056},"                # Rollback on validation failure\n",[1050,4854,4855,4857,4859,4861,4863,4865],{"class":1052,"line":3207},[1050,4856,4799],{"class":1105},[1050,4858,1079],{"class":1071},[1050,4860,2766],{"class":1203},[1050,4862,1072],{"class":1071},[1050,4864,2582],{"class":1203},[1050,4866,1677],{"class":1071},[1050,4868,4869,4871,4873,4875,4878,4880,4882,4884,4886],{"class":1052,"line":3212},[1050,4870,3501],{"class":1632},[1050,4872,1072],{"class":1071},[1050,4874,2418],{"class":1063},[1050,4876,4877],{"class":1131},"\"Migration validation failed: ",[1050,4879,2425],{"class":2424},[1050,4881,2788],{"class":1203},[1050,4883,2430],{"class":2424},[1050,4885,1504],{"class":1131},[1050,4887,1677],{"class":1071},[1050,4889,4890],{"class":1052,"line":3228},[1050,4891,4892],{"class":1695},"                raise\n",[1050,4894,4895],{"class":1052,"line":3234},[1050,4896,1366],{"emptyLinePlaceholder":1365},[1050,4898,4899],{"class":1052,"line":3247},[1050,4900,4901],{"class":1056},"# Error recovery utilities\n",[1050,4903,4904,4906,4909],{"class":1052,"line":3268},[1050,4905,1064],{"class":1063},[1050,4907,4908],{"class":1067}," MigrationErrorRecovery",[1050,4910,1744],{"class":1071},[1050,4912,4913,4915,4918],{"class":1052,"line":3288},[1050,4914,1092],{"class":1091},[1050,4916,4917],{"class":1095},"Utilities for recovering from migration errors",[1050,4919,1099],{"class":1091},[1050,4921,4922],{"class":1052,"line":3299},[1050,4923,1106],{"class":1105},[1050,4925,4926,4928],{"class":1052,"line":3304},[1050,4927,3566],{"class":1071},[1050,4929,3569],{"class":1658},[1050,4931,4932,4934,4937,4939,4942,4944,4947],{"class":1052,"line":3312},[1050,4933,1629],{"class":1063},[1050,4935,4936],{"class":2122}," create_recovery_migration",[1050,4938,1072],{"class":1071},[1050,4940,4941],{"class":1644},"failed_migration_name",[1050,4943,1137],{"class":1071},[1050,4945,4946],{"class":1644}," error_details",[1050,4948,1085],{"class":1071},[1050,4950,4951,4953,4956],{"class":1052,"line":3318},[1050,4952,3591],{"class":1091},[1050,4954,4955],{"class":1095},"Create a recovery migration for a failed migration",[1050,4957,1099],{"class":1091},[1050,4959,4960],{"class":1052,"line":3329},[1050,4961,1683],{"class":1105},[1050,4963,4964,4967,4969],{"class":1052,"line":3339},[1050,4965,4966],{"class":1105},"        recovery_operations ",[1050,4968,1115],{"class":1071},[1050,4970,4971],{"class":1071}," []\n",[1050,4973,4974],{"class":1052,"line":3344},[1050,4975,1683],{"class":1105},[1050,4977,4978],{"class":1052,"line":3358},[1050,4979,4980],{"class":1056},"        # Analyze error and create appropriate recovery operations\n",[1050,4982,4983,4985,4987,4990,4992,4995,4997,4999,5002],{"class":1052,"line":3372},[1050,4984,1721],{"class":1695},[1050,4986,1140],{"class":1127},[1050,4988,4989],{"class":1131},"duplicate key",[1050,4991,1128],{"class":1127},[1050,4993,4994],{"class":1733}," in",[1050,4996,4946],{"class":1105},[1050,4998,1079],{"class":1071},[1050,5000,5001],{"class":1203},"lower",[1050,5003,2269],{"class":1071},[1050,5005,5006,5009,5011,5014],{"class":1052,"line":3404},[1050,5007,5008],{"class":1105},"            recovery_operations",[1050,5010,1079],{"class":1071},[1050,5012,5013],{"class":1203},"append",[1050,5015,1207],{"class":1071},[1050,5017,5018,5021,5023,5025],{"class":1052,"line":3410},[1050,5019,5020],{"class":1203},"                migrations",[1050,5022,1079],{"class":1071},[1050,5024,1491],{"class":1203},[1050,5026,1207],{"class":1071},[1050,5028,5029,5032,5034,5036,5039,5041],{"class":1052,"line":3427},[1050,5030,5031],{"class":1213},"                    sql",[1050,5033,1115],{"class":1071},[1050,5035,1504],{"class":1127},[1050,5037,5038],{"class":1131},"-- Remove duplicate entries before retrying",[1050,5040,1504],{"class":1127},[1050,5042,1226],{"class":1071},[1050,5044,5045,5048,5050,5052,5055,5057],{"class":1052,"line":3454},[1050,5046,5047],{"class":1213},"                    reverse_sql",[1050,5049,1115],{"class":1071},[1050,5051,1504],{"class":1127},[1050,5053,5054],{"class":1131},"-- No reverse operation needed",[1050,5056,1504],{"class":1127},[1050,5058,1226],{"class":1071},[1050,5060,5061],{"class":1052,"line":3483},[1050,5062,4654],{"class":1071},[1050,5064,5065],{"class":1052,"line":3488},[1050,5066,5067],{"class":1071},"            )\n",[1050,5069,5070],{"class":1052,"line":3498},[1050,5071,1683],{"class":1105},[1050,5073,5075,5077,5079,5082,5084,5086,5088,5090,5092],{"class":1052,"line":5074},132,[1050,5076,1773],{"class":1695},[1050,5078,1140],{"class":1127},[1050,5080,5081],{"class":1131},"column does not exist",[1050,5083,1128],{"class":1127},[1050,5085,4994],{"class":1733},[1050,5087,4946],{"class":1105},[1050,5089,1079],{"class":1071},[1050,5091,5001],{"class":1203},[1050,5093,2269],{"class":1071},[1050,5095,5097,5099,5101,5103],{"class":1052,"line":5096},133,[1050,5098,5008],{"class":1105},[1050,5100,1079],{"class":1071},[1050,5102,5013],{"class":1203},[1050,5104,1207],{"class":1071},[1050,5106,5108,5110,5112,5114],{"class":1052,"line":5107},134,[1050,5109,5020],{"class":1203},[1050,5111,1079],{"class":1071},[1050,5113,1491],{"class":1203},[1050,5115,1207],{"class":1071},[1050,5117,5119,5121,5123,5125,5128,5130],{"class":1052,"line":5118},135,[1050,5120,5031],{"class":1213},[1050,5122,1115],{"class":1071},[1050,5124,1504],{"class":1127},[1050,5126,5127],{"class":1131},"-- Add missing column",[1050,5129,1504],{"class":1127},[1050,5131,1226],{"class":1071},[1050,5133,5135,5137,5139,5141,5144,5146],{"class":1052,"line":5134},136,[1050,5136,5047],{"class":1213},[1050,5138,1115],{"class":1071},[1050,5140,1504],{"class":1127},[1050,5142,5143],{"class":1131},"-- Remove column if needed",[1050,5145,1504],{"class":1127},[1050,5147,1226],{"class":1071},[1050,5149,5151],{"class":1052,"line":5150},137,[1050,5152,4654],{"class":1071},[1050,5154,5156],{"class":1052,"line":5155},138,[1050,5157,5067],{"class":1071},[1050,5159,5161],{"class":1052,"line":5160},139,[1050,5162,1683],{"class":1105},[1050,5164,5166],{"class":1052,"line":5165},140,[1050,5167,5168],{"class":1056},"        # Generate recovery migration content\n",[1050,5170,5172,5175,5177,5180],{"class":1052,"line":5171},141,[1050,5173,5174],{"class":1105},"        recovery_migration ",[1050,5176,1115],{"class":1071},[1050,5178,5179],{"class":1063}," f",[1050,5181,5182],{"class":1131},"'''\n",[1050,5184,5186],{"class":1052,"line":5185},142,[1050,5187,5188],{"class":1131},"from django.db import migrations, models\n",[1050,5190,5192],{"class":1052,"line":5191},143,[1050,5193,1366],{"emptyLinePlaceholder":1365},[1050,5195,5197],{"class":1052,"line":5196},144,[1050,5198,5199],{"class":1131},"class Migration(migrations.Migration):\n",[1050,5201,5203,5206,5208,5210,5212],{"class":1052,"line":5202},145,[1050,5204,5205],{"class":1131},"    \"\"\"Recovery migration for ",[1050,5207,2425],{"class":2424},[1050,5209,4941],{"class":1105},[1050,5211,2430],{"class":2424},[1050,5213,1099],{"class":1131},[1050,5215,5217],{"class":1052,"line":5216},146,[1050,5218,1106],{"class":1131},[1050,5220,5222],{"class":1052,"line":5221},147,[1050,5223,5224],{"class":1131},"    dependencies = [\n",[1050,5226,5228],{"class":1052,"line":5227},148,[1050,5229,5230],{"class":1131},"        # Add appropriate dependencies\n",[1050,5232,5234],{"class":1052,"line":5233},149,[1050,5235,1154],{"class":1131},[1050,5237,5239],{"class":1052,"line":5238},150,[1050,5240,1106],{"class":1131},[1050,5242,5244,5247,5249,5252],{"class":1052,"line":5243},151,[1050,5245,5246],{"class":1131},"    operations = ",[1050,5248,2425],{"class":2424},[1050,5250,5251],{"class":1105},"recovery_operations",[1050,5253,5254],{"class":2424},"}\n",[1050,5256,5258],{"class":1052,"line":5257},152,[1050,5259,5182],{"class":1131},[1050,5261,5263],{"class":1052,"line":5262},153,[1050,5264,1683],{"class":1105},[1050,5266,5268,5271],{"class":1052,"line":5267},154,[1050,5269,5270],{"class":1695},"        return",[1050,5272,5273],{"class":1105}," recovery_migration\n",[1050,5275,5277],{"class":1052,"line":5276},155,[1050,5278,1106],{"class":1105},[1050,5280,5282,5284],{"class":1052,"line":5281},156,[1050,5283,3566],{"class":1071},[1050,5285,3569],{"class":1658},[1050,5287,5289,5291,5294,5296,5299,5301,5304],{"class":1052,"line":5288},157,[1050,5290,1629],{"class":1063},[1050,5292,5293],{"class":2122}," analyze_migration_failure",[1050,5295,1072],{"class":1071},[1050,5297,5298],{"class":1644},"migration_name",[1050,5300,1137],{"class":1071},[1050,5302,5303],{"class":1644}," error",[1050,5305,1085],{"class":1071},[1050,5307,5309,5311,5314],{"class":1052,"line":5308},158,[1050,5310,3591],{"class":1091},[1050,5312,5313],{"class":1095},"Analyze migration failure and suggest recovery steps",[1050,5315,1099],{"class":1091},[1050,5317,5319],{"class":1052,"line":5318},159,[1050,5320,1683],{"class":1105},[1050,5322,5324,5327,5329],{"class":1052,"line":5323},160,[1050,5325,5326],{"class":1105},"        analysis ",[1050,5328,1115],{"class":1071},[1050,5330,5331],{"class":1071}," {\n",[1050,5333,5335,5338,5341,5343,5345,5348],{"class":1052,"line":5334},161,[1050,5336,5337],{"class":1127},"            '",[1050,5339,5340],{"class":1131},"migration",[1050,5342,1128],{"class":1127},[1050,5344,2301],{"class":1071},[1050,5346,5347],{"class":1105}," migration_name",[1050,5349,1226],{"class":1071},[1050,5351,5353,5355,5358,5360,5362,5365,5367,5370,5372,5376],{"class":1052,"line":5352},162,[1050,5354,5337],{"class":1127},[1050,5356,5357],{"class":1131},"error_type",[1050,5359,1128],{"class":1127},[1050,5361,2301],{"class":1071},[1050,5363,5364],{"class":1658}," type",[1050,5366,1072],{"class":1071},[1050,5368,5369],{"class":1203},"error",[1050,5371,4612],{"class":1071},[1050,5373,5375],{"class":5374},"s131V","__name__",[1050,5377,1226],{"class":1071},[1050,5379,5381,5383,5386,5388,5390,5393,5395,5397],{"class":1052,"line":5380},163,[1050,5382,5337],{"class":1127},[1050,5384,5385],{"class":1131},"error_message",[1050,5387,1128],{"class":1127},[1050,5389,2301],{"class":1071},[1050,5391,5392],{"class":1658}," str",[1050,5394,1072],{"class":1071},[1050,5396,5369],{"class":1203},[1050,5398,1148],{"class":1071},[1050,5400,5402,5404,5407,5409,5411],{"class":1052,"line":5401},164,[1050,5403,5337],{"class":1127},[1050,5405,5406],{"class":1131},"suggested_actions",[1050,5408,1128],{"class":1127},[1050,5410,2301],{"class":1071},[1050,5412,5413],{"class":1071}," [],\n",[1050,5415,5417,5419,5422,5424,5426,5428,5431],{"class":1052,"line":5416},165,[1050,5418,5337],{"class":1127},[1050,5420,5421],{"class":1131},"recovery_strategy",[1050,5423,1128],{"class":1127},[1050,5425,2301],{"class":1071},[1050,5427,1140],{"class":1127},[1050,5429,5430],{"class":1131},"manual",[1050,5432,4096],{"class":1127},[1050,5434,5436],{"class":1052,"line":5435},166,[1050,5437,5438],{"class":1071},"        }\n",[1050,5440,5442],{"class":1052,"line":5441},167,[1050,5443,1683],{"class":1105},[1050,5445,5447,5450,5452,5454,5456,5458,5460,5462],{"class":1052,"line":5446},168,[1050,5448,5449],{"class":1105},"        error_msg ",[1050,5451,1115],{"class":1071},[1050,5453,5392],{"class":1658},[1050,5455,1072],{"class":1071},[1050,5457,5369],{"class":1203},[1050,5459,4612],{"class":1071},[1050,5461,5001],{"class":1203},[1050,5463,2224],{"class":1071},[1050,5465,5467],{"class":1052,"line":5466},169,[1050,5468,1683],{"class":1105},[1050,5470,5472],{"class":1052,"line":5471},170,[1050,5473,5474],{"class":1056},"        # Common error patterns and solutions\n",[1050,5476,5478,5480,5482,5484,5486,5488,5491,5494,5496,5499,5501,5503,5506],{"class":1052,"line":5477},171,[1050,5479,1721],{"class":1695},[1050,5481,1140],{"class":1127},[1050,5483,4989],{"class":1131},[1050,5485,1128],{"class":1127},[1050,5487,4994],{"class":1733},[1050,5489,5490],{"class":1105}," error_msg ",[1050,5492,5493],{"class":1733},"or",[1050,5495,1140],{"class":1127},[1050,5497,5498],{"class":1131},"unique constraint",[1050,5500,1128],{"class":1127},[1050,5502,4994],{"class":1733},[1050,5504,5505],{"class":1105}," error_msg",[1050,5507,1744],{"class":1071},[1050,5509,5511,5514,5516,5518,5520,5522,5525,5528],{"class":1052,"line":5510},172,[1050,5512,5513],{"class":1105},"            analysis",[1050,5515,4253],{"class":1071},[1050,5517,1128],{"class":1127},[1050,5519,5406],{"class":1131},[1050,5521,1128],{"class":1127},[1050,5523,5524],{"class":1071},"].",[1050,5526,5527],{"class":1203},"extend",[1050,5529,5530],{"class":1071},"([\n",[1050,5532,5534,5537,5540,5542],{"class":1052,"line":5533},173,[1050,5535,5536],{"class":1127},"                \"",[1050,5538,5539],{"class":1131},"Identify and remove duplicate records",[1050,5541,1504],{"class":1127},[1050,5543,1226],{"class":1071},[1050,5545,5547,5549,5552,5554],{"class":1052,"line":5546},174,[1050,5548,5536],{"class":1127},[1050,5550,5551],{"class":1131},"Add data cleaning step before migration",[1050,5553,1504],{"class":1127},[1050,5555,1226],{"class":1071},[1050,5557,5559,5561,5564],{"class":1052,"line":5558},175,[1050,5560,5536],{"class":1127},[1050,5562,5563],{"class":1131},"Consider using get_or_create instead of create",[1050,5565,5566],{"class":1127},"\"\n",[1050,5568,5570],{"class":1052,"line":5569},176,[1050,5571,5572],{"class":1071},"            ])\n",[1050,5574,5576,5578,5580,5582,5584,5586,5589,5591,5593,5596],{"class":1052,"line":5575},177,[1050,5577,5513],{"class":1105},[1050,5579,4253],{"class":1071},[1050,5581,1128],{"class":1127},[1050,5583,5421],{"class":1131},[1050,5585,1128],{"class":1127},[1050,5587,5588],{"class":1071},"]",[1050,5590,1765],{"class":1071},[1050,5592,1140],{"class":1127},[1050,5594,5595],{"class":1131},"data_cleanup",[1050,5597,4096],{"class":1127},[1050,5599,5601],{"class":1052,"line":5600},178,[1050,5602,1683],{"class":1105},[1050,5604,5606,5608,5610,5612,5614,5616,5618],{"class":1052,"line":5605},179,[1050,5607,1773],{"class":1695},[1050,5609,1140],{"class":1127},[1050,5611,5081],{"class":1131},[1050,5613,1128],{"class":1127},[1050,5615,4994],{"class":1733},[1050,5617,5505],{"class":1105},[1050,5619,1744],{"class":1071},[1050,5621,5623,5625,5627,5629,5631,5633,5635,5637],{"class":1052,"line":5622},180,[1050,5624,5513],{"class":1105},[1050,5626,4253],{"class":1071},[1050,5628,1128],{"class":1127},[1050,5630,5406],{"class":1131},[1050,5632,1128],{"class":1127},[1050,5634,5524],{"class":1071},[1050,5636,5527],{"class":1203},[1050,5638,5530],{"class":1071},[1050,5640,5642,5644,5647,5649],{"class":1052,"line":5641},181,[1050,5643,5536],{"class":1127},[1050,5645,5646],{"class":1131},"Check if previous migration was applied",[1050,5648,1504],{"class":1127},[1050,5650,1226],{"class":1071},[1050,5652,5654,5656,5659,5661],{"class":1052,"line":5653},182,[1050,5655,5536],{"class":1127},[1050,5657,5658],{"class":1131},"Verify migration dependencies",[1050,5660,1504],{"class":1127},[1050,5662,1226],{"class":1071},[1050,5664,5666,5668,5671],{"class":1052,"line":5665},183,[1050,5667,5536],{"class":1127},[1050,5669,5670],{"class":1131},"Consider fake-applying missing migrations",[1050,5672,5566],{"class":1127},[1050,5674,5676],{"class":1052,"line":5675},184,[1050,5677,5572],{"class":1071},[1050,5679,5681,5683,5685,5687,5689,5691,5693,5695,5697,5700],{"class":1052,"line":5680},185,[1050,5682,5513],{"class":1105},[1050,5684,4253],{"class":1071},[1050,5686,1128],{"class":1127},[1050,5688,5421],{"class":1131},[1050,5690,1128],{"class":1127},[1050,5692,5588],{"class":1071},[1050,5694,1765],{"class":1071},[1050,5696,1140],{"class":1127},[1050,5698,5699],{"class":1131},"dependency_fix",[1050,5701,4096],{"class":1127},[1050,5703,5705],{"class":1052,"line":5704},186,[1050,5706,1683],{"class":1105},[1050,5708,5710,5712,5714,5717,5719,5721,5723],{"class":1052,"line":5709},187,[1050,5711,1773],{"class":1695},[1050,5713,1140],{"class":1127},[1050,5715,5716],{"class":1131},"table does not exist",[1050,5718,1128],{"class":1127},[1050,5720,4994],{"class":1733},[1050,5722,5505],{"class":1105},[1050,5724,1744],{"class":1071},[1050,5726,5728,5730,5732,5734,5736,5738,5740,5742],{"class":1052,"line":5727},188,[1050,5729,5513],{"class":1105},[1050,5731,4253],{"class":1071},[1050,5733,1128],{"class":1127},[1050,5735,5406],{"class":1131},[1050,5737,1128],{"class":1127},[1050,5739,5524],{"class":1071},[1050,5741,5527],{"class":1203},[1050,5743,5530],{"class":1071},[1050,5745,5747,5749,5752,5754],{"class":1052,"line":5746},189,[1050,5748,5536],{"class":1127},[1050,5750,5751],{"class":1131},"Run initial migrations first",[1050,5753,1504],{"class":1127},[1050,5755,1226],{"class":1071},[1050,5757,5759,5761,5764,5766],{"class":1052,"line":5758},190,[1050,5760,5536],{"class":1127},[1050,5762,5763],{"class":1131},"Check database connection and permissions",[1050,5765,1504],{"class":1127},[1050,5767,1226],{"class":1071},[1050,5769,5771,5773,5776],{"class":1052,"line":5770},191,[1050,5772,5536],{"class":1127},[1050,5774,5775],{"class":1131},"Verify app is in INSTALLED_APPS",[1050,5777,5566],{"class":1127},[1050,5779,5781],{"class":1052,"line":5780},192,[1050,5782,5572],{"class":1071},[1050,5784,5786,5788,5790,5792,5794,5796,5798,5800,5802,5805],{"class":1052,"line":5785},193,[1050,5787,5513],{"class":1105},[1050,5789,4253],{"class":1071},[1050,5791,1128],{"class":1127},[1050,5793,5421],{"class":1131},[1050,5795,1128],{"class":1127},[1050,5797,5588],{"class":1071},[1050,5799,1765],{"class":1071},[1050,5801,1140],{"class":1127},[1050,5803,5804],{"class":1131},"setup_issue",[1050,5806,4096],{"class":1127},[1050,5808,5810],{"class":1052,"line":5809},194,[1050,5811,1683],{"class":1105},[1050,5813,5815,5817,5819,5822,5824,5826,5828,5830,5832,5835,5837,5839,5841],{"class":1052,"line":5814},195,[1050,5816,1773],{"class":1695},[1050,5818,1140],{"class":1127},[1050,5820,5821],{"class":1131},"timeout",[1050,5823,1128],{"class":1127},[1050,5825,4994],{"class":1733},[1050,5827,5490],{"class":1105},[1050,5829,5493],{"class":1733},[1050,5831,1140],{"class":1127},[1050,5833,5834],{"class":1131},"lock",[1050,5836,1128],{"class":1127},[1050,5838,4994],{"class":1733},[1050,5840,5505],{"class":1105},[1050,5842,1744],{"class":1071},[1050,5844,5846,5848,5850,5852,5854,5856,5858,5860],{"class":1052,"line":5845},196,[1050,5847,5513],{"class":1105},[1050,5849,4253],{"class":1071},[1050,5851,1128],{"class":1127},[1050,5853,5406],{"class":1131},[1050,5855,1128],{"class":1127},[1050,5857,5524],{"class":1071},[1050,5859,5527],{"class":1203},[1050,5861,5530],{"class":1071},[1050,5863,5865,5867,5870,5872],{"class":1052,"line":5864},197,[1050,5866,5536],{"class":1127},[1050,5868,5869],{"class":1131},"Run migration during low-traffic period",[1050,5871,1504],{"class":1127},[1050,5873,1226],{"class":1071},[1050,5875,5877,5879,5882,5884],{"class":1052,"line":5876},198,[1050,5878,5536],{"class":1127},[1050,5880,5881],{"class":1131},"Consider breaking migration into smaller parts",[1050,5883,1504],{"class":1127},[1050,5885,1226],{"class":1071},[1050,5887,5889,5891,5894],{"class":1052,"line":5888},199,[1050,5890,5536],{"class":1127},[1050,5892,5893],{"class":1131},"Check for long-running queries blocking migration",[1050,5895,5566],{"class":1127},[1050,5897,5899],{"class":1052,"line":5898},200,[1050,5900,5572],{"class":1071},[1050,5902,5904,5906,5908,5910,5912,5914,5916,5918,5920,5923],{"class":1052,"line":5903},201,[1050,5905,5513],{"class":1105},[1050,5907,4253],{"class":1071},[1050,5909,1128],{"class":1127},[1050,5911,5421],{"class":1131},[1050,5913,1128],{"class":1127},[1050,5915,5588],{"class":1071},[1050,5917,1765],{"class":1071},[1050,5919,1140],{"class":1127},[1050,5921,5922],{"class":1131},"performance_issue",[1050,5924,4096],{"class":1127},[1050,5926,5928],{"class":1052,"line":5927},202,[1050,5929,1683],{"class":1105},[1050,5931,5933,5935],{"class":1052,"line":5932},203,[1050,5934,5270],{"class":1695},[1050,5936,5937],{"class":1105}," analysis\n",[1030,5939,5941],{"id":5940},"advanced-transaction-patterns","Advanced Transaction Patterns",[1035,5943,5945],{"id":5944},"cross-database-transactions","Cross-Database Transactions",[1040,5947,5949],{"className":1042,"code":5948,"language":1044,"meta":1045,"style":1045},"# Handling multiple databases in migrations\nclass MultiDatabaseMigration(migrations.Migration):\n    \"\"\"Migration that works with multiple databases\"\"\"\n    \n    dependencies = [\n        ('blog', '0006_conditional_transaction'),\n    ]\n    \n    operations = [\n        migrations.RunPython(\n            code=migrate_across_databases,\n            reverse_code=migrations.RunPython.noop,\n        ),\n    ]\n\ndef migrate_across_databases(apps, schema_editor):\n    \"\"\"Migrate data across multiple databases\"\"\"\n    \n    from django.db import connections, transaction\n    \n    # Get database connections\n    default_db = connections['default']\n    analytics_db = connections['analytics']\n    \n    Post = apps.get_model('blog', 'Post')\n    \n    # Note: Cross-database transactions are not supported\n    # Each database operation must be in its own transaction\n    \n    try:\n        # Migrate data from default to analytics database\n        with transaction.atomic(using='default'):\n            posts_data = list(Post.objects.using('default').values(\n                'id', 'title', 'view_count', 'created_at'\n            ))\n        \n        # Insert into analytics database\n        with transaction.atomic(using='analytics'):\n            # Assuming we have an AnalyticsPost model in analytics DB\n            for post_data in posts_data:\n                # Insert logic here\n                pass\n    \n    except Exception as e:\n        print(f\"Cross-database migration failed: {e}\")\n        # Manual cleanup may be required\n        raise\n\n# Distributed transaction simulation\ndef simulate_distributed_transaction(apps, schema_editor):\n    \"\"\"Simulate distributed transaction with manual coordination\"\"\"\n    \n    from django.db import connections, transaction\n    \n    databases = ['default', 'analytics', 'cache']\n    operations_log = []\n    \n    try:\n        # Phase 1: Prepare all operations\n        for db_alias in databases:\n            with transaction.atomic(using=db_alias):\n                # Prepare operation on each database\n                savepoint = transaction.savepoint(using=db_alias)\n                \n                # Perform operation\n                # ... database-specific operations ...\n                \n                operations_log.append({\n                    'database': db_alias,\n                    'savepoint': savepoint,\n                    'status': 'prepared'\n                })\n        \n        # Phase 2: Commit all operations\n        for operation in operations_log:\n            transaction.savepoint_commit(\n                operation['savepoint'],\n                using=operation['database']\n            )\n            operation['status'] = 'committed'\n    \n    except Exception as e:\n        # Rollback all prepared operations\n        for operation in operations_log:\n            if operation['status'] == 'prepared':\n                transaction.savepoint_rollback(\n                    operation['savepoint'],\n                    using=operation['database']\n                )\n        \n        raise\n\n# Long-running migration with checkpoints\nclass CheckpointMigration(migrations.Migration):\n    \"\"\"Migration with checkpoint system for long operations\"\"\"\n    \n    dependencies = [\n        ('blog', '0007_multi_database'),\n    ]\n    \n    operations = [\n        migrations.RunPython(\n            code=long_running_migration_with_checkpoints,\n            reverse_code=migrations.RunPython.noop,\n        ),\n    ]\n\ndef long_running_migration_with_checkpoints(apps, schema_editor):\n    \"\"\"Long-running migration with checkpoint system\"\"\"\n    \n    from django.core.cache import cache\n    from django.db import transaction\n    \n    Post = apps.get_model('blog', 'Post')\n    \n    checkpoint_key = 'migration_checkpoint_post_processing'\n    batch_size = 1000\n    \n    # Get last checkpoint\n    last_checkpoint = cache.get(checkpoint_key, {'last_id': 0, 'processed': 0})\n    \n    total_posts = Post.objects.filter(id__gt=last_checkpoint['last_id']).count()\n    processed_count = last_checkpoint['processed']\n    \n    print(f\"Resuming migration from ID {last_checkpoint['last_id']}\")\n    print(f\"Already processed: {processed_count} posts\")\n    print(f\"Remaining: {total_posts} posts\")\n    \n    try:\n        posts_queryset = Post.objects.filter(\n            id__gt=last_checkpoint['last_id']\n        ).order_by('id')\n        \n        for i in range(0, total_posts, batch_size):\n            batch = posts_queryset[i:i + batch_size]\n            \n            with transaction.atomic():\n                batch_list = list(batch)\n                \n                for post in batch_list:\n                    # Perform expensive operation\n                    post.search_content = f\"{post.title} {post.content}\"\n                    post.save()\n                \n                # Update checkpoint\n                if batch_list:\n                    last_id = batch_list[-1].id\n                    processed_count += len(batch_list)\n                    \n                    cache.set(checkpoint_key, {\n                        'last_id': last_id,\n                        'processed': processed_count\n                    }, timeout=3600)\n                    \n                    print(f\"Checkpoint: processed {processed_count} posts, last ID: {last_id}\")\n    \n    except Exception as e:\n        print(f\"Migration failed at checkpoint {last_checkpoint}\")\n        print(f\"Error: {e}\")\n        print(\"Migration can be resumed by running again\")\n        raise\n    \n    finally:\n        # Clean up checkpoint on successful completion\n        if processed_count >= total_posts:\n            cache.delete(checkpoint_key)\n            print(\"Migration completed successfully\")\n",[1047,5950,5951,5956,5973,5982,5986,5994,6015,6019,6023,6031,6041,6052,6070,6074,6078,6082,6099,6108,6112,6132,6136,6141,6160,6180,6184,6214,6218,6223,6228,6232,6239,6244,6269,6306,6339,6344,6348,6353,6377,6382,6396,6401,6406,6410,6423,6445,6450,6455,6459,6464,6481,6490,6494,6512,6516,6551,6560,6564,6570,6575,6589,6610,6615,6638,6642,6647,6652,6656,6668,6685,6700,6717,6722,6726,6731,6745,6755,6771,6791,6795,6819,6823,6835,6840,6852,6880,6890,6905,6924,6928,6932,6936,6940,6945,6962,6971,6975,6983,7004,7008,7012,7020,7030,7041,7059,7063,7067,7071,7088,7097,7101,7119,7133,7137,7167,7171,7185,7193,7197,7202,7251,7255,7296,7316,7320,7352,7374,7395,7399,7405,7424,7443,7460,7464,7488,7512,7516,7528,7543,7547,7561,7566,7603,7613,7617,7622,7630,7651,7668,7673,7690,7706,7719,7732,7736,7766,7770,7782,7803,7824,7839,7843,7847,7854,7859,7873,7887],{"__ignoreMap":1045},[1050,5952,5953],{"class":1052,"line":1053},[1050,5954,5955],{"class":1056},"# Handling multiple databases in migrations\n",[1050,5957,5958,5960,5963,5965,5967,5969,5971],{"class":1052,"line":1060},[1050,5959,1064],{"class":1063},[1050,5961,5962],{"class":1067}," MultiDatabaseMigration",[1050,5964,1072],{"class":1071},[1050,5966,1076],{"class":1075},[1050,5968,1079],{"class":1071},[1050,5970,1082],{"class":1075},[1050,5972,1085],{"class":1071},[1050,5974,5975,5977,5980],{"class":1052,"line":1088},[1050,5976,1092],{"class":1091},[1050,5978,5979],{"class":1095},"Migration that works with multiple databases",[1050,5981,1099],{"class":1091},[1050,5983,5984],{"class":1052,"line":1102},[1050,5985,1106],{"class":1105},[1050,5987,5988,5990,5992],{"class":1052,"line":1109},[1050,5989,1112],{"class":1105},[1050,5991,1115],{"class":1071},[1050,5993,1118],{"class":1071},[1050,5995,5996,5998,6000,6002,6004,6006,6008,6011,6013],{"class":1052,"line":1121},[1050,5997,1124],{"class":1071},[1050,5999,1128],{"class":1127},[1050,6001,1132],{"class":1131},[1050,6003,1128],{"class":1127},[1050,6005,1137],{"class":1071},[1050,6007,1140],{"class":1127},[1050,6009,6010],{"class":1131},"0006_conditional_transaction",[1050,6012,1128],{"class":1127},[1050,6014,1148],{"class":1071},[1050,6016,6017],{"class":1052,"line":1151},[1050,6018,1154],{"class":1071},[1050,6020,6021],{"class":1052,"line":1157},[1050,6022,1106],{"class":1105},[1050,6024,6025,6027,6029],{"class":1052,"line":1162},[1050,6026,1188],{"class":1105},[1050,6028,1115],{"class":1071},[1050,6030,1118],{"class":1071},[1050,6032,6033,6035,6037,6039],{"class":1052,"line":1168},[1050,6034,1198],{"class":1105},[1050,6036,1079],{"class":1071},[1050,6038,2068],{"class":1203},[1050,6040,1207],{"class":1071},[1050,6042,6043,6045,6047,6050],{"class":1052,"line":1180},[1050,6044,2075],{"class":1213},[1050,6046,1115],{"class":1071},[1050,6048,6049],{"class":1203},"migrate_across_databases",[1050,6051,1226],{"class":1071},[1050,6053,6054,6056,6058,6060,6062,6064,6066,6068],{"class":1052,"line":1185},[1050,6055,2087],{"class":1213},[1050,6057,1115],{"class":1071},[1050,6059,1076],{"class":1203},[1050,6061,1079],{"class":1071},[1050,6063,2068],{"class":1729},[1050,6065,1079],{"class":1071},[1050,6067,2100],{"class":1729},[1050,6069,1226],{"class":1071},[1050,6071,6072],{"class":1052,"line":1195},[1050,6073,1278],{"class":1071},[1050,6075,6076],{"class":1052,"line":1210},[1050,6077,1154],{"class":1071},[1050,6079,6080],{"class":1052,"line":1229},[1050,6081,1366],{"emptyLinePlaceholder":1365},[1050,6083,6084,6086,6089,6091,6093,6095,6097],{"class":1052,"line":1246},[1050,6085,2119],{"class":1063},[1050,6087,6088],{"class":2122}," migrate_across_databases",[1050,6090,1072],{"class":1071},[1050,6092,2128],{"class":1644},[1050,6094,1137],{"class":1071},[1050,6096,2133],{"class":1644},[1050,6098,1085],{"class":1071},[1050,6100,6101,6103,6106],{"class":1052,"line":1275},[1050,6102,1092],{"class":1091},[1050,6104,6105],{"class":1095},"Migrate data across multiple databases",[1050,6107,1099],{"class":1091},[1050,6109,6110],{"class":1052,"line":1281},[1050,6111,1106],{"class":1105},[1050,6113,6114,6117,6119,6121,6123,6125,6128,6130],{"class":1052,"line":1292},[1050,6115,6116],{"class":1695},"    from",[1050,6118,1699],{"class":1105},[1050,6120,1079],{"class":1071},[1050,6122,1704],{"class":1105},[1050,6124,1707],{"class":1695},[1050,6126,6127],{"class":1105}," connections",[1050,6129,1137],{"class":1071},[1050,6131,1963],{"class":1105},[1050,6133,6134],{"class":1052,"line":1307},[1050,6135,1106],{"class":1105},[1050,6137,6138],{"class":1052,"line":1323},[1050,6139,6140],{"class":1056},"    # Get database connections\n",[1050,6142,6143,6146,6148,6150,6152,6154,6156,6158],{"class":1052,"line":1346},[1050,6144,6145],{"class":1105},"    default_db ",[1050,6147,1115],{"class":1071},[1050,6149,6127],{"class":1105},[1050,6151,4253],{"class":1071},[1050,6153,1128],{"class":1127},[1050,6155,1264],{"class":1131},[1050,6157,1128],{"class":1127},[1050,6159,2313],{"class":1071},[1050,6161,6162,6165,6167,6169,6171,6173,6176,6178],{"class":1052,"line":1351},[1050,6163,6164],{"class":1105},"    analytics_db ",[1050,6166,1115],{"class":1071},[1050,6168,6127],{"class":1105},[1050,6170,4253],{"class":1071},[1050,6172,1128],{"class":1127},[1050,6174,6175],{"class":1131},"analytics",[1050,6177,1128],{"class":1127},[1050,6179,2313],{"class":1071},[1050,6181,6182],{"class":1052,"line":1357},[1050,6183,1106],{"class":1105},[1050,6185,6186,6188,6190,6192,6194,6196,6198,6200,6202,6204,6206,6208,6210,6212],{"class":1052,"line":1362},[1050,6187,2153],{"class":1105},[1050,6189,1115],{"class":1071},[1050,6191,2158],{"class":1105},[1050,6193,1079],{"class":1071},[1050,6195,2163],{"class":1203},[1050,6197,1072],{"class":1071},[1050,6199,1128],{"class":1127},[1050,6201,1132],{"class":1131},[1050,6203,1128],{"class":1127},[1050,6205,1137],{"class":1071},[1050,6207,1140],{"class":1127},[1050,6209,2178],{"class":1131},[1050,6211,1128],{"class":1127},[1050,6213,1677],{"class":1071},[1050,6215,6216],{"class":1052,"line":1369},[1050,6217,1106],{"class":1105},[1050,6219,6220],{"class":1052,"line":1375},[1050,6221,6222],{"class":1056},"    # Note: Cross-database transactions are not supported\n",[1050,6224,6225],{"class":1052,"line":1392},[1050,6226,6227],{"class":1056},"    # Each database operation must be in its own transaction\n",[1050,6229,6230],{"class":1052,"line":1402},[1050,6231,1106],{"class":1105},[1050,6233,6234,6237],{"class":1052,"line":1407},[1050,6235,6236],{"class":1695},"    try",[1050,6238,1744],{"class":1071},[1050,6240,6241],{"class":1052,"line":1416},[1050,6242,6243],{"class":1056},"        # Migrate data from default to analytics database\n",[1050,6245,6246,6248,6250,6252,6254,6256,6259,6261,6263,6265,6267],{"class":1052,"line":1438},[1050,6247,2259],{"class":1695},[1050,6249,2262],{"class":1105},[1050,6251,1079],{"class":1071},[1050,6253,1762],{"class":1203},[1050,6255,1072],{"class":1071},[1050,6257,6258],{"class":1213},"using",[1050,6260,1115],{"class":1071},[1050,6262,1128],{"class":1127},[1050,6264,1264],{"class":1131},[1050,6266,1128],{"class":1127},[1050,6268,1085],{"class":1071},[1050,6270,6271,6274,6276,6279,6281,6283,6285,6287,6289,6291,6293,6295,6297,6299,6301,6304],{"class":1052,"line":1443},[1050,6272,6273],{"class":1105},"            posts_data ",[1050,6275,1115],{"class":1071},[1050,6277,6278],{"class":1658}," list",[1050,6280,1072],{"class":1071},[1050,6282,2178],{"class":1203},[1050,6284,1079],{"class":1071},[1050,6286,2216],{"class":1729},[1050,6288,1079],{"class":1071},[1050,6290,6258],{"class":1203},[1050,6292,1072],{"class":1071},[1050,6294,1128],{"class":1127},[1050,6296,1264],{"class":1131},[1050,6298,1128],{"class":1127},[1050,6300,4612],{"class":1071},[1050,6302,6303],{"class":1203},"values",[1050,6305,1207],{"class":1071},[1050,6307,6308,6311,6313,6315,6317,6319,6321,6323,6325,6327,6329,6331,6333,6335,6337],{"class":1052,"line":1448},[1050,6309,6310],{"class":1127},"                '",[1050,6312,3439],{"class":1131},[1050,6314,1128],{"class":1127},[1050,6316,1137],{"class":1071},[1050,6318,1140],{"class":1127},[1050,6320,2380],{"class":1131},[1050,6322,1128],{"class":1127},[1050,6324,1137],{"class":1071},[1050,6326,1140],{"class":1127},[1050,6328,1239],{"class":1131},[1050,6330,1128],{"class":1127},[1050,6332,1137],{"class":1071},[1050,6334,1140],{"class":1127},[1050,6336,1905],{"class":1131},[1050,6338,4096],{"class":1127},[1050,6340,6341],{"class":1052,"line":1454},[1050,6342,6343],{"class":1071},"            ))\n",[1050,6345,6346],{"class":1052,"line":1464},[1050,6347,1683],{"class":1105},[1050,6349,6350],{"class":1052,"line":1469},[1050,6351,6352],{"class":1056},"        # Insert into analytics database\n",[1050,6354,6355,6357,6359,6361,6363,6365,6367,6369,6371,6373,6375],{"class":1052,"line":1478},[1050,6356,2259],{"class":1695},[1050,6358,2262],{"class":1105},[1050,6360,1079],{"class":1071},[1050,6362,1762],{"class":1203},[1050,6364,1072],{"class":1071},[1050,6366,6258],{"class":1213},[1050,6368,1115],{"class":1071},[1050,6370,1128],{"class":1127},[1050,6372,6175],{"class":1131},[1050,6374,1128],{"class":1127},[1050,6376,1085],{"class":1071},[1050,6378,6379],{"class":1052,"line":1484},[1050,6380,6381],{"class":1056},"            # Assuming we have an AnalyticsPost model in analytics DB\n",[1050,6383,6384,6386,6389,6391,6394],{"class":1052,"line":1496},[1050,6385,2323],{"class":1695},[1050,6387,6388],{"class":1105}," post_data ",[1050,6390,2329],{"class":1695},[1050,6392,6393],{"class":1105}," posts_data",[1050,6395,1744],{"class":1071},[1050,6397,6398],{"class":1052,"line":1514},[1050,6399,6400],{"class":1056},"                # Insert logic here\n",[1050,6402,6403],{"class":1052,"line":1531},[1050,6404,6405],{"class":1695},"                pass\n",[1050,6407,6408],{"class":1052,"line":1536},[1050,6409,1106],{"class":1105},[1050,6411,6412,6415,6417,6419,6421],{"class":1052,"line":1541},[1050,6413,6414],{"class":1695},"    except",[1050,6416,2744],{"class":1658},[1050,6418,2747],{"class":1695},[1050,6420,2750],{"class":1105},[1050,6422,1744],{"class":1071},[1050,6424,6425,6428,6430,6432,6435,6437,6439,6441,6443],{"class":1052,"line":1546},[1050,6426,6427],{"class":1632},"        print",[1050,6429,1072],{"class":1071},[1050,6431,2418],{"class":1063},[1050,6433,6434],{"class":1131},"\"Cross-database migration failed: ",[1050,6436,2425],{"class":2424},[1050,6438,2788],{"class":1203},[1050,6440,2430],{"class":2424},[1050,6442,1504],{"class":1131},[1050,6444,1677],{"class":1071},[1050,6446,6447],{"class":1052,"line":1552},[1050,6448,6449],{"class":1056},"        # Manual cleanup may be required\n",[1050,6451,6452],{"class":1052,"line":1570},[1050,6453,6454],{"class":1695},"        raise\n",[1050,6456,6457],{"class":1052,"line":1580},[1050,6458,1366],{"emptyLinePlaceholder":1365},[1050,6460,6461],{"class":1052,"line":1585},[1050,6462,6463],{"class":1056},"# Distributed transaction simulation\n",[1050,6465,6466,6468,6471,6473,6475,6477,6479],{"class":1052,"line":1594},[1050,6467,2119],{"class":1063},[1050,6469,6470],{"class":2122}," simulate_distributed_transaction",[1050,6472,1072],{"class":1071},[1050,6474,2128],{"class":1644},[1050,6476,1137],{"class":1071},[1050,6478,2133],{"class":1644},[1050,6480,1085],{"class":1071},[1050,6482,6483,6485,6488],{"class":1052,"line":1616},[1050,6484,1092],{"class":1091},[1050,6486,6487],{"class":1095},"Simulate distributed transaction with manual coordination",[1050,6489,1099],{"class":1091},[1050,6491,6492],{"class":1052,"line":1621},[1050,6493,1106],{"class":1105},[1050,6495,6496,6498,6500,6502,6504,6506,6508,6510],{"class":1052,"line":1626},[1050,6497,6116],{"class":1695},[1050,6499,1699],{"class":1105},[1050,6501,1079],{"class":1071},[1050,6503,1704],{"class":1105},[1050,6505,1707],{"class":1695},[1050,6507,6127],{"class":1105},[1050,6509,1137],{"class":1071},[1050,6511,1963],{"class":1105},[1050,6513,6514],{"class":1052,"line":1655},[1050,6515,1106],{"class":1105},[1050,6517,6518,6521,6523,6526,6528,6530,6532,6534,6536,6538,6540,6542,6544,6547,6549],{"class":1052,"line":1680},[1050,6519,6520],{"class":1105},"    databases ",[1050,6522,1115],{"class":1071},[1050,6524,6525],{"class":1071}," [",[1050,6527,1128],{"class":1127},[1050,6529,1264],{"class":1131},[1050,6531,1128],{"class":1127},[1050,6533,1137],{"class":1071},[1050,6535,1140],{"class":1127},[1050,6537,6175],{"class":1131},[1050,6539,1128],{"class":1127},[1050,6541,1137],{"class":1071},[1050,6543,1140],{"class":1127},[1050,6545,6546],{"class":1131},"cache",[1050,6548,1128],{"class":1127},[1050,6550,2313],{"class":1071},[1050,6552,6553,6556,6558],{"class":1052,"line":1686},[1050,6554,6555],{"class":1105},"    operations_log ",[1050,6557,1115],{"class":1071},[1050,6559,4971],{"class":1071},[1050,6561,6562],{"class":1052,"line":1692},[1050,6563,1106],{"class":1105},[1050,6565,6566,6568],{"class":1052,"line":1713},[1050,6567,6236],{"class":1695},[1050,6569,1744],{"class":1071},[1050,6571,6572],{"class":1052,"line":1718},[1050,6573,6574],{"class":1056},"        # Phase 1: Prepare all operations\n",[1050,6576,6577,6579,6582,6584,6587],{"class":1052,"line":1747},[1050,6578,3698],{"class":1695},[1050,6580,6581],{"class":1105}," db_alias ",[1050,6583,2329],{"class":1695},[1050,6585,6586],{"class":1105}," databases",[1050,6588,1744],{"class":1071},[1050,6590,6591,6593,6595,6597,6599,6601,6603,6605,6608],{"class":1052,"line":1753},[1050,6592,3361],{"class":1695},[1050,6594,2262],{"class":1105},[1050,6596,1079],{"class":1071},[1050,6598,1762],{"class":1203},[1050,6600,1072],{"class":1071},[1050,6602,6258],{"class":1213},[1050,6604,1115],{"class":1071},[1050,6606,6607],{"class":1203},"db_alias",[1050,6609,1085],{"class":1071},[1050,6611,6612],{"class":1052,"line":1770},[1050,6613,6614],{"class":1056},"                # Prepare operation on each database\n",[1050,6616,6617,6620,6622,6624,6626,6628,6630,6632,6634,6636],{"class":1052,"line":1793},[1050,6618,6619],{"class":1105},"                savepoint ",[1050,6621,1115],{"class":1071},[1050,6623,2262],{"class":1105},[1050,6625,1079],{"class":1071},[1050,6627,2582],{"class":1203},[1050,6629,1072],{"class":1071},[1050,6631,6258],{"class":1213},[1050,6633,1115],{"class":1071},[1050,6635,6607],{"class":1203},[1050,6637,1677],{"class":1071},[1050,6639,6640],{"class":1052,"line":1799},[1050,6641,3407],{"class":1105},[1050,6643,6644],{"class":1052,"line":1812},[1050,6645,6646],{"class":1056},"                # Perform operation\n",[1050,6648,6649],{"class":1052,"line":1820},[1050,6650,6651],{"class":1056},"                # ... database-specific operations ...\n",[1050,6653,6654],{"class":1052,"line":1826},[1050,6655,3407],{"class":1105},[1050,6657,6658,6661,6663,6665],{"class":1052,"line":1839},[1050,6659,6660],{"class":1105},"                operations_log",[1050,6662,1079],{"class":1071},[1050,6664,5013],{"class":1203},[1050,6666,6667],{"class":1071},"({\n",[1050,6669,6670,6673,6676,6678,6680,6683],{"class":1052,"line":1844},[1050,6671,6672],{"class":1127},"                    '",[1050,6674,6675],{"class":1131},"database",[1050,6677,1128],{"class":1127},[1050,6679,2301],{"class":1071},[1050,6681,6682],{"class":1203}," db_alias",[1050,6684,1226],{"class":1071},[1050,6686,6687,6689,6691,6693,6695,6698],{"class":1052,"line":1853},[1050,6688,6672],{"class":1127},[1050,6690,2582],{"class":1131},[1050,6692,1128],{"class":1127},[1050,6694,2301],{"class":1071},[1050,6696,6697],{"class":1203}," savepoint",[1050,6699,1226],{"class":1071},[1050,6701,6702,6704,6706,6708,6710,6712,6715],{"class":1052,"line":1865},[1050,6703,6672],{"class":1127},[1050,6705,4600],{"class":1131},[1050,6707,1128],{"class":1127},[1050,6709,2301],{"class":1071},[1050,6711,1140],{"class":1127},[1050,6713,6714],{"class":1131},"prepared",[1050,6716,4096],{"class":1127},[1050,6718,6719],{"class":1052,"line":1880},[1050,6720,6721],{"class":1071},"                })\n",[1050,6723,6724],{"class":1052,"line":1926},[1050,6725,1683],{"class":1105},[1050,6727,6728],{"class":1052,"line":1931},[1050,6729,6730],{"class":1056},"        # Phase 2: Commit all operations\n",[1050,6732,6733,6735,6738,6740,6743],{"class":1052,"line":2802},[1050,6734,3698],{"class":1695},[1050,6736,6737],{"class":1105}," operation ",[1050,6739,2329],{"class":1695},[1050,6741,6742],{"class":1105}," operations_log",[1050,6744,1744],{"class":1071},[1050,6746,6747,6749,6751,6753],{"class":1052,"line":2807},[1050,6748,2721],{"class":1105},[1050,6750,1079],{"class":1071},[1050,6752,2726],{"class":1203},[1050,6754,1207],{"class":1071},[1050,6756,6757,6760,6762,6764,6766,6768],{"class":1052,"line":2813},[1050,6758,6759],{"class":1203},"                operation",[1050,6761,4253],{"class":1071},[1050,6763,1128],{"class":1127},[1050,6765,2582],{"class":1131},[1050,6767,1128],{"class":1127},[1050,6769,6770],{"class":1071},"],\n",[1050,6772,6773,6776,6778,6781,6783,6785,6787,6789],{"class":1052,"line":2831},[1050,6774,6775],{"class":1213},"                using",[1050,6777,1115],{"class":1071},[1050,6779,6780],{"class":1203},"operation",[1050,6782,4253],{"class":1071},[1050,6784,1128],{"class":1127},[1050,6786,6675],{"class":1131},[1050,6788,1128],{"class":1127},[1050,6790,2313],{"class":1071},[1050,6792,6793],{"class":1052,"line":2841},[1050,6794,5067],{"class":1071},[1050,6796,6797,6800,6802,6804,6806,6808,6810,6812,6814,6817],{"class":1052,"line":2846},[1050,6798,6799],{"class":1105},"            operation",[1050,6801,4253],{"class":1071},[1050,6803,1128],{"class":1127},[1050,6805,4600],{"class":1131},[1050,6807,1128],{"class":1127},[1050,6809,5588],{"class":1071},[1050,6811,1765],{"class":1071},[1050,6813,1140],{"class":1127},[1050,6815,6816],{"class":1131},"committed",[1050,6818,4096],{"class":1127},[1050,6820,6821],{"class":1052,"line":2855},[1050,6822,1106],{"class":1105},[1050,6824,6825,6827,6829,6831,6833],{"class":1052,"line":2877},[1050,6826,6414],{"class":1695},[1050,6828,2744],{"class":1658},[1050,6830,2747],{"class":1695},[1050,6832,2750],{"class":1105},[1050,6834,1744],{"class":1071},[1050,6836,6837],{"class":1052,"line":2882},[1050,6838,6839],{"class":1056},"        # Rollback all prepared operations\n",[1050,6841,6842,6844,6846,6848,6850],{"class":1052,"line":2887},[1050,6843,3698],{"class":1695},[1050,6845,6737],{"class":1105},[1050,6847,2329],{"class":1695},[1050,6849,6742],{"class":1105},[1050,6851,1744],{"class":1071},[1050,6853,6854,6857,6860,6862,6864,6866,6868,6870,6872,6874,6876,6878],{"class":1052,"line":2908},[1050,6855,6856],{"class":1695},"            if",[1050,6858,6859],{"class":1105}," operation",[1050,6861,4253],{"class":1071},[1050,6863,1128],{"class":1127},[1050,6865,4600],{"class":1131},[1050,6867,1128],{"class":1127},[1050,6869,5588],{"class":1071},[1050,6871,1734],{"class":1733},[1050,6873,1140],{"class":1127},[1050,6875,6714],{"class":1131},[1050,6877,1128],{"class":1127},[1050,6879,1744],{"class":1071},[1050,6881,6882,6884,6886,6888],{"class":1052,"line":2927},[1050,6883,4799],{"class":1105},[1050,6885,1079],{"class":1071},[1050,6887,2766],{"class":1203},[1050,6889,1207],{"class":1071},[1050,6891,6892,6895,6897,6899,6901,6903],{"class":1052,"line":2932},[1050,6893,6894],{"class":1203},"                    operation",[1050,6896,4253],{"class":1071},[1050,6898,1128],{"class":1127},[1050,6900,2582],{"class":1131},[1050,6902,1128],{"class":1127},[1050,6904,6770],{"class":1071},[1050,6906,6907,6910,6912,6914,6916,6918,6920,6922],{"class":1052,"line":2938},[1050,6908,6909],{"class":1213},"                    using",[1050,6911,1115],{"class":1071},[1050,6913,6780],{"class":1203},[1050,6915,4253],{"class":1071},[1050,6917,1128],{"class":1127},[1050,6919,6675],{"class":1131},[1050,6921,1128],{"class":1127},[1050,6923,2313],{"class":1071},[1050,6925,6926],{"class":1052,"line":2953},[1050,6927,4654],{"class":1071},[1050,6929,6930],{"class":1052,"line":2958},[1050,6931,1683],{"class":1105},[1050,6933,6934],{"class":1052,"line":2980},[1050,6935,6454],{"class":1695},[1050,6937,6938],{"class":1052,"line":3002},[1050,6939,1366],{"emptyLinePlaceholder":1365},[1050,6941,6942],{"class":1052,"line":3023},[1050,6943,6944],{"class":1056},"# Long-running migration with checkpoints\n",[1050,6946,6947,6949,6952,6954,6956,6958,6960],{"class":1052,"line":3028},[1050,6948,1064],{"class":1063},[1050,6950,6951],{"class":1067}," CheckpointMigration",[1050,6953,1072],{"class":1071},[1050,6955,1076],{"class":1075},[1050,6957,1079],{"class":1071},[1050,6959,1082],{"class":1075},[1050,6961,1085],{"class":1071},[1050,6963,6964,6966,6969],{"class":1052,"line":3034},[1050,6965,1092],{"class":1091},[1050,6967,6968],{"class":1095},"Migration with checkpoint system for long operations",[1050,6970,1099],{"class":1091},[1050,6972,6973],{"class":1052,"line":3053},[1050,6974,1106],{"class":1105},[1050,6976,6977,6979,6981],{"class":1052,"line":3058},[1050,6978,1112],{"class":1105},[1050,6980,1115],{"class":1071},[1050,6982,1118],{"class":1071},[1050,6984,6985,6987,6989,6991,6993,6995,6997,7000,7002],{"class":1052,"line":3067},[1050,6986,1124],{"class":1071},[1050,6988,1128],{"class":1127},[1050,6990,1132],{"class":1131},[1050,6992,1128],{"class":1127},[1050,6994,1137],{"class":1071},[1050,6996,1140],{"class":1127},[1050,6998,6999],{"class":1131},"0007_multi_database",[1050,7001,1128],{"class":1127},[1050,7003,1148],{"class":1071},[1050,7005,7006],{"class":1052,"line":3078},[1050,7007,1154],{"class":1071},[1050,7009,7010],{"class":1052,"line":3090},[1050,7011,1106],{"class":1105},[1050,7013,7014,7016,7018],{"class":1052,"line":3109},[1050,7015,1188],{"class":1105},[1050,7017,1115],{"class":1071},[1050,7019,1118],{"class":1071},[1050,7021,7022,7024,7026,7028],{"class":1052,"line":3114},[1050,7023,1198],{"class":1105},[1050,7025,1079],{"class":1071},[1050,7027,2068],{"class":1203},[1050,7029,1207],{"class":1071},[1050,7031,7032,7034,7036,7039],{"class":1052,"line":3119},[1050,7033,2075],{"class":1213},[1050,7035,1115],{"class":1071},[1050,7037,7038],{"class":1203},"long_running_migration_with_checkpoints",[1050,7040,1226],{"class":1071},[1050,7042,7043,7045,7047,7049,7051,7053,7055,7057],{"class":1052,"line":3124},[1050,7044,2087],{"class":1213},[1050,7046,1115],{"class":1071},[1050,7048,1076],{"class":1203},[1050,7050,1079],{"class":1071},[1050,7052,2068],{"class":1729},[1050,7054,1079],{"class":1071},[1050,7056,2100],{"class":1729},[1050,7058,1226],{"class":1071},[1050,7060,7061],{"class":1052,"line":3142},[1050,7062,1278],{"class":1071},[1050,7064,7065],{"class":1052,"line":3152},[1050,7066,1154],{"class":1071},[1050,7068,7069],{"class":1052,"line":3157},[1050,7070,1366],{"emptyLinePlaceholder":1365},[1050,7072,7073,7075,7078,7080,7082,7084,7086],{"class":1052,"line":3188},[1050,7074,2119],{"class":1063},[1050,7076,7077],{"class":2122}," long_running_migration_with_checkpoints",[1050,7079,1072],{"class":1071},[1050,7081,2128],{"class":1644},[1050,7083,1137],{"class":1071},[1050,7085,2133],{"class":1644},[1050,7087,1085],{"class":1071},[1050,7089,7090,7092,7095],{"class":1052,"line":3207},[1050,7091,1092],{"class":1091},[1050,7093,7094],{"class":1095},"Long-running migration with checkpoint system",[1050,7096,1099],{"class":1091},[1050,7098,7099],{"class":1052,"line":3212},[1050,7100,1106],{"class":1105},[1050,7102,7103,7105,7107,7109,7111,7113,7115,7117],{"class":1052,"line":3228},[1050,7104,6116],{"class":1695},[1050,7106,1699],{"class":1105},[1050,7108,1079],{"class":1071},[1050,7110,4067],{"class":1105},[1050,7112,1079],{"class":1071},[1050,7114,4072],{"class":1105},[1050,7116,1707],{"class":1695},[1050,7118,4077],{"class":1105},[1050,7120,7121,7123,7125,7127,7129,7131],{"class":1052,"line":3234},[1050,7122,6116],{"class":1695},[1050,7124,1699],{"class":1105},[1050,7126,1079],{"class":1071},[1050,7128,1704],{"class":1105},[1050,7130,1707],{"class":1695},[1050,7132,1963],{"class":1105},[1050,7134,7135],{"class":1052,"line":3247},[1050,7136,1106],{"class":1105},[1050,7138,7139,7141,7143,7145,7147,7149,7151,7153,7155,7157,7159,7161,7163,7165],{"class":1052,"line":3268},[1050,7140,2153],{"class":1105},[1050,7142,1115],{"class":1071},[1050,7144,2158],{"class":1105},[1050,7146,1079],{"class":1071},[1050,7148,2163],{"class":1203},[1050,7150,1072],{"class":1071},[1050,7152,1128],{"class":1127},[1050,7154,1132],{"class":1131},[1050,7156,1128],{"class":1127},[1050,7158,1137],{"class":1071},[1050,7160,1140],{"class":1127},[1050,7162,2178],{"class":1131},[1050,7164,1128],{"class":1127},[1050,7166,1677],{"class":1071},[1050,7168,7169],{"class":1052,"line":3288},[1050,7170,1106],{"class":1105},[1050,7172,7173,7176,7178,7180,7183],{"class":1052,"line":3299},[1050,7174,7175],{"class":1105},"    checkpoint_key ",[1050,7177,1115],{"class":1071},[1050,7179,1140],{"class":1127},[1050,7181,7182],{"class":1131},"migration_checkpoint_post_processing",[1050,7184,4096],{"class":1127},[1050,7186,7187,7189,7191],{"class":1052,"line":3304},[1050,7188,2196],{"class":1105},[1050,7190,1115],{"class":1071},[1050,7192,2201],{"class":1269},[1050,7194,7195],{"class":1052,"line":3312},[1050,7196,1106],{"class":1105},[1050,7198,7199],{"class":1052,"line":3318},[1050,7200,7201],{"class":1056},"    # Get last checkpoint\n",[1050,7203,7204,7207,7209,7211,7213,7215,7217,7220,7222,7225,7227,7230,7232,7234,7236,7238,7240,7242,7244,7246,7248],{"class":1052,"line":3329},[1050,7205,7206],{"class":1105},"    last_checkpoint ",[1050,7208,1115],{"class":1071},[1050,7210,4106],{"class":1105},[1050,7212,1079],{"class":1071},[1050,7214,4111],{"class":1203},[1050,7216,1072],{"class":1071},[1050,7218,7219],{"class":1203},"checkpoint_key",[1050,7221,1137],{"class":1071},[1050,7223,7224],{"class":1071}," {",[1050,7226,1128],{"class":1127},[1050,7228,7229],{"class":1131},"last_id",[1050,7231,1128],{"class":1127},[1050,7233,2301],{"class":1071},[1050,7235,4121],{"class":1269},[1050,7237,1137],{"class":1071},[1050,7239,1140],{"class":1127},[1050,7241,2298],{"class":1131},[1050,7243,1128],{"class":1127},[1050,7245,2301],{"class":1071},[1050,7247,4121],{"class":1269},[1050,7249,7250],{"class":1071},"})\n",[1050,7252,7253],{"class":1052,"line":3339},[1050,7254,1106],{"class":1105},[1050,7256,7257,7259,7261,7263,7265,7267,7269,7271,7273,7276,7278,7281,7283,7285,7287,7289,7292,7294],{"class":1052,"line":3344},[1050,7258,2206],{"class":1105},[1050,7260,1115],{"class":1071},[1050,7262,2211],{"class":1105},[1050,7264,1079],{"class":1071},[1050,7266,2216],{"class":1729},[1050,7268,1079],{"class":1071},[1050,7270,3422],{"class":1203},[1050,7272,1072],{"class":1071},[1050,7274,7275],{"class":1213},"id__gt",[1050,7277,1115],{"class":1071},[1050,7279,7280],{"class":1203},"last_checkpoint",[1050,7282,4253],{"class":1071},[1050,7284,1128],{"class":1127},[1050,7286,7229],{"class":1131},[1050,7288,1128],{"class":1127},[1050,7290,7291],{"class":1071},"]).",[1050,7293,2221],{"class":1203},[1050,7295,2224],{"class":1071},[1050,7297,7298,7301,7303,7306,7308,7310,7312,7314],{"class":1052,"line":3358},[1050,7299,7300],{"class":1105},"    processed_count ",[1050,7302,1115],{"class":1071},[1050,7304,7305],{"class":1105}," last_checkpoint",[1050,7307,4253],{"class":1071},[1050,7309,1128],{"class":1127},[1050,7311,2298],{"class":1131},[1050,7313,1128],{"class":1127},[1050,7315,2313],{"class":1071},[1050,7317,7318],{"class":1052,"line":3372},[1050,7319,1106],{"class":1105},[1050,7321,7322,7325,7327,7329,7332,7334,7336,7338,7340,7342,7344,7346,7348,7350],{"class":1052,"line":3404},[1050,7323,7324],{"class":1632},"    print",[1050,7326,1072],{"class":1071},[1050,7328,2418],{"class":1063},[1050,7330,7331],{"class":1131},"\"Resuming migration from ID ",[1050,7333,2425],{"class":2424},[1050,7335,7280],{"class":1203},[1050,7337,4253],{"class":1071},[1050,7339,1128],{"class":1127},[1050,7341,7229],{"class":1131},[1050,7343,1128],{"class":1127},[1050,7345,5588],{"class":1071},[1050,7347,2430],{"class":2424},[1050,7349,1504],{"class":1131},[1050,7351,1677],{"class":1071},[1050,7353,7354,7356,7358,7360,7363,7365,7368,7370,7372],{"class":1052,"line":3410},[1050,7355,7324],{"class":1632},[1050,7357,1072],{"class":1071},[1050,7359,2418],{"class":1063},[1050,7361,7362],{"class":1131},"\"Already processed: ",[1050,7364,2425],{"class":2424},[1050,7366,7367],{"class":1203},"processed_count",[1050,7369,2430],{"class":2424},[1050,7371,2443],{"class":1131},[1050,7373,1677],{"class":1071},[1050,7375,7376,7378,7380,7382,7385,7387,7389,7391,7393],{"class":1052,"line":3427},[1050,7377,7324],{"class":1632},[1050,7379,1072],{"class":1071},[1050,7381,2418],{"class":1063},[1050,7383,7384],{"class":1131},"\"Remaining: ",[1050,7386,2425],{"class":2424},[1050,7388,2438],{"class":1203},[1050,7390,2430],{"class":2424},[1050,7392,2443],{"class":1131},[1050,7394,1677],{"class":1071},[1050,7396,7397],{"class":1052,"line":3454},[1050,7398,1106],{"class":1105},[1050,7400,7401,7403],{"class":1052,"line":3483},[1050,7402,6236],{"class":1695},[1050,7404,1744],{"class":1071},[1050,7406,7407,7410,7412,7414,7416,7418,7420,7422],{"class":1052,"line":3488},[1050,7408,7409],{"class":1105},"        posts_queryset ",[1050,7411,1115],{"class":1071},[1050,7413,2211],{"class":1105},[1050,7415,1079],{"class":1071},[1050,7417,2216],{"class":1729},[1050,7419,1079],{"class":1071},[1050,7421,3422],{"class":1203},[1050,7423,1207],{"class":1071},[1050,7425,7426,7429,7431,7433,7435,7437,7439,7441],{"class":1052,"line":3498},[1050,7427,7428],{"class":1213},"            id__gt",[1050,7430,1115],{"class":1071},[1050,7432,7280],{"class":1203},[1050,7434,4253],{"class":1071},[1050,7436,1128],{"class":1127},[1050,7438,7229],{"class":1131},[1050,7440,1128],{"class":1127},[1050,7442,2313],{"class":1071},[1050,7444,7445,7448,7450,7452,7454,7456,7458],{"class":1052,"line":5074},[1050,7446,7447],{"class":1071},"        ).",[1050,7449,4182],{"class":1203},[1050,7451,1072],{"class":1071},[1050,7453,1128],{"class":1127},[1050,7455,3439],{"class":1131},[1050,7457,1128],{"class":1127},[1050,7459,1677],{"class":1071},[1050,7461,7462],{"class":1052,"line":5096},[1050,7463,1683],{"class":1105},[1050,7465,7466,7468,7470,7472,7474,7476,7478,7480,7482,7484,7486],{"class":1052,"line":5107},[1050,7467,3698],{"class":1695},[1050,7469,4217],{"class":1105},[1050,7471,2329],{"class":1695},[1050,7473,3706],{"class":1632},[1050,7475,1072],{"class":1071},[1050,7477,1270],{"class":1269},[1050,7479,1137],{"class":1071},[1050,7481,2252],{"class":1203},[1050,7483,1137],{"class":1071},[1050,7485,2310],{"class":1203},[1050,7487,1085],{"class":1071},[1050,7489,7490,7493,7495,7498,7500,7502,7504,7506,7508,7510],{"class":1052,"line":5118},[1050,7491,7492],{"class":1105},"            batch ",[1050,7494,1115],{"class":1071},[1050,7496,7497],{"class":1105}," posts_queryset",[1050,7499,4253],{"class":1071},[1050,7501,4256],{"class":1105},[1050,7503,2301],{"class":1071},[1050,7505,4261],{"class":1105},[1050,7507,2307],{"class":1733},[1050,7509,2310],{"class":1105},[1050,7511,2313],{"class":1071},[1050,7513,7514],{"class":1052,"line":5134},[1050,7515,2318],{"class":1105},[1050,7517,7518,7520,7522,7524,7526],{"class":1052,"line":5150},[1050,7519,3361],{"class":1695},[1050,7521,2262],{"class":1105},[1050,7523,1079],{"class":1071},[1050,7525,1762],{"class":1203},[1050,7527,2269],{"class":1071},[1050,7529,7530,7533,7535,7537,7539,7541],{"class":1052,"line":5155},[1050,7531,7532],{"class":1105},"                batch_list ",[1050,7534,1115],{"class":1071},[1050,7536,6278],{"class":1658},[1050,7538,1072],{"class":1071},[1050,7540,4392],{"class":1203},[1050,7542,1677],{"class":1071},[1050,7544,7545],{"class":1052,"line":5160},[1050,7546,3407],{"class":1105},[1050,7548,7549,7552,7554,7556,7559],{"class":1052,"line":5165},[1050,7550,7551],{"class":1695},"                for",[1050,7553,2326],{"class":1105},[1050,7555,2329],{"class":1695},[1050,7557,7558],{"class":1105}," batch_list",[1050,7560,1744],{"class":1071},[1050,7562,7563],{"class":1052,"line":5171},[1050,7564,7565],{"class":1056},"                    # Perform expensive operation\n",[1050,7567,7568,7570,7572,7575,7577,7579,7581,7583,7585,7587,7589,7591,7593,7595,7597,7599,7601],{"class":1052,"line":5185},[1050,7569,2362],{"class":1105},[1050,7571,1079],{"class":1071},[1050,7573,7574],{"class":1729},"search_content",[1050,7576,1765],{"class":1071},[1050,7578,5179],{"class":1063},[1050,7580,1504],{"class":1131},[1050,7582,2425],{"class":2424},[1050,7584,1221],{"class":1105},[1050,7586,1079],{"class":1071},[1050,7588,2380],{"class":1729},[1050,7590,2430],{"class":2424},[1050,7592,7224],{"class":2424},[1050,7594,1221],{"class":1105},[1050,7596,1079],{"class":1071},[1050,7598,3789],{"class":1729},[1050,7600,2430],{"class":2424},[1050,7602,5566],{"class":1131},[1050,7604,7605,7607,7609,7611],{"class":1052,"line":5191},[1050,7606,2362],{"class":1105},[1050,7608,1079],{"class":1071},[1050,7610,2391],{"class":1203},[1050,7612,2224],{"class":1071},[1050,7614,7615],{"class":1052,"line":5196},[1050,7616,3407],{"class":1105},[1050,7618,7619],{"class":1052,"line":5202},[1050,7620,7621],{"class":1056},"                # Update checkpoint\n",[1050,7623,7624,7626,7628],{"class":1052,"line":5216},[1050,7625,2344],{"class":1695},[1050,7627,7558],{"class":1105},[1050,7629,1744],{"class":1071},[1050,7631,7632,7635,7637,7639,7641,7643,7646,7648],{"class":1052,"line":5221},[1050,7633,7634],{"class":1105},"                    last_id ",[1050,7636,1115],{"class":1071},[1050,7638,7558],{"class":1105},[1050,7640,4253],{"class":1071},[1050,7642,3850],{"class":1733},[1050,7644,7645],{"class":1269},"1",[1050,7647,5524],{"class":1071},[1050,7649,7650],{"class":1729},"id\n",[1050,7652,7653,7656,7658,7661,7663,7666],{"class":1052,"line":5227},[1050,7654,7655],{"class":1105},"                    processed_count ",[1050,7657,2405],{"class":1071},[1050,7659,7660],{"class":1632}," len",[1050,7662,1072],{"class":1071},[1050,7664,7665],{"class":1203},"batch_list",[1050,7667,1677],{"class":1071},[1050,7669,7670],{"class":1052,"line":5233},[1050,7671,7672],{"class":1105},"                    \n",[1050,7674,7675,7678,7680,7682,7684,7686,7688],{"class":1052,"line":5238},[1050,7676,7677],{"class":1105},"                    cache",[1050,7679,1079],{"class":1071},[1050,7681,4348],{"class":1203},[1050,7683,1072],{"class":1071},[1050,7685,7219],{"class":1203},[1050,7687,1137],{"class":1071},[1050,7689,5331],{"class":1071},[1050,7691,7692,7695,7697,7699,7701,7704],{"class":1052,"line":5243},[1050,7693,7694],{"class":1127},"                        '",[1050,7696,7229],{"class":1131},[1050,7698,1128],{"class":1127},[1050,7700,2301],{"class":1071},[1050,7702,7703],{"class":1203}," last_id",[1050,7705,1226],{"class":1071},[1050,7707,7708,7710,7712,7714,7716],{"class":1052,"line":5257},[1050,7709,7694],{"class":1127},[1050,7711,2298],{"class":1131},[1050,7713,1128],{"class":1127},[1050,7715,2301],{"class":1071},[1050,7717,7718],{"class":1203}," processed_count\n",[1050,7720,7721,7724,7726,7728,7730],{"class":1052,"line":5262},[1050,7722,7723],{"class":1071},"                    },",[1050,7725,4365],{"class":1213},[1050,7727,1115],{"class":1071},[1050,7729,4370],{"class":1269},[1050,7731,1677],{"class":1071},[1050,7733,7734],{"class":1052,"line":5267},[1050,7735,7672],{"class":1105},[1050,7737,7738,7740,7742,7744,7747,7749,7751,7753,7756,7758,7760,7762,7764],{"class":1052,"line":5276},[1050,7739,3859],{"class":1632},[1050,7741,1072],{"class":1071},[1050,7743,2418],{"class":1063},[1050,7745,7746],{"class":1131},"\"Checkpoint: processed ",[1050,7748,2425],{"class":2424},[1050,7750,7367],{"class":1203},[1050,7752,2430],{"class":2424},[1050,7754,7755],{"class":1131}," posts, last ID: ",[1050,7757,2425],{"class":2424},[1050,7759,7229],{"class":1203},[1050,7761,2430],{"class":2424},[1050,7763,1504],{"class":1131},[1050,7765,1677],{"class":1071},[1050,7767,7768],{"class":1052,"line":5281},[1050,7769,1106],{"class":1105},[1050,7771,7772,7774,7776,7778,7780],{"class":1052,"line":5288},[1050,7773,6414],{"class":1695},[1050,7775,2744],{"class":1658},[1050,7777,2747],{"class":1695},[1050,7779,2750],{"class":1105},[1050,7781,1744],{"class":1071},[1050,7783,7784,7786,7788,7790,7793,7795,7797,7799,7801],{"class":1052,"line":5308},[1050,7785,6427],{"class":1632},[1050,7787,1072],{"class":1071},[1050,7789,2418],{"class":1063},[1050,7791,7792],{"class":1131},"\"Migration failed at checkpoint ",[1050,7794,2425],{"class":2424},[1050,7796,7280],{"class":1203},[1050,7798,2430],{"class":2424},[1050,7800,1504],{"class":1131},[1050,7802,1677],{"class":1071},[1050,7804,7805,7807,7809,7811,7814,7816,7818,7820,7822],{"class":1052,"line":5318},[1050,7806,6427],{"class":1632},[1050,7808,1072],{"class":1071},[1050,7810,2418],{"class":1063},[1050,7812,7813],{"class":1131},"\"Error: ",[1050,7815,2425],{"class":2424},[1050,7817,2788],{"class":1203},[1050,7819,2430],{"class":2424},[1050,7821,1504],{"class":1131},[1050,7823,1677],{"class":1071},[1050,7825,7826,7828,7830,7832,7835,7837],{"class":1052,"line":5323},[1050,7827,6427],{"class":1632},[1050,7829,1072],{"class":1071},[1050,7831,1504],{"class":1127},[1050,7833,7834],{"class":1131},"Migration can be resumed by running again",[1050,7836,1504],{"class":1127},[1050,7838,1677],{"class":1071},[1050,7840,7841],{"class":1052,"line":5334},[1050,7842,6454],{"class":1695},[1050,7844,7845],{"class":1052,"line":5352},[1050,7846,1106],{"class":1105},[1050,7848,7849,7852],{"class":1052,"line":5380},[1050,7850,7851],{"class":1695},"    finally",[1050,7853,1744],{"class":1071},[1050,7855,7856],{"class":1052,"line":5401},[1050,7857,7858],{"class":1056},"        # Clean up checkpoint on successful completion\n",[1050,7860,7861,7863,7866,7869,7871],{"class":1052,"line":5416},[1050,7862,1721],{"class":1695},[1050,7864,7865],{"class":1105}," processed_count ",[1050,7867,7868],{"class":1733},">=",[1050,7870,2252],{"class":1105},[1050,7872,1744],{"class":1071},[1050,7874,7875,7877,7879,7881,7883,7885],{"class":1052,"line":5435},[1050,7876,4428],{"class":1105},[1050,7878,1079],{"class":1071},[1050,7880,4433],{"class":1203},[1050,7882,1072],{"class":1071},[1050,7884,7219],{"class":1203},[1050,7886,1677],{"class":1071},[1050,7888,7889,7891,7893,7895,7898,7900],{"class":1052,"line":5441},[1050,7890,2413],{"class":1632},[1050,7892,1072],{"class":1071},[1050,7894,1504],{"class":1127},[1050,7896,7897],{"class":1131},"Migration completed successfully",[1050,7899,1504],{"class":1127},[1050,7901,1677],{"class":1071},[1030,7903,7905],{"id":7904},"performance-optimization","Performance Optimization",[1035,7907,7909],{"id":7908},"transaction-optimization-strategies","Transaction Optimization Strategies",[1040,7911,7913],{"className":1042,"code":7912,"language":1044,"meta":1045,"style":1045},"class TransactionOptimization:\n    \"\"\"Strategies for optimizing migration transactions\"\"\"\n    \n    @staticmethod\n    def bulk_operations_migration(apps, schema_editor):\n        \"\"\"Use bulk operations to minimize transaction overhead\"\"\"\n        \n        Post = apps.get_model('blog', 'Post')\n        \n        # Inefficient: Individual saves in transaction\n        # with transaction.atomic():\n        #     for post in Post.objects.all():\n        #         post.view_count = 0\n        #         post.save()\n        \n        # Efficient: Bulk update\n        with transaction.atomic():\n            Post.objects.all().update(view_count=0)\n        \n        # For more complex operations, use bulk_create/bulk_update\n        posts_to_update = []\n        \n        for post in Post.objects.all():\n            post.slug = slugify(post.title)\n            posts_to_update.append(post)\n        \n        # Bulk update (Django 2.2+)\n        Post.objects.bulk_update(posts_to_update, ['slug'], batch_size=1000)\n    \n    @staticmethod\n    def optimized_data_migration(apps, schema_editor):\n        \"\"\"Optimized data migration with minimal locking\"\"\"\n        \n        from django.db import connection\n        \n        # Use raw SQL for better performance\n        with connection.cursor() as cursor:\n            # Single SQL statement is more efficient than Python loop\n            cursor.execute(\"\"\"\n                UPDATE blog_post \n                SET slug = LOWER(REPLACE(REPLACE(title, ' ', '-'), '--', '-'))\n                WHERE slug IS NULL OR slug = ''\n            \"\"\")\n            \n            affected_rows = cursor.rowcount\n            print(f\"Updated {affected_rows} posts with slugs\")\n    \n    @staticmethod\n    def memory_efficient_migration(apps, schema_editor):\n        \"\"\"Memory-efficient migration for large datasets\"\"\"\n        \n        Post = apps.get_model('blog', 'Post')\n        \n        # Use iterator() to avoid loading all objects into memory\n        batch_size = 1000\n        posts_processed = 0\n        \n        # Process in chunks to manage memory usage\n        posts_queryset = Post.objects.all().iterator(chunk_size=batch_size)\n        \n        posts_to_update = []\n        \n        for post in posts_queryset:\n            post.search_content = f\"{post.title} {post.content}\"\n            posts_to_update.append(post)\n            \n            # Process batch when it reaches batch_size\n            if len(posts_to_update) >= batch_size:\n                with transaction.atomic():\n                    Post.objects.bulk_update(\n                        posts_to_update, \n                        ['search_content'], \n                        batch_size=batch_size\n                    )\n                \n                posts_processed += len(posts_to_update)\n                posts_to_update = []\n                \n                print(f\"Processed {posts_processed} posts\")\n        \n        # Process remaining posts\n        if posts_to_update:\n            with transaction.atomic():\n                Post.objects.bulk_update(\n                    posts_to_update, \n                    ['search_content'], \n                    batch_size=len(posts_to_update)\n                )\n            \n            posts_processed += len(posts_to_update)\n            print(f\"Final batch: processed {posts_processed} posts total\")\n\n# Database-specific optimizations\nclass DatabaseSpecificOptimizations:\n    \"\"\"Database-specific transaction optimizations\"\"\"\n    \n    @staticmethod\n    def postgresql_optimizations(apps, schema_editor):\n        \"\"\"PostgreSQL-specific optimizations\"\"\"\n        \n        from django.db import connection\n        \n        if connection.vendor != 'postgresql':\n            return\n        \n        with connection.cursor() as cursor:\n            # Disable autocommit for better performance\n            cursor.execute(\"SET autocommit = off\")\n            \n            try:\n                # Use COPY for bulk inserts (if applicable)\n                cursor.execute(\"BEGIN\")\n                \n                # Bulk operations here\n                cursor.execute(\"\"\"\n                    UPDATE blog_post \n                    SET updated_at = NOW() \n                    WHERE updated_at IS NULL\n                \"\"\")\n                \n                cursor.execute(\"COMMIT\")\n                \n            except Exception as e:\n                cursor.execute(\"ROLLBACK\")\n                raise\n            \n            finally:\n                cursor.execute(\"SET autocommit = on\")\n    \n    @staticmethod\n    def mysql_optimizations(apps, schema_editor):\n        \"\"\"MySQL-specific optimizations\"\"\"\n        \n        from django.db import connection\n        \n        if connection.vendor != 'mysql':\n            return\n        \n        with connection.cursor() as cursor:\n            # Disable foreign key checks for faster operations\n            cursor.execute(\"SET foreign_key_checks = 0\")\n            \n            try:\n                # Perform bulk operations\n                cursor.execute(\"\"\"\n                    UPDATE blog_post \n                    SET view_count = COALESCE(view_count, 0)\n                \"\"\")\n                \n            finally:\n                # Re-enable foreign key checks\n                cursor.execute(\"SET foreign_key_checks = 1\")\n    \n    @staticmethod\n    def sqlite_optimizations(apps, schema_editor):\n        \"\"\"SQLite-specific optimizations\"\"\"\n        \n        from django.db import connection\n        \n        if connection.vendor != 'sqlite':\n            return\n        \n        with connection.cursor() as cursor:\n            # Optimize SQLite for bulk operations\n            cursor.execute(\"PRAGMA synchronous = OFF\")\n            cursor.execute(\"PRAGMA journal_mode = MEMORY\")\n            \n            try:\n                # Perform operations\n                cursor.execute(\"\"\"\n                    UPDATE blog_post \n                    SET slug = lower(replace(title, ' ', '-'))\n                    WHERE slug IS NULL\n                \"\"\")\n                \n            finally:\n                # Restore normal settings\n                cursor.execute(\"PRAGMA synchronous = NORMAL\")\n                cursor.execute(\"PRAGMA journal_mode = DELETE\")\n",[1047,7914,7915,7924,7933,7937,7943,7960,7969,7973,8003,8007,8012,8017,8022,8027,8032,8036,8041,8053,8080,8084,8089,8098,8102,8122,8145,8160,8164,8169,8209,8213,8219,8236,8245,8249,8263,8267,8272,8290,8295,8307,8312,8317,8322,8329,8333,8347,8369,8373,8379,8396,8405,8409,8439,8443,8448,8456,8465,8469,8474,8507,8511,8519,8523,8535,8571,8585,8589,8594,8614,8626,8641,8651,8666,8676,8680,8684,8699,8708,8712,8733,8737,8742,8751,8763,8777,8786,8801,8817,8821,8825,8840,8862,8866,8871,8880,8889,8893,8899,8916,8925,8929,8943,8947,8967,8972,8976,8994,8999,9018,9022,9028,9033,9053,9057,9062,9074,9079,9084,9089,9096,9100,9119,9123,9135,9154,9158,9162,9169,9188,9192,9198,9215,9224,9228,9242,9246,9266,9270,9274,9292,9297,9316,9320,9326,9331,9343,9347,9352,9358,9362,9368,9373,9392,9396,9402,9419,9428,9432,9446,9450,9471,9475,9479,9497,9502,9521,9540,9544,9550,9555,9567,9571,9576,9581,9587,9591,9597,9602,9621],{"__ignoreMap":1045},[1050,7916,7917,7919,7922],{"class":1052,"line":1053},[1050,7918,1064],{"class":1063},[1050,7920,7921],{"class":1067}," TransactionOptimization",[1050,7923,1744],{"class":1071},[1050,7925,7926,7928,7931],{"class":1052,"line":1060},[1050,7927,1092],{"class":1091},[1050,7929,7930],{"class":1095},"Strategies for optimizing migration transactions",[1050,7932,1099],{"class":1091},[1050,7934,7935],{"class":1052,"line":1088},[1050,7936,1106],{"class":1105},[1050,7938,7939,7941],{"class":1052,"line":1102},[1050,7940,3566],{"class":1071},[1050,7942,3569],{"class":1658},[1050,7944,7945,7947,7950,7952,7954,7956,7958],{"class":1052,"line":1109},[1050,7946,1629],{"class":1063},[1050,7948,7949],{"class":2122}," bulk_operations_migration",[1050,7951,1072],{"class":1071},[1050,7953,2128],{"class":1644},[1050,7955,1137],{"class":1071},[1050,7957,2133],{"class":1644},[1050,7959,1085],{"class":1071},[1050,7961,7962,7964,7967],{"class":1052,"line":1121},[1050,7963,3591],{"class":1091},[1050,7965,7966],{"class":1095},"Use bulk operations to minimize transaction overhead",[1050,7968,1099],{"class":1091},[1050,7970,7971],{"class":1052,"line":1151},[1050,7972,1683],{"class":1105},[1050,7974,7975,7977,7979,7981,7983,7985,7987,7989,7991,7993,7995,7997,7999,8001],{"class":1052,"line":1157},[1050,7976,3636],{"class":1105},[1050,7978,1115],{"class":1071},[1050,7980,2158],{"class":1105},[1050,7982,1079],{"class":1071},[1050,7984,2163],{"class":1203},[1050,7986,1072],{"class":1071},[1050,7988,1128],{"class":1127},[1050,7990,1132],{"class":1131},[1050,7992,1128],{"class":1127},[1050,7994,1137],{"class":1071},[1050,7996,1140],{"class":1127},[1050,7998,2178],{"class":1131},[1050,8000,1128],{"class":1127},[1050,8002,1677],{"class":1071},[1050,8004,8005],{"class":1052,"line":1162},[1050,8006,1683],{"class":1105},[1050,8008,8009],{"class":1052,"line":1168},[1050,8010,8011],{"class":1056},"        # Inefficient: Individual saves in transaction\n",[1050,8013,8014],{"class":1052,"line":1180},[1050,8015,8016],{"class":1056},"        # with transaction.atomic():\n",[1050,8018,8019],{"class":1052,"line":1185},[1050,8020,8021],{"class":1056},"        #     for post in Post.objects.all():\n",[1050,8023,8024],{"class":1052,"line":1195},[1050,8025,8026],{"class":1056},"        #         post.view_count = 0\n",[1050,8028,8029],{"class":1052,"line":1210},[1050,8030,8031],{"class":1056},"        #         post.save()\n",[1050,8033,8034],{"class":1052,"line":1229},[1050,8035,1683],{"class":1105},[1050,8037,8038],{"class":1052,"line":1246},[1050,8039,8040],{"class":1056},"        # Efficient: Bulk update\n",[1050,8042,8043,8045,8047,8049,8051],{"class":1052,"line":1275},[1050,8044,2259],{"class":1695},[1050,8046,2262],{"class":1105},[1050,8048,1079],{"class":1071},[1050,8050,1762],{"class":1203},[1050,8052,2269],{"class":1071},[1050,8054,8055,8058,8060,8062,8064,8066,8068,8070,8072,8074,8076,8078],{"class":1052,"line":1281},[1050,8056,8057],{"class":1105},"            Post",[1050,8059,1079],{"class":1071},[1050,8061,2216],{"class":1729},[1050,8063,1079],{"class":1071},[1050,8065,2292],{"class":1203},[1050,8067,1662],{"class":1071},[1050,8069,3460],{"class":1203},[1050,8071,1072],{"class":1071},[1050,8073,1239],{"class":1213},[1050,8075,1115],{"class":1071},[1050,8077,1270],{"class":1269},[1050,8079,1677],{"class":1071},[1050,8081,8082],{"class":1052,"line":1292},[1050,8083,1683],{"class":1105},[1050,8085,8086],{"class":1052,"line":1307},[1050,8087,8088],{"class":1056},"        # For more complex operations, use bulk_create/bulk_update\n",[1050,8090,8091,8094,8096],{"class":1052,"line":1323},[1050,8092,8093],{"class":1105},"        posts_to_update ",[1050,8095,1115],{"class":1071},[1050,8097,4971],{"class":1071},[1050,8099,8100],{"class":1052,"line":1346},[1050,8101,1683],{"class":1105},[1050,8103,8104,8106,8108,8110,8112,8114,8116,8118,8120],{"class":1052,"line":1351},[1050,8105,3698],{"class":1695},[1050,8107,2326],{"class":1105},[1050,8109,2329],{"class":1695},[1050,8111,2211],{"class":1105},[1050,8113,1079],{"class":1071},[1050,8115,2216],{"class":1729},[1050,8117,1079],{"class":1071},[1050,8119,2292],{"class":1203},[1050,8121,2269],{"class":1071},[1050,8123,8124,8127,8129,8131,8133,8135,8137,8139,8141,8143],{"class":1052,"line":1357},[1050,8125,8126],{"class":1105},"            post",[1050,8128,1079],{"class":1071},[1050,8130,2355],{"class":1729},[1050,8132,1765],{"class":1071},[1050,8134,2371],{"class":1203},[1050,8136,1072],{"class":1071},[1050,8138,1221],{"class":1203},[1050,8140,1079],{"class":1071},[1050,8142,2380],{"class":1729},[1050,8144,1677],{"class":1071},[1050,8146,8147,8150,8152,8154,8156,8158],{"class":1052,"line":1362},[1050,8148,8149],{"class":1105},"            posts_to_update",[1050,8151,1079],{"class":1071},[1050,8153,5013],{"class":1203},[1050,8155,1072],{"class":1071},[1050,8157,1221],{"class":1203},[1050,8159,1677],{"class":1071},[1050,8161,8162],{"class":1052,"line":1369},[1050,8163,1683],{"class":1105},[1050,8165,8166],{"class":1052,"line":1375},[1050,8167,8168],{"class":1056},"        # Bulk update (Django 2.2+)\n",[1050,8170,8171,8174,8176,8178,8180,8183,8185,8188,8190,8192,8194,8196,8198,8200,8202,8204,8207],{"class":1052,"line":1392},[1050,8172,8173],{"class":1105},"        Post",[1050,8175,1079],{"class":1071},[1050,8177,2216],{"class":1729},[1050,8179,1079],{"class":1071},[1050,8181,8182],{"class":1203},"bulk_update",[1050,8184,1072],{"class":1071},[1050,8186,8187],{"class":1203},"posts_to_update",[1050,8189,1137],{"class":1071},[1050,8191,6525],{"class":1071},[1050,8193,1128],{"class":1127},[1050,8195,2355],{"class":1131},[1050,8197,1128],{"class":1127},[1050,8199,1910],{"class":1071},[1050,8201,2310],{"class":1213},[1050,8203,1115],{"class":1071},[1050,8205,8206],{"class":1269},"1000",[1050,8208,1677],{"class":1071},[1050,8210,8211],{"class":1052,"line":1402},[1050,8212,1106],{"class":1105},[1050,8214,8215,8217],{"class":1052,"line":1407},[1050,8216,3566],{"class":1071},[1050,8218,3569],{"class":1658},[1050,8220,8221,8223,8226,8228,8230,8232,8234],{"class":1052,"line":1416},[1050,8222,1629],{"class":1063},[1050,8224,8225],{"class":2122}," optimized_data_migration",[1050,8227,1072],{"class":1071},[1050,8229,2128],{"class":1644},[1050,8231,1137],{"class":1071},[1050,8233,2133],{"class":1644},[1050,8235,1085],{"class":1071},[1050,8237,8238,8240,8243],{"class":1052,"line":1438},[1050,8239,3591],{"class":1091},[1050,8241,8242],{"class":1095},"Optimized data migration with minimal locking",[1050,8244,1099],{"class":1091},[1050,8246,8247],{"class":1052,"line":1443},[1050,8248,1683],{"class":1105},[1050,8250,8251,8253,8255,8257,8259,8261],{"class":1052,"line":1448},[1050,8252,1696],{"class":1695},[1050,8254,1699],{"class":1105},[1050,8256,1079],{"class":1071},[1050,8258,1704],{"class":1105},[1050,8260,1707],{"class":1695},[1050,8262,1710],{"class":1105},[1050,8264,8265],{"class":1052,"line":1454},[1050,8266,1683],{"class":1105},[1050,8268,8269],{"class":1052,"line":1464},[1050,8270,8271],{"class":1056},"        # Use raw SQL for better performance\n",[1050,8273,8274,8276,8278,8280,8282,8284,8286,8288],{"class":1052,"line":1469},[1050,8275,2259],{"class":1695},[1050,8277,1724],{"class":1105},[1050,8279,1079],{"class":1071},[1050,8281,2967],{"class":1203},[1050,8283,2970],{"class":1071},[1050,8285,2747],{"class":1695},[1050,8287,2975],{"class":1105},[1050,8289,1744],{"class":1071},[1050,8291,8292],{"class":1052,"line":1478},[1050,8293,8294],{"class":1056},"            # Single SQL statement is more efficient than Python loop\n",[1050,8296,8297,8299,8301,8303,8305],{"class":1052,"line":1484},[1050,8298,2983],{"class":1105},[1050,8300,1079],{"class":1071},[1050,8302,2988],{"class":1203},[1050,8304,1072],{"class":1071},[1050,8306,1099],{"class":1127},[1050,8308,8309],{"class":1052,"line":1496},[1050,8310,8311],{"class":1131},"                UPDATE blog_post \n",[1050,8313,8314],{"class":1052,"line":1514},[1050,8315,8316],{"class":1131},"                SET slug = LOWER(REPLACE(REPLACE(title, ' ', '-'), '--', '-'))\n",[1050,8318,8319],{"class":1052,"line":1531},[1050,8320,8321],{"class":1131},"                WHERE slug IS NULL OR slug = ''\n",[1050,8323,8324,8327],{"class":1052,"line":1536},[1050,8325,8326],{"class":1127},"            \"\"\"",[1050,8328,1677],{"class":1071},[1050,8330,8331],{"class":1052,"line":1541},[1050,8332,2318],{"class":1105},[1050,8334,8335,8338,8340,8342,8344],{"class":1052,"line":1546},[1050,8336,8337],{"class":1105},"            affected_rows ",[1050,8339,1115],{"class":1071},[1050,8341,2975],{"class":1105},[1050,8343,1079],{"class":1071},[1050,8345,8346],{"class":1729},"rowcount\n",[1050,8348,8349,8351,8353,8355,8357,8359,8362,8364,8367],{"class":1052,"line":1552},[1050,8350,2413],{"class":1632},[1050,8352,1072],{"class":1071},[1050,8354,2418],{"class":1063},[1050,8356,3508],{"class":1131},[1050,8358,2425],{"class":2424},[1050,8360,8361],{"class":1203},"affected_rows",[1050,8363,2430],{"class":2424},[1050,8365,8366],{"class":1131}," posts with slugs\"",[1050,8368,1677],{"class":1071},[1050,8370,8371],{"class":1052,"line":1570},[1050,8372,1106],{"class":1105},[1050,8374,8375,8377],{"class":1052,"line":1580},[1050,8376,3566],{"class":1071},[1050,8378,3569],{"class":1658},[1050,8380,8381,8383,8386,8388,8390,8392,8394],{"class":1052,"line":1585},[1050,8382,1629],{"class":1063},[1050,8384,8385],{"class":2122}," memory_efficient_migration",[1050,8387,1072],{"class":1071},[1050,8389,2128],{"class":1644},[1050,8391,1137],{"class":1071},[1050,8393,2133],{"class":1644},[1050,8395,1085],{"class":1071},[1050,8397,8398,8400,8403],{"class":1052,"line":1594},[1050,8399,3591],{"class":1091},[1050,8401,8402],{"class":1095},"Memory-efficient migration for large datasets",[1050,8404,1099],{"class":1091},[1050,8406,8407],{"class":1052,"line":1616},[1050,8408,1683],{"class":1105},[1050,8410,8411,8413,8415,8417,8419,8421,8423,8425,8427,8429,8431,8433,8435,8437],{"class":1052,"line":1621},[1050,8412,3636],{"class":1105},[1050,8414,1115],{"class":1071},[1050,8416,2158],{"class":1105},[1050,8418,1079],{"class":1071},[1050,8420,2163],{"class":1203},[1050,8422,1072],{"class":1071},[1050,8424,1128],{"class":1127},[1050,8426,1132],{"class":1131},[1050,8428,1128],{"class":1127},[1050,8430,1137],{"class":1071},[1050,8432,1140],{"class":1127},[1050,8434,2178],{"class":1131},[1050,8436,1128],{"class":1127},[1050,8438,1677],{"class":1071},[1050,8440,8441],{"class":1052,"line":1626},[1050,8442,1683],{"class":1105},[1050,8444,8445],{"class":1052,"line":1655},[1050,8446,8447],{"class":1056},"        # Use iterator() to avoid loading all objects into memory\n",[1050,8449,8450,8452,8454],{"class":1052,"line":1680},[1050,8451,3321],{"class":1105},[1050,8453,1115],{"class":1071},[1050,8455,2201],{"class":1269},[1050,8457,8458,8461,8463],{"class":1052,"line":1686},[1050,8459,8460],{"class":1105},"        posts_processed ",[1050,8462,1115],{"class":1071},[1050,8464,2234],{"class":1269},[1050,8466,8467],{"class":1052,"line":1692},[1050,8468,1683],{"class":1105},[1050,8470,8471],{"class":1052,"line":1713},[1050,8472,8473],{"class":1056},"        # Process in chunks to manage memory usage\n",[1050,8475,8476,8478,8480,8482,8484,8486,8488,8490,8492,8495,8497,8500,8502,8505],{"class":1052,"line":1718},[1050,8477,7409],{"class":1105},[1050,8479,1115],{"class":1071},[1050,8481,2211],{"class":1105},[1050,8483,1079],{"class":1071},[1050,8485,2216],{"class":1729},[1050,8487,1079],{"class":1071},[1050,8489,2292],{"class":1203},[1050,8491,1662],{"class":1071},[1050,8493,8494],{"class":1203},"iterator",[1050,8496,1072],{"class":1071},[1050,8498,8499],{"class":1213},"chunk_size",[1050,8501,1115],{"class":1071},[1050,8503,8504],{"class":1203},"batch_size",[1050,8506,1677],{"class":1071},[1050,8508,8509],{"class":1052,"line":1747},[1050,8510,1683],{"class":1105},[1050,8512,8513,8515,8517],{"class":1052,"line":1753},[1050,8514,8093],{"class":1105},[1050,8516,1115],{"class":1071},[1050,8518,4971],{"class":1071},[1050,8520,8521],{"class":1052,"line":1770},[1050,8522,1683],{"class":1105},[1050,8524,8525,8527,8529,8531,8533],{"class":1052,"line":1793},[1050,8526,3698],{"class":1695},[1050,8528,2326],{"class":1105},[1050,8530,2329],{"class":1695},[1050,8532,7497],{"class":1105},[1050,8534,1744],{"class":1071},[1050,8536,8537,8539,8541,8543,8545,8547,8549,8551,8553,8555,8557,8559,8561,8563,8565,8567,8569],{"class":1052,"line":1799},[1050,8538,8126],{"class":1105},[1050,8540,1079],{"class":1071},[1050,8542,7574],{"class":1729},[1050,8544,1765],{"class":1071},[1050,8546,5179],{"class":1063},[1050,8548,1504],{"class":1131},[1050,8550,2425],{"class":2424},[1050,8552,1221],{"class":1105},[1050,8554,1079],{"class":1071},[1050,8556,2380],{"class":1729},[1050,8558,2430],{"class":2424},[1050,8560,7224],{"class":2424},[1050,8562,1221],{"class":1105},[1050,8564,1079],{"class":1071},[1050,8566,3789],{"class":1729},[1050,8568,2430],{"class":2424},[1050,8570,5566],{"class":1131},[1050,8572,8573,8575,8577,8579,8581,8583],{"class":1052,"line":1812},[1050,8574,8149],{"class":1105},[1050,8576,1079],{"class":1071},[1050,8578,5013],{"class":1203},[1050,8580,1072],{"class":1071},[1050,8582,1221],{"class":1203},[1050,8584,1677],{"class":1071},[1050,8586,8587],{"class":1052,"line":1820},[1050,8588,2318],{"class":1105},[1050,8590,8591],{"class":1052,"line":1826},[1050,8592,8593],{"class":1056},"            # Process batch when it reaches batch_size\n",[1050,8595,8596,8598,8600,8602,8604,8607,8610,8612],{"class":1052,"line":1839},[1050,8597,6856],{"class":1695},[1050,8599,7660],{"class":1632},[1050,8601,1072],{"class":1071},[1050,8603,8187],{"class":1203},[1050,8605,8606],{"class":1071},")",[1050,8608,8609],{"class":1733}," >=",[1050,8611,2310],{"class":1105},[1050,8613,1744],{"class":1071},[1050,8615,8616,8618,8620,8622,8624],{"class":1052,"line":1844},[1050,8617,3725],{"class":1695},[1050,8619,2262],{"class":1105},[1050,8621,1079],{"class":1071},[1050,8623,1762],{"class":1203},[1050,8625,2269],{"class":1071},[1050,8627,8628,8631,8633,8635,8637,8639],{"class":1052,"line":1853},[1050,8629,8630],{"class":1105},"                    Post",[1050,8632,1079],{"class":1071},[1050,8634,2216],{"class":1729},[1050,8636,1079],{"class":1071},[1050,8638,8182],{"class":1203},[1050,8640,1207],{"class":1071},[1050,8642,8643,8646,8648],{"class":1052,"line":1865},[1050,8644,8645],{"class":1203},"                        posts_to_update",[1050,8647,1137],{"class":1071},[1050,8649,8650],{"class":1203}," \n",[1050,8652,8653,8656,8658,8660,8662,8664],{"class":1052,"line":1880},[1050,8654,8655],{"class":1071},"                        [",[1050,8657,1128],{"class":1127},[1050,8659,7574],{"class":1131},[1050,8661,1128],{"class":1127},[1050,8663,1910],{"class":1071},[1050,8665,8650],{"class":1203},[1050,8667,8668,8671,8673],{"class":1052,"line":1926},[1050,8669,8670],{"class":1213},"                        batch_size",[1050,8672,1115],{"class":1071},[1050,8674,8675],{"class":1203},"batch_size\n",[1050,8677,8678],{"class":1052,"line":1931},[1050,8679,2683],{"class":1071},[1050,8681,8682],{"class":1052,"line":2802},[1050,8683,3407],{"class":1105},[1050,8685,8686,8689,8691,8693,8695,8697],{"class":1052,"line":2807},[1050,8687,8688],{"class":1105},"                posts_processed ",[1050,8690,2405],{"class":1071},[1050,8692,7660],{"class":1632},[1050,8694,1072],{"class":1071},[1050,8696,8187],{"class":1203},[1050,8698,1677],{"class":1071},[1050,8700,8701,8704,8706],{"class":1052,"line":2813},[1050,8702,8703],{"class":1105},"                posts_to_update ",[1050,8705,1115],{"class":1071},[1050,8707,4971],{"class":1071},[1050,8709,8710],{"class":1052,"line":2831},[1050,8711,3407],{"class":1105},[1050,8713,8714,8716,8718,8720,8722,8724,8727,8729,8731],{"class":1052,"line":2841},[1050,8715,3501],{"class":1632},[1050,8717,1072],{"class":1071},[1050,8719,2418],{"class":1063},[1050,8721,2421],{"class":1131},[1050,8723,2425],{"class":2424},[1050,8725,8726],{"class":1203},"posts_processed",[1050,8728,2430],{"class":2424},[1050,8730,2443],{"class":1131},[1050,8732,1677],{"class":1071},[1050,8734,8735],{"class":1052,"line":2846},[1050,8736,1683],{"class":1105},[1050,8738,8739],{"class":1052,"line":2855},[1050,8740,8741],{"class":1056},"        # Process remaining posts\n",[1050,8743,8744,8746,8749],{"class":1052,"line":2877},[1050,8745,1721],{"class":1695},[1050,8747,8748],{"class":1105}," posts_to_update",[1050,8750,1744],{"class":1071},[1050,8752,8753,8755,8757,8759,8761],{"class":1052,"line":2882},[1050,8754,3361],{"class":1695},[1050,8756,2262],{"class":1105},[1050,8758,1079],{"class":1071},[1050,8760,1762],{"class":1203},[1050,8762,2269],{"class":1071},[1050,8764,8765,8767,8769,8771,8773,8775],{"class":1052,"line":2887},[1050,8766,3413],{"class":1105},[1050,8768,1079],{"class":1071},[1050,8770,2216],{"class":1729},[1050,8772,1079],{"class":1071},[1050,8774,8182],{"class":1203},[1050,8776,1207],{"class":1071},[1050,8778,8779,8782,8784],{"class":1052,"line":2908},[1050,8780,8781],{"class":1203},"                    posts_to_update",[1050,8783,1137],{"class":1071},[1050,8785,8650],{"class":1203},[1050,8787,8788,8791,8793,8795,8797,8799],{"class":1052,"line":2927},[1050,8789,8790],{"class":1071},"                    [",[1050,8792,1128],{"class":1127},[1050,8794,7574],{"class":1131},[1050,8796,1128],{"class":1127},[1050,8798,1910],{"class":1071},[1050,8800,8650],{"class":1203},[1050,8802,8803,8806,8808,8811,8813,8815],{"class":1052,"line":2932},[1050,8804,8805],{"class":1213},"                    batch_size",[1050,8807,1115],{"class":1071},[1050,8809,8810],{"class":1632},"len",[1050,8812,1072],{"class":1071},[1050,8814,8187],{"class":1203},[1050,8816,1677],{"class":1071},[1050,8818,8819],{"class":1052,"line":2938},[1050,8820,4654],{"class":1071},[1050,8822,8823],{"class":1052,"line":2953},[1050,8824,2318],{"class":1105},[1050,8826,8827,8830,8832,8834,8836,8838],{"class":1052,"line":2958},[1050,8828,8829],{"class":1105},"            posts_processed ",[1050,8831,2405],{"class":1071},[1050,8833,7660],{"class":1632},[1050,8835,1072],{"class":1071},[1050,8837,8187],{"class":1203},[1050,8839,1677],{"class":1071},[1050,8841,8842,8844,8846,8848,8851,8853,8855,8857,8860],{"class":1052,"line":2980},[1050,8843,2413],{"class":1632},[1050,8845,1072],{"class":1071},[1050,8847,2418],{"class":1063},[1050,8849,8850],{"class":1131},"\"Final batch: processed ",[1050,8852,2425],{"class":2424},[1050,8854,8726],{"class":1203},[1050,8856,2430],{"class":2424},[1050,8858,8859],{"class":1131}," posts total\"",[1050,8861,1677],{"class":1071},[1050,8863,8864],{"class":1052,"line":3002},[1050,8865,1366],{"emptyLinePlaceholder":1365},[1050,8867,8868],{"class":1052,"line":3023},[1050,8869,8870],{"class":1056},"# Database-specific optimizations\n",[1050,8872,8873,8875,8878],{"class":1052,"line":3028},[1050,8874,1064],{"class":1063},[1050,8876,8877],{"class":1067}," DatabaseSpecificOptimizations",[1050,8879,1744],{"class":1071},[1050,8881,8882,8884,8887],{"class":1052,"line":3034},[1050,8883,1092],{"class":1091},[1050,8885,8886],{"class":1095},"Database-specific transaction optimizations",[1050,8888,1099],{"class":1091},[1050,8890,8891],{"class":1052,"line":3053},[1050,8892,1106],{"class":1105},[1050,8894,8895,8897],{"class":1052,"line":3058},[1050,8896,3566],{"class":1071},[1050,8898,3569],{"class":1658},[1050,8900,8901,8903,8906,8908,8910,8912,8914],{"class":1052,"line":3067},[1050,8902,1629],{"class":1063},[1050,8904,8905],{"class":2122}," postgresql_optimizations",[1050,8907,1072],{"class":1071},[1050,8909,2128],{"class":1644},[1050,8911,1137],{"class":1071},[1050,8913,2133],{"class":1644},[1050,8915,1085],{"class":1071},[1050,8917,8918,8920,8923],{"class":1052,"line":3078},[1050,8919,3591],{"class":1091},[1050,8921,8922],{"class":1095},"PostgreSQL-specific optimizations",[1050,8924,1099],{"class":1091},[1050,8926,8927],{"class":1052,"line":3090},[1050,8928,1683],{"class":1105},[1050,8930,8931,8933,8935,8937,8939,8941],{"class":1052,"line":3109},[1050,8932,1696],{"class":1695},[1050,8934,1699],{"class":1105},[1050,8936,1079],{"class":1071},[1050,8938,1704],{"class":1105},[1050,8940,1707],{"class":1695},[1050,8942,1710],{"class":1105},[1050,8944,8945],{"class":1052,"line":3114},[1050,8946,1683],{"class":1105},[1050,8948,8949,8951,8953,8955,8957,8959,8961,8963,8965],{"class":1052,"line":3119},[1050,8950,1721],{"class":1695},[1050,8952,1724],{"class":1105},[1050,8954,1079],{"class":1071},[1050,8956,1730],{"class":1729},[1050,8958,4763],{"class":1733},[1050,8960,1140],{"class":1127},[1050,8962,1739],{"class":1131},[1050,8964,1128],{"class":1127},[1050,8966,1744],{"class":1071},[1050,8968,8969],{"class":1052,"line":3124},[1050,8970,8971],{"class":1695},"            return\n",[1050,8973,8974],{"class":1052,"line":3142},[1050,8975,1683],{"class":1105},[1050,8977,8978,8980,8982,8984,8986,8988,8990,8992],{"class":1052,"line":3152},[1050,8979,2259],{"class":1695},[1050,8981,1724],{"class":1105},[1050,8983,1079],{"class":1071},[1050,8985,2967],{"class":1203},[1050,8987,2970],{"class":1071},[1050,8989,2747],{"class":1695},[1050,8991,2975],{"class":1105},[1050,8993,1744],{"class":1071},[1050,8995,8996],{"class":1052,"line":3157},[1050,8997,8998],{"class":1056},"            # Disable autocommit for better performance\n",[1050,9000,9001,9003,9005,9007,9009,9011,9014,9016],{"class":1052,"line":3188},[1050,9002,2983],{"class":1105},[1050,9004,1079],{"class":1071},[1050,9006,2988],{"class":1203},[1050,9008,1072],{"class":1071},[1050,9010,1504],{"class":1127},[1050,9012,9013],{"class":1131},"SET autocommit = off",[1050,9015,1504],{"class":1127},[1050,9017,1677],{"class":1071},[1050,9019,9020],{"class":1052,"line":3207},[1050,9021,2318],{"class":1105},[1050,9023,9024,9026],{"class":1052,"line":3212},[1050,9025,3718],{"class":1695},[1050,9027,1744],{"class":1071},[1050,9029,9030],{"class":1052,"line":3228},[1050,9031,9032],{"class":1056},"                # Use COPY for bulk inserts (if applicable)\n",[1050,9034,9035,9038,9040,9042,9044,9046,9049,9051],{"class":1052,"line":3234},[1050,9036,9037],{"class":1105},"                cursor",[1050,9039,1079],{"class":1071},[1050,9041,2988],{"class":1203},[1050,9043,1072],{"class":1071},[1050,9045,1504],{"class":1127},[1050,9047,9048],{"class":1131},"BEGIN",[1050,9050,1504],{"class":1127},[1050,9052,1677],{"class":1071},[1050,9054,9055],{"class":1052,"line":3247},[1050,9056,3407],{"class":1105},[1050,9058,9059],{"class":1052,"line":3268},[1050,9060,9061],{"class":1056},"                # Bulk operations here\n",[1050,9063,9064,9066,9068,9070,9072],{"class":1052,"line":3288},[1050,9065,9037],{"class":1105},[1050,9067,1079],{"class":1071},[1050,9069,2988],{"class":1203},[1050,9071,1072],{"class":1071},[1050,9073,1099],{"class":1127},[1050,9075,9076],{"class":1052,"line":3299},[1050,9077,9078],{"class":1131},"                    UPDATE blog_post \n",[1050,9080,9081],{"class":1052,"line":3304},[1050,9082,9083],{"class":1131},"                    SET updated_at = NOW() \n",[1050,9085,9086],{"class":1052,"line":3312},[1050,9087,9088],{"class":1131},"                    WHERE updated_at IS NULL\n",[1050,9090,9091,9094],{"class":1052,"line":3318},[1050,9092,9093],{"class":1127},"                \"\"\"",[1050,9095,1677],{"class":1071},[1050,9097,9098],{"class":1052,"line":3329},[1050,9099,3407],{"class":1105},[1050,9101,9102,9104,9106,9108,9110,9112,9115,9117],{"class":1052,"line":3339},[1050,9103,9037],{"class":1105},[1050,9105,1079],{"class":1071},[1050,9107,2988],{"class":1203},[1050,9109,1072],{"class":1071},[1050,9111,1504],{"class":1127},[1050,9113,9114],{"class":1131},"COMMIT",[1050,9116,1504],{"class":1127},[1050,9118,1677],{"class":1071},[1050,9120,9121],{"class":1052,"line":3344},[1050,9122,3407],{"class":1105},[1050,9124,9125,9127,9129,9131,9133],{"class":1052,"line":3358},[1050,9126,3826],{"class":1695},[1050,9128,2744],{"class":1658},[1050,9130,2747],{"class":1695},[1050,9132,2750],{"class":1105},[1050,9134,1744],{"class":1071},[1050,9136,9137,9139,9141,9143,9145,9147,9150,9152],{"class":1052,"line":3372},[1050,9138,9037],{"class":1105},[1050,9140,1079],{"class":1071},[1050,9142,2988],{"class":1203},[1050,9144,1072],{"class":1071},[1050,9146,1504],{"class":1127},[1050,9148,9149],{"class":1131},"ROLLBACK",[1050,9151,1504],{"class":1127},[1050,9153,1677],{"class":1071},[1050,9155,9156],{"class":1052,"line":3404},[1050,9157,4892],{"class":1695},[1050,9159,9160],{"class":1052,"line":3410},[1050,9161,2318],{"class":1105},[1050,9163,9164,9167],{"class":1052,"line":3427},[1050,9165,9166],{"class":1695},"            finally",[1050,9168,1744],{"class":1071},[1050,9170,9171,9173,9175,9177,9179,9181,9184,9186],{"class":1052,"line":3454},[1050,9172,9037],{"class":1105},[1050,9174,1079],{"class":1071},[1050,9176,2988],{"class":1203},[1050,9178,1072],{"class":1071},[1050,9180,1504],{"class":1127},[1050,9182,9183],{"class":1131},"SET autocommit = on",[1050,9185,1504],{"class":1127},[1050,9187,1677],{"class":1071},[1050,9189,9190],{"class":1052,"line":3483},[1050,9191,1106],{"class":1105},[1050,9193,9194,9196],{"class":1052,"line":3488},[1050,9195,3566],{"class":1071},[1050,9197,3569],{"class":1658},[1050,9199,9200,9202,9205,9207,9209,9211,9213],{"class":1052,"line":3498},[1050,9201,1629],{"class":1063},[1050,9203,9204],{"class":2122}," mysql_optimizations",[1050,9206,1072],{"class":1071},[1050,9208,2128],{"class":1644},[1050,9210,1137],{"class":1071},[1050,9212,2133],{"class":1644},[1050,9214,1085],{"class":1071},[1050,9216,9217,9219,9222],{"class":1052,"line":5074},[1050,9218,3591],{"class":1091},[1050,9220,9221],{"class":1095},"MySQL-specific optimizations",[1050,9223,1099],{"class":1091},[1050,9225,9226],{"class":1052,"line":5096},[1050,9227,1683],{"class":1105},[1050,9229,9230,9232,9234,9236,9238,9240],{"class":1052,"line":5107},[1050,9231,1696],{"class":1695},[1050,9233,1699],{"class":1105},[1050,9235,1079],{"class":1071},[1050,9237,1704],{"class":1105},[1050,9239,1707],{"class":1695},[1050,9241,1710],{"class":1105},[1050,9243,9244],{"class":1052,"line":5118},[1050,9245,1683],{"class":1105},[1050,9247,9248,9250,9252,9254,9256,9258,9260,9262,9264],{"class":1052,"line":5134},[1050,9249,1721],{"class":1695},[1050,9251,1724],{"class":1105},[1050,9253,1079],{"class":1071},[1050,9255,1730],{"class":1729},[1050,9257,4763],{"class":1733},[1050,9259,1140],{"class":1127},[1050,9261,1786],{"class":1131},[1050,9263,1128],{"class":1127},[1050,9265,1744],{"class":1071},[1050,9267,9268],{"class":1052,"line":5150},[1050,9269,8971],{"class":1695},[1050,9271,9272],{"class":1052,"line":5155},[1050,9273,1683],{"class":1105},[1050,9275,9276,9278,9280,9282,9284,9286,9288,9290],{"class":1052,"line":5160},[1050,9277,2259],{"class":1695},[1050,9279,1724],{"class":1105},[1050,9281,1079],{"class":1071},[1050,9283,2967],{"class":1203},[1050,9285,2970],{"class":1071},[1050,9287,2747],{"class":1695},[1050,9289,2975],{"class":1105},[1050,9291,1744],{"class":1071},[1050,9293,9294],{"class":1052,"line":5165},[1050,9295,9296],{"class":1056},"            # Disable foreign key checks for faster operations\n",[1050,9298,9299,9301,9303,9305,9307,9309,9312,9314],{"class":1052,"line":5171},[1050,9300,2983],{"class":1105},[1050,9302,1079],{"class":1071},[1050,9304,2988],{"class":1203},[1050,9306,1072],{"class":1071},[1050,9308,1504],{"class":1127},[1050,9310,9311],{"class":1131},"SET foreign_key_checks = 0",[1050,9313,1504],{"class":1127},[1050,9315,1677],{"class":1071},[1050,9317,9318],{"class":1052,"line":5185},[1050,9319,2318],{"class":1105},[1050,9321,9322,9324],{"class":1052,"line":5191},[1050,9323,3718],{"class":1695},[1050,9325,1744],{"class":1071},[1050,9327,9328],{"class":1052,"line":5196},[1050,9329,9330],{"class":1056},"                # Perform bulk operations\n",[1050,9332,9333,9335,9337,9339,9341],{"class":1052,"line":5202},[1050,9334,9037],{"class":1105},[1050,9336,1079],{"class":1071},[1050,9338,2988],{"class":1203},[1050,9340,1072],{"class":1071},[1050,9342,1099],{"class":1127},[1050,9344,9345],{"class":1052,"line":5216},[1050,9346,9078],{"class":1131},[1050,9348,9349],{"class":1052,"line":5221},[1050,9350,9351],{"class":1131},"                    SET view_count = COALESCE(view_count, 0)\n",[1050,9353,9354,9356],{"class":1052,"line":5227},[1050,9355,9093],{"class":1127},[1050,9357,1677],{"class":1071},[1050,9359,9360],{"class":1052,"line":5233},[1050,9361,3407],{"class":1105},[1050,9363,9364,9366],{"class":1052,"line":5238},[1050,9365,9166],{"class":1695},[1050,9367,1744],{"class":1071},[1050,9369,9370],{"class":1052,"line":5243},[1050,9371,9372],{"class":1056},"                # Re-enable foreign key checks\n",[1050,9374,9375,9377,9379,9381,9383,9385,9388,9390],{"class":1052,"line":5257},[1050,9376,9037],{"class":1105},[1050,9378,1079],{"class":1071},[1050,9380,2988],{"class":1203},[1050,9382,1072],{"class":1071},[1050,9384,1504],{"class":1127},[1050,9386,9387],{"class":1131},"SET foreign_key_checks = 1",[1050,9389,1504],{"class":1127},[1050,9391,1677],{"class":1071},[1050,9393,9394],{"class":1052,"line":5262},[1050,9395,1106],{"class":1105},[1050,9397,9398,9400],{"class":1052,"line":5267},[1050,9399,3566],{"class":1071},[1050,9401,3569],{"class":1658},[1050,9403,9404,9406,9409,9411,9413,9415,9417],{"class":1052,"line":5276},[1050,9405,1629],{"class":1063},[1050,9407,9408],{"class":2122}," sqlite_optimizations",[1050,9410,1072],{"class":1071},[1050,9412,2128],{"class":1644},[1050,9414,1137],{"class":1071},[1050,9416,2133],{"class":1644},[1050,9418,1085],{"class":1071},[1050,9420,9421,9423,9426],{"class":1052,"line":5281},[1050,9422,3591],{"class":1091},[1050,9424,9425],{"class":1095},"SQLite-specific optimizations",[1050,9427,1099],{"class":1091},[1050,9429,9430],{"class":1052,"line":5288},[1050,9431,1683],{"class":1105},[1050,9433,9434,9436,9438,9440,9442,9444],{"class":1052,"line":5308},[1050,9435,1696],{"class":1695},[1050,9437,1699],{"class":1105},[1050,9439,1079],{"class":1071},[1050,9441,1704],{"class":1105},[1050,9443,1707],{"class":1695},[1050,9445,1710],{"class":1105},[1050,9447,9448],{"class":1052,"line":5318},[1050,9449,1683],{"class":1105},[1050,9451,9452,9454,9456,9458,9460,9462,9464,9467,9469],{"class":1052,"line":5323},[1050,9453,1721],{"class":1695},[1050,9455,1724],{"class":1105},[1050,9457,1079],{"class":1071},[1050,9459,1730],{"class":1729},[1050,9461,4763],{"class":1733},[1050,9463,1140],{"class":1127},[1050,9465,9466],{"class":1131},"sqlite",[1050,9468,1128],{"class":1127},[1050,9470,1744],{"class":1071},[1050,9472,9473],{"class":1052,"line":5334},[1050,9474,8971],{"class":1695},[1050,9476,9477],{"class":1052,"line":5352},[1050,9478,1683],{"class":1105},[1050,9480,9481,9483,9485,9487,9489,9491,9493,9495],{"class":1052,"line":5380},[1050,9482,2259],{"class":1695},[1050,9484,1724],{"class":1105},[1050,9486,1079],{"class":1071},[1050,9488,2967],{"class":1203},[1050,9490,2970],{"class":1071},[1050,9492,2747],{"class":1695},[1050,9494,2975],{"class":1105},[1050,9496,1744],{"class":1071},[1050,9498,9499],{"class":1052,"line":5401},[1050,9500,9501],{"class":1056},"            # Optimize SQLite for bulk operations\n",[1050,9503,9504,9506,9508,9510,9512,9514,9517,9519],{"class":1052,"line":5416},[1050,9505,2983],{"class":1105},[1050,9507,1079],{"class":1071},[1050,9509,2988],{"class":1203},[1050,9511,1072],{"class":1071},[1050,9513,1504],{"class":1127},[1050,9515,9516],{"class":1131},"PRAGMA synchronous = OFF",[1050,9518,1504],{"class":1127},[1050,9520,1677],{"class":1071},[1050,9522,9523,9525,9527,9529,9531,9533,9536,9538],{"class":1052,"line":5435},[1050,9524,2983],{"class":1105},[1050,9526,1079],{"class":1071},[1050,9528,2988],{"class":1203},[1050,9530,1072],{"class":1071},[1050,9532,1504],{"class":1127},[1050,9534,9535],{"class":1131},"PRAGMA journal_mode = MEMORY",[1050,9537,1504],{"class":1127},[1050,9539,1677],{"class":1071},[1050,9541,9542],{"class":1052,"line":5441},[1050,9543,2318],{"class":1105},[1050,9545,9546,9548],{"class":1052,"line":5446},[1050,9547,3718],{"class":1695},[1050,9549,1744],{"class":1071},[1050,9551,9552],{"class":1052,"line":5466},[1050,9553,9554],{"class":1056},"                # Perform operations\n",[1050,9556,9557,9559,9561,9563,9565],{"class":1052,"line":5471},[1050,9558,9037],{"class":1105},[1050,9560,1079],{"class":1071},[1050,9562,2988],{"class":1203},[1050,9564,1072],{"class":1071},[1050,9566,1099],{"class":1127},[1050,9568,9569],{"class":1052,"line":5477},[1050,9570,9078],{"class":1131},[1050,9572,9573],{"class":1052,"line":5510},[1050,9574,9575],{"class":1131},"                    SET slug = lower(replace(title, ' ', '-'))\n",[1050,9577,9578],{"class":1052,"line":5533},[1050,9579,9580],{"class":1131},"                    WHERE slug IS NULL\n",[1050,9582,9583,9585],{"class":1052,"line":5546},[1050,9584,9093],{"class":1127},[1050,9586,1677],{"class":1071},[1050,9588,9589],{"class":1052,"line":5558},[1050,9590,3407],{"class":1105},[1050,9592,9593,9595],{"class":1052,"line":5569},[1050,9594,9166],{"class":1695},[1050,9596,1744],{"class":1071},[1050,9598,9599],{"class":1052,"line":5575},[1050,9600,9601],{"class":1056},"                # Restore normal settings\n",[1050,9603,9604,9606,9608,9610,9612,9614,9617,9619],{"class":1052,"line":5600},[1050,9605,9037],{"class":1105},[1050,9607,1079],{"class":1071},[1050,9609,2988],{"class":1203},[1050,9611,1072],{"class":1071},[1050,9613,1504],{"class":1127},[1050,9615,9616],{"class":1131},"PRAGMA synchronous = NORMAL",[1050,9618,1504],{"class":1127},[1050,9620,1677],{"class":1071},[1050,9622,9623,9625,9627,9629,9631,9633,9636,9638],{"class":1052,"line":5605},[1050,9624,9037],{"class":1105},[1050,9626,1079],{"class":1071},[1050,9628,2988],{"class":1203},[1050,9630,1072],{"class":1071},[1050,9632,1504],{"class":1127},[1050,9634,9635],{"class":1131},"PRAGMA journal_mode = DELETE",[1050,9637,1504],{"class":1127},[1050,9639,1677],{"class":1071},[1026,9641,9642],{},"Understanding transaction handling in Django migrations ensures data integrity while optimizing performance. Proper use of atomic operations, error handling, and database-specific optimizations enables safe and efficient schema evolution in production environments.",[9644,9645,9646],"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 .s5Kfy, html code.shiki .s5Kfy{--shiki-light:#9C3EDA;--shiki-default:#AB5959;--shiki-dark:#CB7676}html pre.shiki code .sD-vU, html code.shiki .sD-vU{--shiki-light:#E2931D;--shiki-default:#2E8F82;--shiki-dark:#5DA994}html pre.shiki code .soVBu, html code.shiki .soVBu{--shiki-light:#39ADB5;--shiki-default:#999999;--shiki-dark:#666666}html pre.shiki code .sYn-s, html code.shiki .sYn-s{--shiki-light:#E2931D;--shiki-default:#59873A;--shiki-dark:#80A665}html pre.shiki code .sm7ve, html code.shiki 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