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5.2.3 release notes","/releases/5.2.3","releases/5.2.3",{"title":981,"path":982,"stem":983},"Django 5.2.4 release notes","/releases/5.2.4","releases/5.2.4",{"title":985,"path":986,"stem":987},"Django 5.2.5 release notes","/releases/5.2.5","releases/5.2.5",{"title":989,"path":990,"stem":991},"Django 5.2.6 release notes","/releases/5.2.6","releases/5.2.6",{"title":993,"path":994,"stem":995},"Django 5.2.7 release notes","/releases/5.2.7","releases/5.2.7",{"title":997,"path":998,"stem":999},"Django 5.2.8 release notes","/releases/5.2.8","releases/5.2.8",{"title":1001,"path":1002,"stem":1003},"Django 5.2.9 release notes","/releases/5.2.9","releases/5.2.9",{"title":1005,"path":1006,"stem":1007},"Django 6.0 release notes","/releases/6.0","releases/6.0",{"title":1009,"path":1010,"stem":1011},"Django 6.0.1 release notes","/releases/6.0.1","releases/6.0.1",{"title":1013,"path":1014,"stem":1015},"Django 6.1 release notes - UNDER DEVELOPMENT","/releases/6.1","releases/6.1",{"id":1017,"title":789,"body":1018,"description":8930,"extension":8931,"links":8932,"meta":8933,"navigation":1212,"path":790,"seo":8934,"stem":791,"__hash__":8935},"docs/21.performance-and-optimization/04.using-select-related-and-prefetch-related.md",{"type":1019,"value":1020,"toc":8897},"minimark",[1021,1025,1038,1043,1048,1055,1068,1074,1085,1646,1650,1654,1920,1924,2049,2053,2305,2309,2504,2508,2512,2784,2788,3144,3148,3314,3318,3658,3662,3666,3893,3897,4381,4385,4389,5235,5239,6675,6679,6683,7452,7456,7929,7933,8433,8437,8441,8885,8893],[1022,1023,789],"h1",{"id":1024},"using-select-related-and-prefetch-related",[1026,1027,1028,1029,1033,1034,1037],"p",{},"Django's ",[1030,1031,1032],"code",{},"select_related"," and ",[1030,1035,1036],{},"prefetch_related"," are the most powerful tools for eliminating N+1 query problems and optimizing database access. This chapter provides comprehensive coverage of these optimization techniques, from basic usage to advanced patterns that can reduce query counts from hundreds to just a few.",[1039,1040,1042],"h2",{"id":1041},"understanding-the-difference","Understanding the Difference",[1044,1045,1047],"h3",{"id":1046},"select-related-vs-prefetch-related","Select Related vs Prefetch Related",[1026,1049,1050,1054],{},[1051,1052,1053],"strong",{},"Select Related",": Uses SQL JOINs to fetch related objects in a single query",[1056,1057,1058,1062,1065],"ul",{},[1059,1060,1061],"li",{},"Works with: ForeignKey and OneToOneField relationships",[1059,1063,1064],{},"Creates: One complex query with JOINs",[1059,1066,1067],{},"Best for: Forward relationships and reverse OneToOne",[1026,1069,1070,1073],{},[1051,1071,1072],{},"Prefetch Related",": Uses separate queries and Python joins",[1056,1075,1076,1079,1082],{},[1059,1077,1078],{},"Works with: ManyToManyField and reverse ForeignKey relationships",[1059,1080,1081],{},"Creates: Multiple optimized queries",[1059,1083,1084],{},"Best for: Many-to-many and reverse foreign key relationships",[1086,1087,1092],"pre",{"className":1088,"code":1089,"language":1090,"meta":1091,"style":1091},"language-python shiki shiki-themes material-theme-lighter vitesse-light vitesse-dark","# Example models for demonstration\nclass Author(models.Model):\n    name = models.CharField(max_length=100)\n    email = models.CharField(max_length=100)\n    bio = models.TextField()\n\nclass Category(models.Model):\n    name = models.CharField(max_length=50)\n    description = models.TextField()\n\nclass Tag(models.Model):\n    name = models.CharField(max_length=30)\n\nclass Article(models.Model):\n    title = models.CharField(max_length=200)\n    content = models.TextField()\n    author = models.ForeignKey(Author, on_delete=models.CASCADE)\n    category = models.ForeignKey(Category, on_delete=models.CASCADE)\n    tags = models.ManyToManyField(Tag)\n    created_at = models.DateTimeField(auto_now_add=True)\n\nclass Comment(models.Model):\n    article = models.ForeignKey(Article, on_delete=models.CASCADE, related_name='comments')\n    author = models.ForeignKey(Author, on_delete=models.CASCADE)\n    content = models.TextField()\n    created_at = models.DateTimeField(auto_now_add=True)\n","python","",[1030,1093,1094,1103,1131,1165,1189,1207,1214,1232,1256,1272,1277,1295,1319,1324,1342,1367,1383,1421,1454,1476,1504,1509,1527,1577,1608,1623],{"__ignoreMap":1091},[1095,1096,1099],"span",{"class":1097,"line":1098},"line",1,[1095,1100,1102],{"class":1101},"s9Tkl","# Example models for demonstration\n",[1095,1104,1106,1110,1114,1118,1122,1125,1128],{"class":1097,"line":1105},2,[1095,1107,1109],{"class":1108},"s5Kfy","class",[1095,1111,1113],{"class":1112},"sD-vU"," Author",[1095,1115,1117],{"class":1116},"soVBu","(",[1095,1119,1121],{"class":1120},"sYn-s","models",[1095,1123,1124],{"class":1116},".",[1095,1126,1127],{"class":1120},"Model",[1095,1129,1130],{"class":1116},"):\n",[1095,1132,1134,1138,1141,1144,1146,1150,1152,1156,1158,1162],{"class":1097,"line":1133},3,[1095,1135,1137],{"class":1136},"sftqT","    name ",[1095,1139,1140],{"class":1116},"=",[1095,1142,1143],{"class":1136}," models",[1095,1145,1124],{"class":1116},[1095,1147,1149],{"class":1148},"siWMO","CharField",[1095,1151,1117],{"class":1116},[1095,1153,1155],{"class":1154},"sqOPj","max_length",[1095,1157,1140],{"class":1116},[1095,1159,1161],{"class":1160},"s7CZa","100",[1095,1163,1164],{"class":1116},")\n",[1095,1166,1168,1171,1173,1175,1177,1179,1181,1183,1185,1187],{"class":1097,"line":1167},4,[1095,1169,1170],{"class":1136},"    email ",[1095,1172,1140],{"class":1116},[1095,1174,1143],{"class":1136},[1095,1176,1124],{"class":1116},[1095,1178,1149],{"class":1148},[1095,1180,1117],{"class":1116},[1095,1182,1155],{"class":1154},[1095,1184,1140],{"class":1116},[1095,1186,1161],{"class":1160},[1095,1188,1164],{"class":1116},[1095,1190,1192,1195,1197,1199,1201,1204],{"class":1097,"line":1191},5,[1095,1193,1194],{"class":1136},"    bio ",[1095,1196,1140],{"class":1116},[1095,1198,1143],{"class":1136},[1095,1200,1124],{"class":1116},[1095,1202,1203],{"class":1148},"TextField",[1095,1205,1206],{"class":1116},"()\n",[1095,1208,1210],{"class":1097,"line":1209},6,[1095,1211,1213],{"emptyLinePlaceholder":1212},true,"\n",[1095,1215,1217,1219,1222,1224,1226,1228,1230],{"class":1097,"line":1216},7,[1095,1218,1109],{"class":1108},[1095,1220,1221],{"class":1112}," Category",[1095,1223,1117],{"class":1116},[1095,1225,1121],{"class":1120},[1095,1227,1124],{"class":1116},[1095,1229,1127],{"class":1120},[1095,1231,1130],{"class":1116},[1095,1233,1235,1237,1239,1241,1243,1245,1247,1249,1251,1254],{"class":1097,"line":1234},8,[1095,1236,1137],{"class":1136},[1095,1238,1140],{"class":1116},[1095,1240,1143],{"class":1136},[1095,1242,1124],{"class":1116},[1095,1244,1149],{"class":1148},[1095,1246,1117],{"class":1116},[1095,1248,1155],{"class":1154},[1095,1250,1140],{"class":1116},[1095,1252,1253],{"class":1160},"50",[1095,1255,1164],{"class":1116},[1095,1257,1259,1262,1264,1266,1268,1270],{"class":1097,"line":1258},9,[1095,1260,1261],{"class":1136},"    description ",[1095,1263,1140],{"class":1116},[1095,1265,1143],{"class":1136},[1095,1267,1124],{"class":1116},[1095,1269,1203],{"class":1148},[1095,1271,1206],{"class":1116},[1095,1273,1275],{"class":1097,"line":1274},10,[1095,1276,1213],{"emptyLinePlaceholder":1212},[1095,1278,1280,1282,1285,1287,1289,1291,1293],{"class":1097,"line":1279},11,[1095,1281,1109],{"class":1108},[1095,1283,1284],{"class":1112}," Tag",[1095,1286,1117],{"class":1116},[1095,1288,1121],{"class":1120},[1095,1290,1124],{"class":1116},[1095,1292,1127],{"class":1120},[1095,1294,1130],{"class":1116},[1095,1296,1298,1300,1302,1304,1306,1308,1310,1312,1314,1317],{"class":1097,"line":1297},12,[1095,1299,1137],{"class":1136},[1095,1301,1140],{"class":1116},[1095,1303,1143],{"class":1136},[1095,1305,1124],{"class":1116},[1095,1307,1149],{"class":1148},[1095,1309,1117],{"class":1116},[1095,1311,1155],{"class":1154},[1095,1313,1140],{"class":1116},[1095,1315,1316],{"class":1160},"30",[1095,1318,1164],{"class":1116},[1095,1320,1322],{"class":1097,"line":1321},13,[1095,1323,1213],{"emptyLinePlaceholder":1212},[1095,1325,1327,1329,1332,1334,1336,1338,1340],{"class":1097,"line":1326},14,[1095,1328,1109],{"class":1108},[1095,1330,1331],{"class":1112}," Article",[1095,1333,1117],{"class":1116},[1095,1335,1121],{"class":1120},[1095,1337,1124],{"class":1116},[1095,1339,1127],{"class":1120},[1095,1341,1130],{"class":1116},[1095,1343,1345,1348,1350,1352,1354,1356,1358,1360,1362,1365],{"class":1097,"line":1344},15,[1095,1346,1347],{"class":1136},"    title ",[1095,1349,1140],{"class":1116},[1095,1351,1143],{"class":1136},[1095,1353,1124],{"class":1116},[1095,1355,1149],{"class":1148},[1095,1357,1117],{"class":1116},[1095,1359,1155],{"class":1154},[1095,1361,1140],{"class":1116},[1095,1363,1364],{"class":1160},"200",[1095,1366,1164],{"class":1116},[1095,1368,1370,1373,1375,1377,1379,1381],{"class":1097,"line":1369},16,[1095,1371,1372],{"class":1136},"    content ",[1095,1374,1140],{"class":1116},[1095,1376,1143],{"class":1136},[1095,1378,1124],{"class":1116},[1095,1380,1203],{"class":1148},[1095,1382,1206],{"class":1116},[1095,1384,1386,1389,1391,1393,1395,1398,1400,1403,1406,1409,1411,1413,1415,1419],{"class":1097,"line":1385},17,[1095,1387,1388],{"class":1136},"    author ",[1095,1390,1140],{"class":1116},[1095,1392,1143],{"class":1136},[1095,1394,1124],{"class":1116},[1095,1396,1397],{"class":1148},"ForeignKey",[1095,1399,1117],{"class":1116},[1095,1401,1402],{"class":1148},"Author",[1095,1404,1405],{"class":1116},",",[1095,1407,1408],{"class":1154}," on_delete",[1095,1410,1140],{"class":1116},[1095,1412,1121],{"class":1148},[1095,1414,1124],{"class":1116},[1095,1416,1418],{"class":1417},"sFGJz","CASCADE",[1095,1420,1164],{"class":1116},[1095,1422,1424,1427,1429,1431,1433,1435,1437,1440,1442,1444,1446,1448,1450,1452],{"class":1097,"line":1423},18,[1095,1425,1426],{"class":1136},"    category ",[1095,1428,1140],{"class":1116},[1095,1430,1143],{"class":1136},[1095,1432,1124],{"class":1116},[1095,1434,1397],{"class":1148},[1095,1436,1117],{"class":1116},[1095,1438,1439],{"class":1148},"Category",[1095,1441,1405],{"class":1116},[1095,1443,1408],{"class":1154},[1095,1445,1140],{"class":1116},[1095,1447,1121],{"class":1148},[1095,1449,1124],{"class":1116},[1095,1451,1418],{"class":1417},[1095,1453,1164],{"class":1116},[1095,1455,1457,1460,1462,1464,1466,1469,1471,1474],{"class":1097,"line":1456},19,[1095,1458,1459],{"class":1136},"    tags ",[1095,1461,1140],{"class":1116},[1095,1463,1143],{"class":1136},[1095,1465,1124],{"class":1116},[1095,1467,1468],{"class":1148},"ManyToManyField",[1095,1470,1117],{"class":1116},[1095,1472,1473],{"class":1148},"Tag",[1095,1475,1164],{"class":1116},[1095,1477,1479,1482,1484,1486,1488,1491,1493,1496,1498,1502],{"class":1097,"line":1478},20,[1095,1480,1481],{"class":1136},"    created_at ",[1095,1483,1140],{"class":1116},[1095,1485,1143],{"class":1136},[1095,1487,1124],{"class":1116},[1095,1489,1490],{"class":1148},"DateTimeField",[1095,1492,1117],{"class":1116},[1095,1494,1495],{"class":1154},"auto_now_add",[1095,1497,1140],{"class":1116},[1095,1499,1501],{"class":1500},"s8XtY","True",[1095,1503,1164],{"class":1116},[1095,1505,1507],{"class":1097,"line":1506},21,[1095,1508,1213],{"emptyLinePlaceholder":1212},[1095,1510,1512,1514,1517,1519,1521,1523,1525],{"class":1097,"line":1511},22,[1095,1513,1109],{"class":1108},[1095,1515,1516],{"class":1112}," Comment",[1095,1518,1117],{"class":1116},[1095,1520,1121],{"class":1120},[1095,1522,1124],{"class":1116},[1095,1524,1127],{"class":1120},[1095,1526,1130],{"class":1116},[1095,1528,1530,1533,1535,1537,1539,1541,1543,1546,1548,1550,1552,1554,1556,1558,1560,1563,1565,1569,1573,1575],{"class":1097,"line":1529},23,[1095,1531,1532],{"class":1136},"    article ",[1095,1534,1140],{"class":1116},[1095,1536,1143],{"class":1136},[1095,1538,1124],{"class":1116},[1095,1540,1397],{"class":1148},[1095,1542,1117],{"class":1116},[1095,1544,1545],{"class":1148},"Article",[1095,1547,1405],{"class":1116},[1095,1549,1408],{"class":1154},[1095,1551,1140],{"class":1116},[1095,1553,1121],{"class":1148},[1095,1555,1124],{"class":1116},[1095,1557,1418],{"class":1417},[1095,1559,1405],{"class":1116},[1095,1561,1562],{"class":1154}," related_name",[1095,1564,1140],{"class":1116},[1095,1566,1568],{"class":1567},"sbYkP","'",[1095,1570,1572],{"class":1571},"sTbE_","comments",[1095,1574,1568],{"class":1567},[1095,1576,1164],{"class":1116},[1095,1578,1580,1582,1584,1586,1588,1590,1592,1594,1596,1598,1600,1602,1604,1606],{"class":1097,"line":1579},24,[1095,1581,1388],{"class":1136},[1095,1583,1140],{"class":1116},[1095,1585,1143],{"class":1136},[1095,1587,1124],{"class":1116},[1095,1589,1397],{"class":1148},[1095,1591,1117],{"class":1116},[1095,1593,1402],{"class":1148},[1095,1595,1405],{"class":1116},[1095,1597,1408],{"class":1154},[1095,1599,1140],{"class":1116},[1095,1601,1121],{"class":1148},[1095,1603,1124],{"class":1116},[1095,1605,1418],{"class":1417},[1095,1607,1164],{"class":1116},[1095,1609,1611,1613,1615,1617,1619,1621],{"class":1097,"line":1610},25,[1095,1612,1372],{"class":1136},[1095,1614,1140],{"class":1116},[1095,1616,1143],{"class":1136},[1095,1618,1124],{"class":1116},[1095,1620,1203],{"class":1148},[1095,1622,1206],{"class":1116},[1095,1624,1626,1628,1630,1632,1634,1636,1638,1640,1642,1644],{"class":1097,"line":1625},26,[1095,1627,1481],{"class":1136},[1095,1629,1140],{"class":1116},[1095,1631,1143],{"class":1136},[1095,1633,1124],{"class":1116},[1095,1635,1490],{"class":1148},[1095,1637,1117],{"class":1116},[1095,1639,1495],{"class":1154},[1095,1641,1140],{"class":1116},[1095,1643,1501],{"class":1500},[1095,1645,1164],{"class":1116},[1039,1647,1649],{"id":1648},"select-related-deep-dive","Select Related Deep Dive",[1044,1651,1653],{"id":1652},"basic-select-related-usage","Basic Select Related Usage",[1086,1655,1657],{"className":1088,"code":1656,"language":1090,"meta":1091,"style":1091},"# WITHOUT select_related: N+1 queries\ndef bad_article_list():\n    articles = Article.objects.all()[:10]  # 1 query\n    \n    for article in articles:\n        print(article.author.name)     # 10 additional queries\n        print(article.category.name)   # 10 additional queries\n    \n    # Total: 21 queries\n\n# WITH select_related: 1 query\ndef good_article_list():\n    articles = Article.objects.select_related('author', 'category').all()[:10]  # 1 query\n    \n    for article in articles:\n        print(article.author.name)     # No additional query\n        print(article.category.name)   # No additional query\n    \n    # Total: 1 query\n",[1030,1658,1659,1664,1676,1708,1713,1731,1758,1780,1784,1789,1793,1798,1807,1853,1857,1869,1890,1911,1915],{"__ignoreMap":1091},[1095,1660,1661],{"class":1097,"line":1098},[1095,1662,1663],{"class":1101},"# WITHOUT select_related: N+1 queries\n",[1095,1665,1666,1669,1673],{"class":1097,"line":1105},[1095,1667,1668],{"class":1108},"def",[1095,1670,1672],{"class":1671},"sljsM"," bad_article_list",[1095,1674,1675],{"class":1116},"():\n",[1095,1677,1678,1681,1683,1685,1687,1691,1693,1696,1699,1702,1705],{"class":1097,"line":1133},[1095,1679,1680],{"class":1136},"    articles ",[1095,1682,1140],{"class":1116},[1095,1684,1331],{"class":1136},[1095,1686,1124],{"class":1116},[1095,1688,1690],{"class":1689},"sBPpx","objects",[1095,1692,1124],{"class":1116},[1095,1694,1695],{"class":1148},"all",[1095,1697,1698],{"class":1116},"()[:",[1095,1700,1701],{"class":1160},"10",[1095,1703,1704],{"class":1116},"]",[1095,1706,1707],{"class":1101},"  # 1 query\n",[1095,1709,1710],{"class":1097,"line":1167},[1095,1711,1712],{"class":1136},"    \n",[1095,1714,1715,1719,1722,1725,1728],{"class":1097,"line":1191},[1095,1716,1718],{"class":1717},"siDh9","    for",[1095,1720,1721],{"class":1136}," article ",[1095,1723,1724],{"class":1717},"in",[1095,1726,1727],{"class":1136}," articles",[1095,1729,1730],{"class":1116},":\n",[1095,1732,1733,1737,1739,1742,1744,1747,1749,1752,1755],{"class":1097,"line":1209},[1095,1734,1736],{"class":1735},"sJdAF","        print",[1095,1738,1117],{"class":1116},[1095,1740,1741],{"class":1148},"article",[1095,1743,1124],{"class":1116},[1095,1745,1746],{"class":1689},"author",[1095,1748,1124],{"class":1116},[1095,1750,1751],{"class":1689},"name",[1095,1753,1754],{"class":1116},")",[1095,1756,1757],{"class":1101},"     # 10 additional queries\n",[1095,1759,1760,1762,1764,1766,1768,1771,1773,1775,1777],{"class":1097,"line":1216},[1095,1761,1736],{"class":1735},[1095,1763,1117],{"class":1116},[1095,1765,1741],{"class":1148},[1095,1767,1124],{"class":1116},[1095,1769,1770],{"class":1689},"category",[1095,1772,1124],{"class":1116},[1095,1774,1751],{"class":1689},[1095,1776,1754],{"class":1116},[1095,1778,1779],{"class":1101},"   # 10 additional queries\n",[1095,1781,1782],{"class":1097,"line":1234},[1095,1783,1712],{"class":1136},[1095,1785,1786],{"class":1097,"line":1258},[1095,1787,1788],{"class":1101},"    # Total: 21 queries\n",[1095,1790,1791],{"class":1097,"line":1274},[1095,1792,1213],{"emptyLinePlaceholder":1212},[1095,1794,1795],{"class":1097,"line":1279},[1095,1796,1797],{"class":1101},"# WITH select_related: 1 query\n",[1095,1799,1800,1802,1805],{"class":1097,"line":1297},[1095,1801,1668],{"class":1108},[1095,1803,1804],{"class":1671}," good_article_list",[1095,1806,1675],{"class":1116},[1095,1808,1809,1811,1813,1815,1817,1819,1821,1823,1825,1827,1829,1831,1833,1836,1838,1840,1843,1845,1847,1849,1851],{"class":1097,"line":1321},[1095,1810,1680],{"class":1136},[1095,1812,1140],{"class":1116},[1095,1814,1331],{"class":1136},[1095,1816,1124],{"class":1116},[1095,1818,1690],{"class":1689},[1095,1820,1124],{"class":1116},[1095,1822,1032],{"class":1148},[1095,1824,1117],{"class":1116},[1095,1826,1568],{"class":1567},[1095,1828,1746],{"class":1571},[1095,1830,1568],{"class":1567},[1095,1832,1405],{"class":1116},[1095,1834,1835],{"class":1567}," '",[1095,1837,1770],{"class":1571},[1095,1839,1568],{"class":1567},[1095,1841,1842],{"class":1116},").",[1095,1844,1695],{"class":1148},[1095,1846,1698],{"class":1116},[1095,1848,1701],{"class":1160},[1095,1850,1704],{"class":1116},[1095,1852,1707],{"class":1101},[1095,1854,1855],{"class":1097,"line":1326},[1095,1856,1712],{"class":1136},[1095,1858,1859,1861,1863,1865,1867],{"class":1097,"line":1344},[1095,1860,1718],{"class":1717},[1095,1862,1721],{"class":1136},[1095,1864,1724],{"class":1717},[1095,1866,1727],{"class":1136},[1095,1868,1730],{"class":1116},[1095,1870,1871,1873,1875,1877,1879,1881,1883,1885,1887],{"class":1097,"line":1369},[1095,1872,1736],{"class":1735},[1095,1874,1117],{"class":1116},[1095,1876,1741],{"class":1148},[1095,1878,1124],{"class":1116},[1095,1880,1746],{"class":1689},[1095,1882,1124],{"class":1116},[1095,1884,1751],{"class":1689},[1095,1886,1754],{"class":1116},[1095,1888,1889],{"class":1101},"     # No additional query\n",[1095,1891,1892,1894,1896,1898,1900,1902,1904,1906,1908],{"class":1097,"line":1385},[1095,1893,1736],{"class":1735},[1095,1895,1117],{"class":1116},[1095,1897,1741],{"class":1148},[1095,1899,1124],{"class":1116},[1095,1901,1770],{"class":1689},[1095,1903,1124],{"class":1116},[1095,1905,1751],{"class":1689},[1095,1907,1754],{"class":1116},[1095,1909,1910],{"class":1101},"   # No additional query\n",[1095,1912,1913],{"class":1097,"line":1423},[1095,1914,1712],{"class":1136},[1095,1916,1917],{"class":1097,"line":1456},[1095,1918,1919],{"class":1101},"    # Total: 1 query\n",[1044,1921,1923],{"id":1922},"multi-level-select-related","Multi-Level Select Related",[1086,1925,1927],{"className":1088,"code":1926,"language":1090,"meta":1091,"style":1091},"# Following relationships through multiple levels\narticles = Article.objects.select_related(\n    'author',\n    'author__profile',  # If Author has a profile\n    'category',\n    'category__parent'  # If Category has a parent\n).all()\n\n# Generated SQL includes multiple JOINs:\n# SELECT article.*, author.*, profile.*, category.*, parent_category.*\n# FROM articles_article article\n# INNER JOIN authors_author author ON article.author_id = author.id\n# LEFT OUTER JOIN profiles_profile profile ON author.profile_id = profile.id\n# INNER JOIN categories_category category ON article.category_id = category.id\n# LEFT OUTER JOIN categories_category parent_category ON category.parent_id = parent_category.id\n",[1030,1928,1929,1934,1954,1966,1980,1990,2002,2010,2014,2019,2024,2029,2034,2039,2044],{"__ignoreMap":1091},[1095,1930,1931],{"class":1097,"line":1098},[1095,1932,1933],{"class":1101},"# Following relationships through multiple levels\n",[1095,1935,1936,1939,1941,1943,1945,1947,1949,1951],{"class":1097,"line":1105},[1095,1937,1938],{"class":1136},"articles ",[1095,1940,1140],{"class":1116},[1095,1942,1331],{"class":1136},[1095,1944,1124],{"class":1116},[1095,1946,1690],{"class":1689},[1095,1948,1124],{"class":1116},[1095,1950,1032],{"class":1148},[1095,1952,1953],{"class":1116},"(\n",[1095,1955,1956,1959,1961,1963],{"class":1097,"line":1133},[1095,1957,1958],{"class":1567},"    '",[1095,1960,1746],{"class":1571},[1095,1962,1568],{"class":1567},[1095,1964,1965],{"class":1116},",\n",[1095,1967,1968,1970,1973,1975,1977],{"class":1097,"line":1167},[1095,1969,1958],{"class":1567},[1095,1971,1972],{"class":1571},"author__profile",[1095,1974,1568],{"class":1567},[1095,1976,1405],{"class":1116},[1095,1978,1979],{"class":1101},"  # If Author has a profile\n",[1095,1981,1982,1984,1986,1988],{"class":1097,"line":1191},[1095,1983,1958],{"class":1567},[1095,1985,1770],{"class":1571},[1095,1987,1568],{"class":1567},[1095,1989,1965],{"class":1116},[1095,1991,1992,1994,1997,1999],{"class":1097,"line":1209},[1095,1993,1958],{"class":1567},[1095,1995,1996],{"class":1571},"category__parent",[1095,1998,1568],{"class":1567},[1095,2000,2001],{"class":1101},"  # If Category has a parent\n",[1095,2003,2004,2006,2008],{"class":1097,"line":1216},[1095,2005,1842],{"class":1116},[1095,2007,1695],{"class":1148},[1095,2009,1206],{"class":1116},[1095,2011,2012],{"class":1097,"line":1234},[1095,2013,1213],{"emptyLinePlaceholder":1212},[1095,2015,2016],{"class":1097,"line":1258},[1095,2017,2018],{"class":1101},"# Generated SQL includes multiple JOINs:\n",[1095,2020,2021],{"class":1097,"line":1274},[1095,2022,2023],{"class":1101},"# SELECT article.*, author.*, profile.*, category.*, parent_category.*\n",[1095,2025,2026],{"class":1097,"line":1279},[1095,2027,2028],{"class":1101},"# FROM articles_article article\n",[1095,2030,2031],{"class":1097,"line":1297},[1095,2032,2033],{"class":1101},"# INNER JOIN authors_author author ON article.author_id = author.id\n",[1095,2035,2036],{"class":1097,"line":1321},[1095,2037,2038],{"class":1101},"# LEFT OUTER JOIN profiles_profile profile ON author.profile_id = profile.id\n",[1095,2040,2041],{"class":1097,"line":1326},[1095,2042,2043],{"class":1101},"# INNER JOIN categories_category category ON article.category_id = category.id\n",[1095,2045,2046],{"class":1097,"line":1344},[1095,2047,2048],{"class":1101},"# LEFT OUTER JOIN categories_category parent_category ON category.parent_id = parent_category.id\n",[1044,2050,2052],{"id":2051},"conditional-select-related","Conditional Select Related",[1086,2054,2056],{"className":1088,"code":2055,"language":1090,"meta":1091,"style":1091},"def get_articles_with_conditional_select_related(include_author=True, include_category=True):\n    \"\"\"Conditionally apply select_related based on needs\"\"\"\n    queryset = Article.objects.all()\n    \n    select_related_fields = []\n    \n    if include_author:\n        select_related_fields.extend(['author', 'author__profile'])\n    \n    if include_category:\n        select_related_fields.append('category')\n    \n    if select_related_fields:\n        queryset = queryset.select_related(*select_related_fields)\n    \n    return queryset\n\n# Usage\narticles_with_author = get_articles_with_conditional_select_related(\n    include_author=True, \n    include_category=False\n)\n",[1030,2057,2058,2087,2100,2119,2123,2133,2137,2147,2177,2181,2189,2208,2212,2221,2245,2249,2257,2261,2266,2277,2291,2301],{"__ignoreMap":1091},[1095,2059,2060,2062,2065,2067,2071,2074,2076,2078,2081,2083,2085],{"class":1097,"line":1098},[1095,2061,1668],{"class":1108},[1095,2063,2064],{"class":1671}," get_articles_with_conditional_select_related",[1095,2066,1117],{"class":1116},[1095,2068,2070],{"class":2069},"sCyAa","include_author",[1095,2072,1140],{"class":2073},"sVsLi",[1095,2075,1501],{"class":1500},[1095,2077,1405],{"class":1116},[1095,2079,2080],{"class":2069}," include_category",[1095,2082,1140],{"class":2073},[1095,2084,1501],{"class":1500},[1095,2086,1130],{"class":1116},[1095,2088,2089,2093,2097],{"class":1097,"line":1105},[1095,2090,2092],{"class":2091},"sm7ve","    \"\"\"",[1095,2094,2096],{"class":2095},"sVyVU","Conditionally apply select_related based on needs",[1095,2098,2099],{"class":2091},"\"\"\"\n",[1095,2101,2102,2105,2107,2109,2111,2113,2115,2117],{"class":1097,"line":1133},[1095,2103,2104],{"class":1136},"    queryset ",[1095,2106,1140],{"class":1116},[1095,2108,1331],{"class":1136},[1095,2110,1124],{"class":1116},[1095,2112,1690],{"class":1689},[1095,2114,1124],{"class":1116},[1095,2116,1695],{"class":1148},[1095,2118,1206],{"class":1116},[1095,2120,2121],{"class":1097,"line":1167},[1095,2122,1712],{"class":1136},[1095,2124,2125,2128,2130],{"class":1097,"line":1191},[1095,2126,2127],{"class":1136},"    select_related_fields ",[1095,2129,1140],{"class":1116},[1095,2131,2132],{"class":1116}," []\n",[1095,2134,2135],{"class":1097,"line":1209},[1095,2136,1712],{"class":1136},[1095,2138,2139,2142,2145],{"class":1097,"line":1216},[1095,2140,2141],{"class":1717},"    if",[1095,2143,2144],{"class":1136}," include_author",[1095,2146,1730],{"class":1116},[1095,2148,2149,2152,2154,2157,2160,2162,2164,2166,2168,2170,2172,2174],{"class":1097,"line":1234},[1095,2150,2151],{"class":1136},"        select_related_fields",[1095,2153,1124],{"class":1116},[1095,2155,2156],{"class":1148},"extend",[1095,2158,2159],{"class":1116},"([",[1095,2161,1568],{"class":1567},[1095,2163,1746],{"class":1571},[1095,2165,1568],{"class":1567},[1095,2167,1405],{"class":1116},[1095,2169,1835],{"class":1567},[1095,2171,1972],{"class":1571},[1095,2173,1568],{"class":1567},[1095,2175,2176],{"class":1116},"])\n",[1095,2178,2179],{"class":1097,"line":1258},[1095,2180,1712],{"class":1136},[1095,2182,2183,2185,2187],{"class":1097,"line":1274},[1095,2184,2141],{"class":1717},[1095,2186,2080],{"class":1136},[1095,2188,1730],{"class":1116},[1095,2190,2191,2193,2195,2198,2200,2202,2204,2206],{"class":1097,"line":1279},[1095,2192,2151],{"class":1136},[1095,2194,1124],{"class":1116},[1095,2196,2197],{"class":1148},"append",[1095,2199,1117],{"class":1116},[1095,2201,1568],{"class":1567},[1095,2203,1770],{"class":1571},[1095,2205,1568],{"class":1567},[1095,2207,1164],{"class":1116},[1095,2209,2210],{"class":1097,"line":1297},[1095,2211,1712],{"class":1136},[1095,2213,2214,2216,2219],{"class":1097,"line":1321},[1095,2215,2141],{"class":1717},[1095,2217,2218],{"class":1136}," select_related_fields",[1095,2220,1730],{"class":1116},[1095,2222,2223,2226,2228,2231,2233,2235,2237,2240,2243],{"class":1097,"line":1326},[1095,2224,2225],{"class":1136},"        queryset ",[1095,2227,1140],{"class":1116},[1095,2229,2230],{"class":1136}," queryset",[1095,2232,1124],{"class":1116},[1095,2234,1032],{"class":1148},[1095,2236,1117],{"class":1116},[1095,2238,2239],{"class":2073},"*",[1095,2241,2242],{"class":1148},"select_related_fields",[1095,2244,1164],{"class":1116},[1095,2246,2247],{"class":1097,"line":1344},[1095,2248,1712],{"class":1136},[1095,2250,2251,2254],{"class":1097,"line":1369},[1095,2252,2253],{"class":1717},"    return",[1095,2255,2256],{"class":1136}," queryset\n",[1095,2258,2259],{"class":1097,"line":1385},[1095,2260,1213],{"emptyLinePlaceholder":1212},[1095,2262,2263],{"class":1097,"line":1423},[1095,2264,2265],{"class":1101},"# Usage\n",[1095,2267,2268,2271,2273,2275],{"class":1097,"line":1456},[1095,2269,2270],{"class":1136},"articles_with_author ",[1095,2272,1140],{"class":1116},[1095,2274,2064],{"class":1148},[1095,2276,1953],{"class":1116},[1095,2278,2279,2282,2284,2286,2288],{"class":1097,"line":1478},[1095,2280,2281],{"class":1154},"    include_author",[1095,2283,1140],{"class":1116},[1095,2285,1501],{"class":1500},[1095,2287,1405],{"class":1116},[1095,2289,2290],{"class":1148}," \n",[1095,2292,2293,2296,2298],{"class":1097,"line":1506},[1095,2294,2295],{"class":1154},"    include_category",[1095,2297,1140],{"class":1116},[1095,2299,2300],{"class":1500},"False\n",[1095,2302,2303],{"class":1097,"line":1511},[1095,2304,1164],{"class":1116},[1044,2306,2308],{"id":2307},"select-related-with-filtering","Select Related with Filtering",[1086,2310,2312],{"className":1088,"code":2311,"language":1090,"meta":1091,"style":1091},"# Select related works with filtering\nrecent_articles = Article.objects.select_related(\n    'author', 'category'\n).filter(\n    created_at__gte=timezone.now() - timedelta(days=30),\n    author__is_active=True,\n    category__is_published=True\n).order_by('-created_at')\n\n# The JOIN allows filtering on related fields efficiently\npublished_articles = Article.objects.select_related('author').filter(\n    author__is_staff=False,\n    is_published=True\n)\n",[1030,2313,2314,2319,2338,2355,2364,2400,2411,2421,2439,2443,2448,2479,2491,2500],{"__ignoreMap":1091},[1095,2315,2316],{"class":1097,"line":1098},[1095,2317,2318],{"class":1101},"# Select related works with filtering\n",[1095,2320,2321,2324,2326,2328,2330,2332,2334,2336],{"class":1097,"line":1105},[1095,2322,2323],{"class":1136},"recent_articles ",[1095,2325,1140],{"class":1116},[1095,2327,1331],{"class":1136},[1095,2329,1124],{"class":1116},[1095,2331,1690],{"class":1689},[1095,2333,1124],{"class":1116},[1095,2335,1032],{"class":1148},[1095,2337,1953],{"class":1116},[1095,2339,2340,2342,2344,2346,2348,2350,2352],{"class":1097,"line":1133},[1095,2341,1958],{"class":1567},[1095,2343,1746],{"class":1571},[1095,2345,1568],{"class":1567},[1095,2347,1405],{"class":1116},[1095,2349,1835],{"class":1567},[1095,2351,1770],{"class":1571},[1095,2353,2354],{"class":1567},"'\n",[1095,2356,2357,2359,2362],{"class":1097,"line":1167},[1095,2358,1842],{"class":1116},[1095,2360,2361],{"class":1148},"filter",[1095,2363,1953],{"class":1116},[1095,2365,2366,2369,2371,2374,2376,2379,2382,2385,2388,2390,2393,2395,2397],{"class":1097,"line":1191},[1095,2367,2368],{"class":1154},"    created_at__gte",[1095,2370,1140],{"class":1116},[1095,2372,2373],{"class":1148},"timezone",[1095,2375,1124],{"class":1116},[1095,2377,2378],{"class":1148},"now",[1095,2380,2381],{"class":1116},"()",[1095,2383,2384],{"class":2073}," -",[1095,2386,2387],{"class":1148}," timedelta",[1095,2389,1117],{"class":1116},[1095,2391,2392],{"class":1154},"days",[1095,2394,1140],{"class":1116},[1095,2396,1316],{"class":1160},[1095,2398,2399],{"class":1116},"),\n",[1095,2401,2402,2405,2407,2409],{"class":1097,"line":1209},[1095,2403,2404],{"class":1154},"    author__is_active",[1095,2406,1140],{"class":1116},[1095,2408,1501],{"class":1500},[1095,2410,1965],{"class":1116},[1095,2412,2413,2416,2418],{"class":1097,"line":1216},[1095,2414,2415],{"class":1154},"    category__is_published",[1095,2417,1140],{"class":1116},[1095,2419,2420],{"class":1500},"True\n",[1095,2422,2423,2425,2428,2430,2432,2435,2437],{"class":1097,"line":1234},[1095,2424,1842],{"class":1116},[1095,2426,2427],{"class":1148},"order_by",[1095,2429,1117],{"class":1116},[1095,2431,1568],{"class":1567},[1095,2433,2434],{"class":1571},"-created_at",[1095,2436,1568],{"class":1567},[1095,2438,1164],{"class":1116},[1095,2440,2441],{"class":1097,"line":1258},[1095,2442,1213],{"emptyLinePlaceholder":1212},[1095,2444,2445],{"class":1097,"line":1274},[1095,2446,2447],{"class":1101},"# The JOIN allows filtering on related fields efficiently\n",[1095,2449,2450,2453,2455,2457,2459,2461,2463,2465,2467,2469,2471,2473,2475,2477],{"class":1097,"line":1279},[1095,2451,2452],{"class":1136},"published_articles ",[1095,2454,1140],{"class":1116},[1095,2456,1331],{"class":1136},[1095,2458,1124],{"class":1116},[1095,2460,1690],{"class":1689},[1095,2462,1124],{"class":1116},[1095,2464,1032],{"class":1148},[1095,2466,1117],{"class":1116},[1095,2468,1568],{"class":1567},[1095,2470,1746],{"class":1571},[1095,2472,1568],{"class":1567},[1095,2474,1842],{"class":1116},[1095,2476,2361],{"class":1148},[1095,2478,1953],{"class":1116},[1095,2480,2481,2484,2486,2489],{"class":1097,"line":1297},[1095,2482,2483],{"class":1154},"    author__is_staff",[1095,2485,1140],{"class":1116},[1095,2487,2488],{"class":1500},"False",[1095,2490,1965],{"class":1116},[1095,2492,2493,2496,2498],{"class":1097,"line":1321},[1095,2494,2495],{"class":1154},"    is_published",[1095,2497,1140],{"class":1116},[1095,2499,2420],{"class":1500},[1095,2501,2502],{"class":1097,"line":1326},[1095,2503,1164],{"class":1116},[1039,2505,2507],{"id":2506},"prefetch-related-deep-dive","Prefetch Related Deep Dive",[1044,2509,2511],{"id":2510},"basic-prefetch-related-usage","Basic Prefetch Related Usage",[1086,2513,2515],{"className":1088,"code":2514,"language":1090,"meta":1091,"style":1091},"# WITHOUT prefetch_related: N+1 queries\ndef bad_article_with_tags():\n    articles = Article.objects.all()[:10]  # 1 query\n    \n    for article in articles:\n        tags = list(article.tags.all())  # 10 additional queries\n        comments = list(article.comments.all())  # 10 additional queries\n    \n    # Total: 21 queries\n\n# WITH prefetch_related: 3 queries\ndef good_article_with_tags():\n    articles = Article.objects.prefetch_related('tags', 'comments').all()[:10]\n    # Query 1: Articles\n    # Query 2: All tags for these articles\n    # Query 3: All comments for these articles\n    \n    for article in articles:\n        tags = list(article.tags.all())     # No additional query\n        comments = list(article.comments.all())  # No additional query\n    \n    # Total: 3 queries\n",[1030,2516,2517,2522,2531,2555,2559,2571,2601,2626,2630,2634,2638,2643,2652,2695,2700,2705,2710,2714,2726,2750,2775,2779],{"__ignoreMap":1091},[1095,2518,2519],{"class":1097,"line":1098},[1095,2520,2521],{"class":1101},"# WITHOUT prefetch_related: N+1 queries\n",[1095,2523,2524,2526,2529],{"class":1097,"line":1105},[1095,2525,1668],{"class":1108},[1095,2527,2528],{"class":1671}," bad_article_with_tags",[1095,2530,1675],{"class":1116},[1095,2532,2533,2535,2537,2539,2541,2543,2545,2547,2549,2551,2553],{"class":1097,"line":1133},[1095,2534,1680],{"class":1136},[1095,2536,1140],{"class":1116},[1095,2538,1331],{"class":1136},[1095,2540,1124],{"class":1116},[1095,2542,1690],{"class":1689},[1095,2544,1124],{"class":1116},[1095,2546,1695],{"class":1148},[1095,2548,1698],{"class":1116},[1095,2550,1701],{"class":1160},[1095,2552,1704],{"class":1116},[1095,2554,1707],{"class":1101},[1095,2556,2557],{"class":1097,"line":1167},[1095,2558,1712],{"class":1136},[1095,2560,2561,2563,2565,2567,2569],{"class":1097,"line":1191},[1095,2562,1718],{"class":1717},[1095,2564,1721],{"class":1136},[1095,2566,1724],{"class":1717},[1095,2568,1727],{"class":1136},[1095,2570,1730],{"class":1116},[1095,2572,2573,2576,2578,2582,2584,2586,2588,2591,2593,2595,2598],{"class":1097,"line":1209},[1095,2574,2575],{"class":1136},"        tags ",[1095,2577,1140],{"class":1116},[1095,2579,2581],{"class":2580},"sa2tF"," list",[1095,2583,1117],{"class":1116},[1095,2585,1741],{"class":1148},[1095,2587,1124],{"class":1116},[1095,2589,2590],{"class":1689},"tags",[1095,2592,1124],{"class":1116},[1095,2594,1695],{"class":1148},[1095,2596,2597],{"class":1116},"())",[1095,2599,2600],{"class":1101},"  # 10 additional queries\n",[1095,2602,2603,2606,2608,2610,2612,2614,2616,2618,2620,2622,2624],{"class":1097,"line":1216},[1095,2604,2605],{"class":1136},"        comments ",[1095,2607,1140],{"class":1116},[1095,2609,2581],{"class":2580},[1095,2611,1117],{"class":1116},[1095,2613,1741],{"class":1148},[1095,2615,1124],{"class":1116},[1095,2617,1572],{"class":1689},[1095,2619,1124],{"class":1116},[1095,2621,1695],{"class":1148},[1095,2623,2597],{"class":1116},[1095,2625,2600],{"class":1101},[1095,2627,2628],{"class":1097,"line":1234},[1095,2629,1712],{"class":1136},[1095,2631,2632],{"class":1097,"line":1258},[1095,2633,1788],{"class":1101},[1095,2635,2636],{"class":1097,"line":1274},[1095,2637,1213],{"emptyLinePlaceholder":1212},[1095,2639,2640],{"class":1097,"line":1279},[1095,2641,2642],{"class":1101},"# WITH prefetch_related: 3 queries\n",[1095,2644,2645,2647,2650],{"class":1097,"line":1297},[1095,2646,1668],{"class":1108},[1095,2648,2649],{"class":1671}," good_article_with_tags",[1095,2651,1675],{"class":1116},[1095,2653,2654,2656,2658,2660,2662,2664,2666,2668,2670,2672,2674,2676,2678,2680,2682,2684,2686,2688,2690,2692],{"class":1097,"line":1321},[1095,2655,1680],{"class":1136},[1095,2657,1140],{"class":1116},[1095,2659,1331],{"class":1136},[1095,2661,1124],{"class":1116},[1095,2663,1690],{"class":1689},[1095,2665,1124],{"class":1116},[1095,2667,1036],{"class":1148},[1095,2669,1117],{"class":1116},[1095,2671,1568],{"class":1567},[1095,2673,2590],{"class":1571},[1095,2675,1568],{"class":1567},[1095,2677,1405],{"class":1116},[1095,2679,1835],{"class":1567},[1095,2681,1572],{"class":1571},[1095,2683,1568],{"class":1567},[1095,2685,1842],{"class":1116},[1095,2687,1695],{"class":1148},[1095,2689,1698],{"class":1116},[1095,2691,1701],{"class":1160},[1095,2693,2694],{"class":1116},"]\n",[1095,2696,2697],{"class":1097,"line":1326},[1095,2698,2699],{"class":1101},"    # Query 1: Articles\n",[1095,2701,2702],{"class":1097,"line":1344},[1095,2703,2704],{"class":1101},"    # Query 2: All tags for these articles\n",[1095,2706,2707],{"class":1097,"line":1369},[1095,2708,2709],{"class":1101},"    # Query 3: All comments for these articles\n",[1095,2711,2712],{"class":1097,"line":1385},[1095,2713,1712],{"class":1136},[1095,2715,2716,2718,2720,2722,2724],{"class":1097,"line":1423},[1095,2717,1718],{"class":1717},[1095,2719,1721],{"class":1136},[1095,2721,1724],{"class":1717},[1095,2723,1727],{"class":1136},[1095,2725,1730],{"class":1116},[1095,2727,2728,2730,2732,2734,2736,2738,2740,2742,2744,2746,2748],{"class":1097,"line":1456},[1095,2729,2575],{"class":1136},[1095,2731,1140],{"class":1116},[1095,2733,2581],{"class":2580},[1095,2735,1117],{"class":1116},[1095,2737,1741],{"class":1148},[1095,2739,1124],{"class":1116},[1095,2741,2590],{"class":1689},[1095,2743,1124],{"class":1116},[1095,2745,1695],{"class":1148},[1095,2747,2597],{"class":1116},[1095,2749,1889],{"class":1101},[1095,2751,2752,2754,2756,2758,2760,2762,2764,2766,2768,2770,2772],{"class":1097,"line":1478},[1095,2753,2605],{"class":1136},[1095,2755,1140],{"class":1116},[1095,2757,2581],{"class":2580},[1095,2759,1117],{"class":1116},[1095,2761,1741],{"class":1148},[1095,2763,1124],{"class":1116},[1095,2765,1572],{"class":1689},[1095,2767,1124],{"class":1116},[1095,2769,1695],{"class":1148},[1095,2771,2597],{"class":1116},[1095,2773,2774],{"class":1101},"  # No additional query\n",[1095,2776,2777],{"class":1097,"line":1506},[1095,2778,1712],{"class":1136},[1095,2780,2781],{"class":1097,"line":1511},[1095,2782,2783],{"class":1101},"    # Total: 3 queries\n",[1044,2785,2787],{"id":2786},"advanced-prefetch-with-custom-querysets","Advanced Prefetch with Custom QuerySets",[1086,2789,2791],{"className":1088,"code":2790,"language":1090,"meta":1091,"style":1091},"from django.db.models import Prefetch\n\n# Prefetch with custom filtering and ordering\narticles = Article.objects.prefetch_related(\n    Prefetch(\n        'comments',\n        queryset=Comment.objects.filter(is_approved=True).select_related('author'),\n        to_attr='approved_comments'\n    ),\n    Prefetch(\n        'tags',\n        queryset=Tag.objects.filter(is_active=True).order_by('name'),\n        to_attr='active_tags'\n    )\n).all()\n\n# Access the prefetched data\nfor article in articles:\n    # Use the custom attribute names\n    for comment in article.approved_comments:\n        print(f\"Comment by {comment.author.name}: {comment.content}\")\n    \n    for tag in article.active_tags:\n        print(f\"Tag: {tag.name}\")\n",[1030,2792,2793,2817,2821,2826,2844,2851,2862,2903,2917,2922,2928,2938,2977,2990,2995,3003,3007,3012,3025,3030,3048,3097,3101,3118],{"__ignoreMap":1091},[1095,2794,2795,2798,2801,2803,2806,2808,2811,2814],{"class":1097,"line":1098},[1095,2796,2797],{"class":1717},"from",[1095,2799,2800],{"class":1136}," django",[1095,2802,1124],{"class":1116},[1095,2804,2805],{"class":1136},"db",[1095,2807,1124],{"class":1116},[1095,2809,2810],{"class":1136},"models ",[1095,2812,2813],{"class":1717},"import",[1095,2815,2816],{"class":1136}," Prefetch\n",[1095,2818,2819],{"class":1097,"line":1105},[1095,2820,1213],{"emptyLinePlaceholder":1212},[1095,2822,2823],{"class":1097,"line":1133},[1095,2824,2825],{"class":1101},"# Prefetch with custom filtering and ordering\n",[1095,2827,2828,2830,2832,2834,2836,2838,2840,2842],{"class":1097,"line":1167},[1095,2829,1938],{"class":1136},[1095,2831,1140],{"class":1116},[1095,2833,1331],{"class":1136},[1095,2835,1124],{"class":1116},[1095,2837,1690],{"class":1689},[1095,2839,1124],{"class":1116},[1095,2841,1036],{"class":1148},[1095,2843,1953],{"class":1116},[1095,2845,2846,2849],{"class":1097,"line":1191},[1095,2847,2848],{"class":1148},"    Prefetch",[1095,2850,1953],{"class":1116},[1095,2852,2853,2856,2858,2860],{"class":1097,"line":1209},[1095,2854,2855],{"class":1567},"        '",[1095,2857,1572],{"class":1571},[1095,2859,1568],{"class":1567},[1095,2861,1965],{"class":1116},[1095,2863,2864,2867,2869,2872,2874,2876,2878,2880,2882,2885,2887,2889,2891,2893,2895,2897,2899,2901],{"class":1097,"line":1216},[1095,2865,2866],{"class":1154},"        queryset",[1095,2868,1140],{"class":1116},[1095,2870,2871],{"class":1148},"Comment",[1095,2873,1124],{"class":1116},[1095,2875,1690],{"class":1689},[1095,2877,1124],{"class":1116},[1095,2879,2361],{"class":1148},[1095,2881,1117],{"class":1116},[1095,2883,2884],{"class":1154},"is_approved",[1095,2886,1140],{"class":1116},[1095,2888,1501],{"class":1500},[1095,2890,1842],{"class":1116},[1095,2892,1032],{"class":1148},[1095,2894,1117],{"class":1116},[1095,2896,1568],{"class":1567},[1095,2898,1746],{"class":1571},[1095,2900,1568],{"class":1567},[1095,2902,2399],{"class":1116},[1095,2904,2905,2908,2910,2912,2915],{"class":1097,"line":1234},[1095,2906,2907],{"class":1154},"        to_attr",[1095,2909,1140],{"class":1116},[1095,2911,1568],{"class":1567},[1095,2913,2914],{"class":1571},"approved_comments",[1095,2916,2354],{"class":1567},[1095,2918,2919],{"class":1097,"line":1258},[1095,2920,2921],{"class":1116},"    ),\n",[1095,2923,2924,2926],{"class":1097,"line":1274},[1095,2925,2848],{"class":1148},[1095,2927,1953],{"class":1116},[1095,2929,2930,2932,2934,2936],{"class":1097,"line":1279},[1095,2931,2855],{"class":1567},[1095,2933,2590],{"class":1571},[1095,2935,1568],{"class":1567},[1095,2937,1965],{"class":1116},[1095,2939,2940,2942,2944,2946,2948,2950,2952,2954,2956,2959,2961,2963,2965,2967,2969,2971,2973,2975],{"class":1097,"line":1297},[1095,2941,2866],{"class":1154},[1095,2943,1140],{"class":1116},[1095,2945,1473],{"class":1148},[1095,2947,1124],{"class":1116},[1095,2949,1690],{"class":1689},[1095,2951,1124],{"class":1116},[1095,2953,2361],{"class":1148},[1095,2955,1117],{"class":1116},[1095,2957,2958],{"class":1154},"is_active",[1095,2960,1140],{"class":1116},[1095,2962,1501],{"class":1500},[1095,2964,1842],{"class":1116},[1095,2966,2427],{"class":1148},[1095,2968,1117],{"class":1116},[1095,2970,1568],{"class":1567},[1095,2972,1751],{"class":1571},[1095,2974,1568],{"class":1567},[1095,2976,2399],{"class":1116},[1095,2978,2979,2981,2983,2985,2988],{"class":1097,"line":1321},[1095,2980,2907],{"class":1154},[1095,2982,1140],{"class":1116},[1095,2984,1568],{"class":1567},[1095,2986,2987],{"class":1571},"active_tags",[1095,2989,2354],{"class":1567},[1095,2991,2992],{"class":1097,"line":1326},[1095,2993,2994],{"class":1116},"    )\n",[1095,2996,2997,2999,3001],{"class":1097,"line":1344},[1095,2998,1842],{"class":1116},[1095,3000,1695],{"class":1148},[1095,3002,1206],{"class":1116},[1095,3004,3005],{"class":1097,"line":1369},[1095,3006,1213],{"emptyLinePlaceholder":1212},[1095,3008,3009],{"class":1097,"line":1385},[1095,3010,3011],{"class":1101},"# Access the prefetched data\n",[1095,3013,3014,3017,3019,3021,3023],{"class":1097,"line":1423},[1095,3015,3016],{"class":1717},"for",[1095,3018,1721],{"class":1136},[1095,3020,1724],{"class":1717},[1095,3022,1727],{"class":1136},[1095,3024,1730],{"class":1116},[1095,3026,3027],{"class":1097,"line":1456},[1095,3028,3029],{"class":1101},"    # Use the custom attribute names\n",[1095,3031,3032,3034,3037,3039,3042,3044,3046],{"class":1097,"line":1478},[1095,3033,1718],{"class":1717},[1095,3035,3036],{"class":1136}," comment ",[1095,3038,1724],{"class":1717},[1095,3040,3041],{"class":1136}," article",[1095,3043,1124],{"class":1116},[1095,3045,2914],{"class":1689},[1095,3047,1730],{"class":1116},[1095,3049,3050,3052,3054,3057,3060,3064,3067,3069,3071,3073,3075,3078,3081,3083,3085,3087,3090,3092,3095],{"class":1097,"line":1506},[1095,3051,1736],{"class":1735},[1095,3053,1117],{"class":1116},[1095,3055,3056],{"class":1108},"f",[1095,3058,3059],{"class":1571},"\"Comment by ",[1095,3061,3063],{"class":3062},"s3h35","{",[1095,3065,3066],{"class":1148},"comment",[1095,3068,1124],{"class":1116},[1095,3070,1746],{"class":1689},[1095,3072,1124],{"class":1116},[1095,3074,1751],{"class":1689},[1095,3076,3077],{"class":3062},"}",[1095,3079,3080],{"class":1571},": ",[1095,3082,3063],{"class":3062},[1095,3084,3066],{"class":1148},[1095,3086,1124],{"class":1116},[1095,3088,3089],{"class":1689},"content",[1095,3091,3077],{"class":3062},[1095,3093,3094],{"class":1571},"\"",[1095,3096,1164],{"class":1116},[1095,3098,3099],{"class":1097,"line":1511},[1095,3100,1712],{"class":1136},[1095,3102,3103,3105,3108,3110,3112,3114,3116],{"class":1097,"line":1529},[1095,3104,1718],{"class":1717},[1095,3106,3107],{"class":1136}," tag ",[1095,3109,1724],{"class":1717},[1095,3111,3041],{"class":1136},[1095,3113,1124],{"class":1116},[1095,3115,2987],{"class":1689},[1095,3117,1730],{"class":1116},[1095,3119,3120,3122,3124,3126,3129,3131,3134,3136,3138,3140,3142],{"class":1097,"line":1579},[1095,3121,1736],{"class":1735},[1095,3123,1117],{"class":1116},[1095,3125,3056],{"class":1108},[1095,3127,3128],{"class":1571},"\"Tag: ",[1095,3130,3063],{"class":3062},[1095,3132,3133],{"class":1148},"tag",[1095,3135,1124],{"class":1116},[1095,3137,1751],{"class":1689},[1095,3139,3077],{"class":3062},[1095,3141,3094],{"class":1571},[1095,3143,1164],{"class":1116},[1044,3145,3147],{"id":3146},"nested-prefetching","Nested Prefetching",[1086,3149,3151],{"className":1088,"code":3150,"language":1090,"meta":1091,"style":1091},"# Prefetch related objects of related objects\narticles = Article.objects.prefetch_related(\n    'comments__author',           # Comments and their authors\n    'comments__author__profile',  # Author profiles\n    'tags',                       # Article tags\n    'author__articles'            # Other articles by the same author\n).all()\n\n# Complex nested prefetching\nusers = User.objects.prefetch_related(\n    'articles__tags',             # User's articles and their tags\n    'articles__comments__author', # Comments on user's articles and comment authors\n    'profile__social_links'       # User's profile and social links\n).all()\n",[1030,3152,3153,3158,3176,3190,3204,3217,3229,3237,3241,3246,3266,3280,3294,3306],{"__ignoreMap":1091},[1095,3154,3155],{"class":1097,"line":1098},[1095,3156,3157],{"class":1101},"# Prefetch related objects of related objects\n",[1095,3159,3160,3162,3164,3166,3168,3170,3172,3174],{"class":1097,"line":1105},[1095,3161,1938],{"class":1136},[1095,3163,1140],{"class":1116},[1095,3165,1331],{"class":1136},[1095,3167,1124],{"class":1116},[1095,3169,1690],{"class":1689},[1095,3171,1124],{"class":1116},[1095,3173,1036],{"class":1148},[1095,3175,1953],{"class":1116},[1095,3177,3178,3180,3183,3185,3187],{"class":1097,"line":1133},[1095,3179,1958],{"class":1567},[1095,3181,3182],{"class":1571},"comments__author",[1095,3184,1568],{"class":1567},[1095,3186,1405],{"class":1116},[1095,3188,3189],{"class":1101},"           # Comments and their authors\n",[1095,3191,3192,3194,3197,3199,3201],{"class":1097,"line":1167},[1095,3193,1958],{"class":1567},[1095,3195,3196],{"class":1571},"comments__author__profile",[1095,3198,1568],{"class":1567},[1095,3200,1405],{"class":1116},[1095,3202,3203],{"class":1101},"  # Author profiles\n",[1095,3205,3206,3208,3210,3212,3214],{"class":1097,"line":1191},[1095,3207,1958],{"class":1567},[1095,3209,2590],{"class":1571},[1095,3211,1568],{"class":1567},[1095,3213,1405],{"class":1116},[1095,3215,3216],{"class":1101},"                       # Article tags\n",[1095,3218,3219,3221,3224,3226],{"class":1097,"line":1209},[1095,3220,1958],{"class":1567},[1095,3222,3223],{"class":1571},"author__articles",[1095,3225,1568],{"class":1567},[1095,3227,3228],{"class":1101},"            # Other articles by the same author\n",[1095,3230,3231,3233,3235],{"class":1097,"line":1216},[1095,3232,1842],{"class":1116},[1095,3234,1695],{"class":1148},[1095,3236,1206],{"class":1116},[1095,3238,3239],{"class":1097,"line":1234},[1095,3240,1213],{"emptyLinePlaceholder":1212},[1095,3242,3243],{"class":1097,"line":1258},[1095,3244,3245],{"class":1101},"# Complex nested prefetching\n",[1095,3247,3248,3251,3253,3256,3258,3260,3262,3264],{"class":1097,"line":1274},[1095,3249,3250],{"class":1136},"users ",[1095,3252,1140],{"class":1116},[1095,3254,3255],{"class":1136}," User",[1095,3257,1124],{"class":1116},[1095,3259,1690],{"class":1689},[1095,3261,1124],{"class":1116},[1095,3263,1036],{"class":1148},[1095,3265,1953],{"class":1116},[1095,3267,3268,3270,3273,3275,3277],{"class":1097,"line":1279},[1095,3269,1958],{"class":1567},[1095,3271,3272],{"class":1571},"articles__tags",[1095,3274,1568],{"class":1567},[1095,3276,1405],{"class":1116},[1095,3278,3279],{"class":1101},"             # User's articles and their tags\n",[1095,3281,3282,3284,3287,3289,3291],{"class":1097,"line":1297},[1095,3283,1958],{"class":1567},[1095,3285,3286],{"class":1571},"articles__comments__author",[1095,3288,1568],{"class":1567},[1095,3290,1405],{"class":1116},[1095,3292,3293],{"class":1101}," # Comments on user's articles and comment authors\n",[1095,3295,3296,3298,3301,3303],{"class":1097,"line":1321},[1095,3297,1958],{"class":1567},[1095,3299,3300],{"class":1571},"profile__social_links",[1095,3302,1568],{"class":1567},[1095,3304,3305],{"class":1101},"       # User's profile and social links\n",[1095,3307,3308,3310,3312],{"class":1097,"line":1326},[1095,3309,1842],{"class":1116},[1095,3311,1695],{"class":1148},[1095,3313,1206],{"class":1116},[1044,3315,3317],{"id":3316},"prefetch-with-aggregations","Prefetch with Aggregations",[1086,3319,3321],{"className":1088,"code":3320,"language":1090,"meta":1091,"style":1091},"from django.db.models import Count, Avg\n\n# Prefetch with annotations\narticles = Article.objects.prefetch_related(\n    Prefetch(\n        'comments',\n        queryset=Comment.objects.annotate(\n            reply_count=Count('replies')\n        ).select_related('author')\n    )\n).annotate(\n    comment_count=Count('comments'),\n    avg_rating=Avg('ratings__score')\n).all()\n\n# Access annotated data\nfor article in articles:\n    print(f\"Article: {article.title}\")\n    print(f\"Total comments: {article.comment_count}\")\n    print(f\"Average rating: {article.avg_rating}\")\n    \n    for comment in article.comments.all():\n        print(f\"Comment with {comment.reply_count} replies\")\n",[1030,3322,3323,3347,3351,3356,3374,3380,3390,3409,3430,3447,3451,3459,3478,3499,3507,3511,3516,3528,3555,3581,3607,3611,3631],{"__ignoreMap":1091},[1095,3324,3325,3327,3329,3331,3333,3335,3337,3339,3342,3344],{"class":1097,"line":1098},[1095,3326,2797],{"class":1717},[1095,3328,2800],{"class":1136},[1095,3330,1124],{"class":1116},[1095,3332,2805],{"class":1136},[1095,3334,1124],{"class":1116},[1095,3336,2810],{"class":1136},[1095,3338,2813],{"class":1717},[1095,3340,3341],{"class":1136}," Count",[1095,3343,1405],{"class":1116},[1095,3345,3346],{"class":1136}," Avg\n",[1095,3348,3349],{"class":1097,"line":1105},[1095,3350,1213],{"emptyLinePlaceholder":1212},[1095,3352,3353],{"class":1097,"line":1133},[1095,3354,3355],{"class":1101},"# Prefetch with annotations\n",[1095,3357,3358,3360,3362,3364,3366,3368,3370,3372],{"class":1097,"line":1167},[1095,3359,1938],{"class":1136},[1095,3361,1140],{"class":1116},[1095,3363,1331],{"class":1136},[1095,3365,1124],{"class":1116},[1095,3367,1690],{"class":1689},[1095,3369,1124],{"class":1116},[1095,3371,1036],{"class":1148},[1095,3373,1953],{"class":1116},[1095,3375,3376,3378],{"class":1097,"line":1191},[1095,3377,2848],{"class":1148},[1095,3379,1953],{"class":1116},[1095,3381,3382,3384,3386,3388],{"class":1097,"line":1209},[1095,3383,2855],{"class":1567},[1095,3385,1572],{"class":1571},[1095,3387,1568],{"class":1567},[1095,3389,1965],{"class":1116},[1095,3391,3392,3394,3396,3398,3400,3402,3404,3407],{"class":1097,"line":1216},[1095,3393,2866],{"class":1154},[1095,3395,1140],{"class":1116},[1095,3397,2871],{"class":1148},[1095,3399,1124],{"class":1116},[1095,3401,1690],{"class":1689},[1095,3403,1124],{"class":1116},[1095,3405,3406],{"class":1148},"annotate",[1095,3408,1953],{"class":1116},[1095,3410,3411,3414,3416,3419,3421,3423,3426,3428],{"class":1097,"line":1234},[1095,3412,3413],{"class":1154},"            reply_count",[1095,3415,1140],{"class":1116},[1095,3417,3418],{"class":1148},"Count",[1095,3420,1117],{"class":1116},[1095,3422,1568],{"class":1567},[1095,3424,3425],{"class":1571},"replies",[1095,3427,1568],{"class":1567},[1095,3429,1164],{"class":1116},[1095,3431,3432,3435,3437,3439,3441,3443,3445],{"class":1097,"line":1258},[1095,3433,3434],{"class":1116},"        ).",[1095,3436,1032],{"class":1148},[1095,3438,1117],{"class":1116},[1095,3440,1568],{"class":1567},[1095,3442,1746],{"class":1571},[1095,3444,1568],{"class":1567},[1095,3446,1164],{"class":1116},[1095,3448,3449],{"class":1097,"line":1274},[1095,3450,2994],{"class":1116},[1095,3452,3453,3455,3457],{"class":1097,"line":1279},[1095,3454,1842],{"class":1116},[1095,3456,3406],{"class":1148},[1095,3458,1953],{"class":1116},[1095,3460,3461,3464,3466,3468,3470,3472,3474,3476],{"class":1097,"line":1297},[1095,3462,3463],{"class":1154},"    comment_count",[1095,3465,1140],{"class":1116},[1095,3467,3418],{"class":1148},[1095,3469,1117],{"class":1116},[1095,3471,1568],{"class":1567},[1095,3473,1572],{"class":1571},[1095,3475,1568],{"class":1567},[1095,3477,2399],{"class":1116},[1095,3479,3480,3483,3485,3488,3490,3492,3495,3497],{"class":1097,"line":1321},[1095,3481,3482],{"class":1154},"    avg_rating",[1095,3484,1140],{"class":1116},[1095,3486,3487],{"class":1148},"Avg",[1095,3489,1117],{"class":1116},[1095,3491,1568],{"class":1567},[1095,3493,3494],{"class":1571},"ratings__score",[1095,3496,1568],{"class":1567},[1095,3498,1164],{"class":1116},[1095,3500,3501,3503,3505],{"class":1097,"line":1326},[1095,3502,1842],{"class":1116},[1095,3504,1695],{"class":1148},[1095,3506,1206],{"class":1116},[1095,3508,3509],{"class":1097,"line":1344},[1095,3510,1213],{"emptyLinePlaceholder":1212},[1095,3512,3513],{"class":1097,"line":1369},[1095,3514,3515],{"class":1101},"# Access annotated data\n",[1095,3517,3518,3520,3522,3524,3526],{"class":1097,"line":1385},[1095,3519,3016],{"class":1717},[1095,3521,1721],{"class":1136},[1095,3523,1724],{"class":1717},[1095,3525,1727],{"class":1136},[1095,3527,1730],{"class":1116},[1095,3529,3530,3533,3535,3537,3540,3542,3544,3546,3549,3551,3553],{"class":1097,"line":1423},[1095,3531,3532],{"class":1735},"    print",[1095,3534,1117],{"class":1116},[1095,3536,3056],{"class":1108},[1095,3538,3539],{"class":1571},"\"Article: ",[1095,3541,3063],{"class":3062},[1095,3543,1741],{"class":1148},[1095,3545,1124],{"class":1116},[1095,3547,3548],{"class":1689},"title",[1095,3550,3077],{"class":3062},[1095,3552,3094],{"class":1571},[1095,3554,1164],{"class":1116},[1095,3556,3557,3559,3561,3563,3566,3568,3570,3572,3575,3577,3579],{"class":1097,"line":1456},[1095,3558,3532],{"class":1735},[1095,3560,1117],{"class":1116},[1095,3562,3056],{"class":1108},[1095,3564,3565],{"class":1571},"\"Total comments: ",[1095,3567,3063],{"class":3062},[1095,3569,1741],{"class":1148},[1095,3571,1124],{"class":1116},[1095,3573,3574],{"class":1689},"comment_count",[1095,3576,3077],{"class":3062},[1095,3578,3094],{"class":1571},[1095,3580,1164],{"class":1116},[1095,3582,3583,3585,3587,3589,3592,3594,3596,3598,3601,3603,3605],{"class":1097,"line":1478},[1095,3584,3532],{"class":1735},[1095,3586,1117],{"class":1116},[1095,3588,3056],{"class":1108},[1095,3590,3591],{"class":1571},"\"Average rating: ",[1095,3593,3063],{"class":3062},[1095,3595,1741],{"class":1148},[1095,3597,1124],{"class":1116},[1095,3599,3600],{"class":1689},"avg_rating",[1095,3602,3077],{"class":3062},[1095,3604,3094],{"class":1571},[1095,3606,1164],{"class":1116},[1095,3608,3609],{"class":1097,"line":1506},[1095,3610,1712],{"class":1136},[1095,3612,3613,3615,3617,3619,3621,3623,3625,3627,3629],{"class":1097,"line":1511},[1095,3614,1718],{"class":1717},[1095,3616,3036],{"class":1136},[1095,3618,1724],{"class":1717},[1095,3620,3041],{"class":1136},[1095,3622,1124],{"class":1116},[1095,3624,1572],{"class":1689},[1095,3626,1124],{"class":1116},[1095,3628,1695],{"class":1148},[1095,3630,1675],{"class":1116},[1095,3632,3633,3635,3637,3639,3642,3644,3646,3648,3651,3653,3656],{"class":1097,"line":1529},[1095,3634,1736],{"class":1735},[1095,3636,1117],{"class":1116},[1095,3638,3056],{"class":1108},[1095,3640,3641],{"class":1571},"\"Comment with ",[1095,3643,3063],{"class":3062},[1095,3645,3066],{"class":1148},[1095,3647,1124],{"class":1116},[1095,3649,3650],{"class":1689},"reply_count",[1095,3652,3077],{"class":3062},[1095,3654,3655],{"class":1571}," replies\"",[1095,3657,1164],{"class":1116},[1039,3659,3661],{"id":3660},"combining-select-related-and-prefetch-related","Combining Select Related and Prefetch Related",[1044,3663,3665],{"id":3664},"optimal-combination-strategies","Optimal Combination Strategies",[1086,3667,3669],{"className":1088,"code":3668,"language":1090,"meta":1091,"style":1091},"# Combine both for maximum efficiency\ndef optimized_article_view():\n    articles = Article.objects.select_related(\n        'author',           # ForeignKey - use select_related\n        'category',         # ForeignKey - use select_related\n        'author__profile'   # OneToOne through ForeignKey - use select_related\n    ).prefetch_related(\n        'tags',             # ManyToMany - use prefetch_related\n        'comments__author', # Reverse FK with nested - use prefetch_related\n        Prefetch(\n            'comments',\n            queryset=Comment.objects.filter(is_approved=True).select_related('author'),\n            to_attr='approved_comments'\n        )\n    ).all()\n    \n    return articles\n\n# This generates only 3-4 queries total regardless of result size:\n# 1. Articles with author, category, and profile JOINs\n# 2. Tags for all articles\n# 3. Approved comments with authors for all articles\n",[1030,3670,3671,3676,3685,3703,3716,3729,3740,3749,3762,3775,3782,3793,3832,3845,3850,3858,3862,3869,3873,3878,3883,3888],{"__ignoreMap":1091},[1095,3672,3673],{"class":1097,"line":1098},[1095,3674,3675],{"class":1101},"# Combine both for maximum efficiency\n",[1095,3677,3678,3680,3683],{"class":1097,"line":1105},[1095,3679,1668],{"class":1108},[1095,3681,3682],{"class":1671}," optimized_article_view",[1095,3684,1675],{"class":1116},[1095,3686,3687,3689,3691,3693,3695,3697,3699,3701],{"class":1097,"line":1133},[1095,3688,1680],{"class":1136},[1095,3690,1140],{"class":1116},[1095,3692,1331],{"class":1136},[1095,3694,1124],{"class":1116},[1095,3696,1690],{"class":1689},[1095,3698,1124],{"class":1116},[1095,3700,1032],{"class":1148},[1095,3702,1953],{"class":1116},[1095,3704,3705,3707,3709,3711,3713],{"class":1097,"line":1167},[1095,3706,2855],{"class":1567},[1095,3708,1746],{"class":1571},[1095,3710,1568],{"class":1567},[1095,3712,1405],{"class":1116},[1095,3714,3715],{"class":1101},"           # ForeignKey - use select_related\n",[1095,3717,3718,3720,3722,3724,3726],{"class":1097,"line":1191},[1095,3719,2855],{"class":1567},[1095,3721,1770],{"class":1571},[1095,3723,1568],{"class":1567},[1095,3725,1405],{"class":1116},[1095,3727,3728],{"class":1101},"         # ForeignKey - use select_related\n",[1095,3730,3731,3733,3735,3737],{"class":1097,"line":1209},[1095,3732,2855],{"class":1567},[1095,3734,1972],{"class":1571},[1095,3736,1568],{"class":1567},[1095,3738,3739],{"class":1101},"   # OneToOne through ForeignKey - use select_related\n",[1095,3741,3742,3745,3747],{"class":1097,"line":1216},[1095,3743,3744],{"class":1116},"    ).",[1095,3746,1036],{"class":1148},[1095,3748,1953],{"class":1116},[1095,3750,3751,3753,3755,3757,3759],{"class":1097,"line":1234},[1095,3752,2855],{"class":1567},[1095,3754,2590],{"class":1571},[1095,3756,1568],{"class":1567},[1095,3758,1405],{"class":1116},[1095,3760,3761],{"class":1101},"             # ManyToMany - use prefetch_related\n",[1095,3763,3764,3766,3768,3770,3772],{"class":1097,"line":1258},[1095,3765,2855],{"class":1567},[1095,3767,3182],{"class":1571},[1095,3769,1568],{"class":1567},[1095,3771,1405],{"class":1116},[1095,3773,3774],{"class":1101}," # Reverse FK with nested - use prefetch_related\n",[1095,3776,3777,3780],{"class":1097,"line":1274},[1095,3778,3779],{"class":1148},"        Prefetch",[1095,3781,1953],{"class":1116},[1095,3783,3784,3787,3789,3791],{"class":1097,"line":1279},[1095,3785,3786],{"class":1567},"            '",[1095,3788,1572],{"class":1571},[1095,3790,1568],{"class":1567},[1095,3792,1965],{"class":1116},[1095,3794,3795,3798,3800,3802,3804,3806,3808,3810,3812,3814,3816,3818,3820,3822,3824,3826,3828,3830],{"class":1097,"line":1297},[1095,3796,3797],{"class":1154},"            queryset",[1095,3799,1140],{"class":1116},[1095,3801,2871],{"class":1148},[1095,3803,1124],{"class":1116},[1095,3805,1690],{"class":1689},[1095,3807,1124],{"class":1116},[1095,3809,2361],{"class":1148},[1095,3811,1117],{"class":1116},[1095,3813,2884],{"class":1154},[1095,3815,1140],{"class":1116},[1095,3817,1501],{"class":1500},[1095,3819,1842],{"class":1116},[1095,3821,1032],{"class":1148},[1095,3823,1117],{"class":1116},[1095,3825,1568],{"class":1567},[1095,3827,1746],{"class":1571},[1095,3829,1568],{"class":1567},[1095,3831,2399],{"class":1116},[1095,3833,3834,3837,3839,3841,3843],{"class":1097,"line":1321},[1095,3835,3836],{"class":1154},"            to_attr",[1095,3838,1140],{"class":1116},[1095,3840,1568],{"class":1567},[1095,3842,2914],{"class":1571},[1095,3844,2354],{"class":1567},[1095,3846,3847],{"class":1097,"line":1326},[1095,3848,3849],{"class":1116},"        )\n",[1095,3851,3852,3854,3856],{"class":1097,"line":1344},[1095,3853,3744],{"class":1116},[1095,3855,1695],{"class":1148},[1095,3857,1206],{"class":1116},[1095,3859,3860],{"class":1097,"line":1369},[1095,3861,1712],{"class":1136},[1095,3863,3864,3866],{"class":1097,"line":1385},[1095,3865,2253],{"class":1717},[1095,3867,3868],{"class":1136}," articles\n",[1095,3870,3871],{"class":1097,"line":1423},[1095,3872,1213],{"emptyLinePlaceholder":1212},[1095,3874,3875],{"class":1097,"line":1456},[1095,3876,3877],{"class":1101},"# This generates only 3-4 queries total regardless of result size:\n",[1095,3879,3880],{"class":1097,"line":1478},[1095,3881,3882],{"class":1101},"# 1. Articles with author, category, and profile JOINs\n",[1095,3884,3885],{"class":1097,"line":1506},[1095,3886,3887],{"class":1101},"# 2. Tags for all articles\n",[1095,3889,3890],{"class":1097,"line":1511},[1095,3891,3892],{"class":1101},"# 3. Approved comments with authors for all articles\n",[1044,3894,3896],{"id":3895},"real-world-complex-example","Real-World Complex Example",[1086,3898,3900],{"className":1088,"code":3899,"language":1090,"meta":1091,"style":1091},"def get_blog_data_optimized():\n    \"\"\"Get comprehensive blog data with minimal queries\"\"\"\n    \n    # Get articles with all related data\n    articles = Article.objects.select_related(\n        'author',\n        'author__profile',\n        'category'\n    ).prefetch_related(\n        'tags',\n        Prefetch(\n            'comments',\n            queryset=Comment.objects.filter(\n                is_approved=True\n            ).select_related('author').order_by('-created_at'),\n            to_attr='approved_comments'\n        )\n    ).filter(\n        is_published=True\n    ).order_by('-created_at')[:20]\n    \n    # Get popular tags (separate query)\n    popular_tags = Tag.objects.annotate(\n        article_count=Count('article')\n    ).filter(\n        article_count__gt=0\n    ).order_by('-article_count')[:10]\n    \n    # Get recent comments (separate query)\n    recent_comments = Comment.objects.select_related(\n        'author', 'article'\n    ).filter(\n        is_approved=True\n    ).order_by('-created_at')[:5]\n    \n    return {\n        'articles': articles,\n        'popular_tags': popular_tags,\n        'recent_comments': recent_comments\n    }\n    \n    # Total queries: 5 (articles, tags, comments, popular_tags, recent_comments)\n    # Without optimization: 1 + 20*3 + 20*N + 10 + 5 = 76+ queries\n",[1030,3901,3902,3911,3920,3924,3929,3947,3957,3967,3975,3983,3993,3999,4009,4027,4036,4065,4077,4081,4089,4098,4120,4124,4129,4148,4167,4175,4185,4207,4212,4218,4238,4255,4264,4274,4296,4301,4309,4326,4343,4358,4364,4369,4375],{"__ignoreMap":1091},[1095,3903,3904,3906,3909],{"class":1097,"line":1098},[1095,3905,1668],{"class":1108},[1095,3907,3908],{"class":1671}," get_blog_data_optimized",[1095,3910,1675],{"class":1116},[1095,3912,3913,3915,3918],{"class":1097,"line":1105},[1095,3914,2092],{"class":2091},[1095,3916,3917],{"class":2095},"Get comprehensive blog data with minimal queries",[1095,3919,2099],{"class":2091},[1095,3921,3922],{"class":1097,"line":1133},[1095,3923,1712],{"class":1136},[1095,3925,3926],{"class":1097,"line":1167},[1095,3927,3928],{"class":1101},"    # Get articles with all related data\n",[1095,3930,3931,3933,3935,3937,3939,3941,3943,3945],{"class":1097,"line":1191},[1095,3932,1680],{"class":1136},[1095,3934,1140],{"class":1116},[1095,3936,1331],{"class":1136},[1095,3938,1124],{"class":1116},[1095,3940,1690],{"class":1689},[1095,3942,1124],{"class":1116},[1095,3944,1032],{"class":1148},[1095,3946,1953],{"class":1116},[1095,3948,3949,3951,3953,3955],{"class":1097,"line":1209},[1095,3950,2855],{"class":1567},[1095,3952,1746],{"class":1571},[1095,3954,1568],{"class":1567},[1095,3956,1965],{"class":1116},[1095,3958,3959,3961,3963,3965],{"class":1097,"line":1216},[1095,3960,2855],{"class":1567},[1095,3962,1972],{"class":1571},[1095,3964,1568],{"class":1567},[1095,3966,1965],{"class":1116},[1095,3968,3969,3971,3973],{"class":1097,"line":1234},[1095,3970,2855],{"class":1567},[1095,3972,1770],{"class":1571},[1095,3974,2354],{"class":1567},[1095,3976,3977,3979,3981],{"class":1097,"line":1258},[1095,3978,3744],{"class":1116},[1095,3980,1036],{"class":1148},[1095,3982,1953],{"class":1116},[1095,3984,3985,3987,3989,3991],{"class":1097,"line":1274},[1095,3986,2855],{"class":1567},[1095,3988,2590],{"class":1571},[1095,3990,1568],{"class":1567},[1095,3992,1965],{"class":1116},[1095,3994,3995,3997],{"class":1097,"line":1279},[1095,3996,3779],{"class":1148},[1095,3998,1953],{"class":1116},[1095,4000,4001,4003,4005,4007],{"class":1097,"line":1297},[1095,4002,3786],{"class":1567},[1095,4004,1572],{"class":1571},[1095,4006,1568],{"class":1567},[1095,4008,1965],{"class":1116},[1095,4010,4011,4013,4015,4017,4019,4021,4023,4025],{"class":1097,"line":1321},[1095,4012,3797],{"class":1154},[1095,4014,1140],{"class":1116},[1095,4016,2871],{"class":1148},[1095,4018,1124],{"class":1116},[1095,4020,1690],{"class":1689},[1095,4022,1124],{"class":1116},[1095,4024,2361],{"class":1148},[1095,4026,1953],{"class":1116},[1095,4028,4029,4032,4034],{"class":1097,"line":1326},[1095,4030,4031],{"class":1154},"                is_approved",[1095,4033,1140],{"class":1116},[1095,4035,2420],{"class":1500},[1095,4037,4038,4041,4043,4045,4047,4049,4051,4053,4055,4057,4059,4061,4063],{"class":1097,"line":1344},[1095,4039,4040],{"class":1116},"            ).",[1095,4042,1032],{"class":1148},[1095,4044,1117],{"class":1116},[1095,4046,1568],{"class":1567},[1095,4048,1746],{"class":1571},[1095,4050,1568],{"class":1567},[1095,4052,1842],{"class":1116},[1095,4054,2427],{"class":1148},[1095,4056,1117],{"class":1116},[1095,4058,1568],{"class":1567},[1095,4060,2434],{"class":1571},[1095,4062,1568],{"class":1567},[1095,4064,2399],{"class":1116},[1095,4066,4067,4069,4071,4073,4075],{"class":1097,"line":1369},[1095,4068,3836],{"class":1154},[1095,4070,1140],{"class":1116},[1095,4072,1568],{"class":1567},[1095,4074,2914],{"class":1571},[1095,4076,2354],{"class":1567},[1095,4078,4079],{"class":1097,"line":1385},[1095,4080,3849],{"class":1116},[1095,4082,4083,4085,4087],{"class":1097,"line":1423},[1095,4084,3744],{"class":1116},[1095,4086,2361],{"class":1148},[1095,4088,1953],{"class":1116},[1095,4090,4091,4094,4096],{"class":1097,"line":1456},[1095,4092,4093],{"class":1154},"        is_published",[1095,4095,1140],{"class":1116},[1095,4097,2420],{"class":1500},[1095,4099,4100,4102,4104,4106,4108,4110,4112,4115,4118],{"class":1097,"line":1478},[1095,4101,3744],{"class":1116},[1095,4103,2427],{"class":1148},[1095,4105,1117],{"class":1116},[1095,4107,1568],{"class":1567},[1095,4109,2434],{"class":1571},[1095,4111,1568],{"class":1567},[1095,4113,4114],{"class":1116},")[:",[1095,4116,4117],{"class":1160},"20",[1095,4119,2694],{"class":1116},[1095,4121,4122],{"class":1097,"line":1506},[1095,4123,1712],{"class":1136},[1095,4125,4126],{"class":1097,"line":1511},[1095,4127,4128],{"class":1101},"    # Get popular tags (separate query)\n",[1095,4130,4131,4134,4136,4138,4140,4142,4144,4146],{"class":1097,"line":1529},[1095,4132,4133],{"class":1136},"    popular_tags ",[1095,4135,1140],{"class":1116},[1095,4137,1284],{"class":1136},[1095,4139,1124],{"class":1116},[1095,4141,1690],{"class":1689},[1095,4143,1124],{"class":1116},[1095,4145,3406],{"class":1148},[1095,4147,1953],{"class":1116},[1095,4149,4150,4153,4155,4157,4159,4161,4163,4165],{"class":1097,"line":1579},[1095,4151,4152],{"class":1154},"        article_count",[1095,4154,1140],{"class":1116},[1095,4156,3418],{"class":1148},[1095,4158,1117],{"class":1116},[1095,4160,1568],{"class":1567},[1095,4162,1741],{"class":1571},[1095,4164,1568],{"class":1567},[1095,4166,1164],{"class":1116},[1095,4168,4169,4171,4173],{"class":1097,"line":1610},[1095,4170,3744],{"class":1116},[1095,4172,2361],{"class":1148},[1095,4174,1953],{"class":1116},[1095,4176,4177,4180,4182],{"class":1097,"line":1625},[1095,4178,4179],{"class":1154},"        article_count__gt",[1095,4181,1140],{"class":1116},[1095,4183,4184],{"class":1160},"0\n",[1095,4186,4188,4190,4192,4194,4196,4199,4201,4203,4205],{"class":1097,"line":4187},27,[1095,4189,3744],{"class":1116},[1095,4191,2427],{"class":1148},[1095,4193,1117],{"class":1116},[1095,4195,1568],{"class":1567},[1095,4197,4198],{"class":1571},"-article_count",[1095,4200,1568],{"class":1567},[1095,4202,4114],{"class":1116},[1095,4204,1701],{"class":1160},[1095,4206,2694],{"class":1116},[1095,4208,4210],{"class":1097,"line":4209},28,[1095,4211,1712],{"class":1136},[1095,4213,4215],{"class":1097,"line":4214},29,[1095,4216,4217],{"class":1101},"    # Get recent comments (separate query)\n",[1095,4219,4221,4224,4226,4228,4230,4232,4234,4236],{"class":1097,"line":4220},30,[1095,4222,4223],{"class":1136},"    recent_comments ",[1095,4225,1140],{"class":1116},[1095,4227,1516],{"class":1136},[1095,4229,1124],{"class":1116},[1095,4231,1690],{"class":1689},[1095,4233,1124],{"class":1116},[1095,4235,1032],{"class":1148},[1095,4237,1953],{"class":1116},[1095,4239,4241,4243,4245,4247,4249,4251,4253],{"class":1097,"line":4240},31,[1095,4242,2855],{"class":1567},[1095,4244,1746],{"class":1571},[1095,4246,1568],{"class":1567},[1095,4248,1405],{"class":1116},[1095,4250,1835],{"class":1567},[1095,4252,1741],{"class":1571},[1095,4254,2354],{"class":1567},[1095,4256,4258,4260,4262],{"class":1097,"line":4257},32,[1095,4259,3744],{"class":1116},[1095,4261,2361],{"class":1148},[1095,4263,1953],{"class":1116},[1095,4265,4267,4270,4272],{"class":1097,"line":4266},33,[1095,4268,4269],{"class":1154},"        is_approved",[1095,4271,1140],{"class":1116},[1095,4273,2420],{"class":1500},[1095,4275,4277,4279,4281,4283,4285,4287,4289,4291,4294],{"class":1097,"line":4276},34,[1095,4278,3744],{"class":1116},[1095,4280,2427],{"class":1148},[1095,4282,1117],{"class":1116},[1095,4284,1568],{"class":1567},[1095,4286,2434],{"class":1571},[1095,4288,1568],{"class":1567},[1095,4290,4114],{"class":1116},[1095,4292,4293],{"class":1160},"5",[1095,4295,2694],{"class":1116},[1095,4297,4299],{"class":1097,"line":4298},35,[1095,4300,1712],{"class":1136},[1095,4302,4304,4306],{"class":1097,"line":4303},36,[1095,4305,2253],{"class":1717},[1095,4307,4308],{"class":1116}," {\n",[1095,4310,4312,4314,4317,4319,4322,4324],{"class":1097,"line":4311},37,[1095,4313,2855],{"class":1567},[1095,4315,4316],{"class":1571},"articles",[1095,4318,1568],{"class":1567},[1095,4320,4321],{"class":1116},":",[1095,4323,1727],{"class":1136},[1095,4325,1965],{"class":1116},[1095,4327,4329,4331,4334,4336,4338,4341],{"class":1097,"line":4328},38,[1095,4330,2855],{"class":1567},[1095,4332,4333],{"class":1571},"popular_tags",[1095,4335,1568],{"class":1567},[1095,4337,4321],{"class":1116},[1095,4339,4340],{"class":1136}," popular_tags",[1095,4342,1965],{"class":1116},[1095,4344,4346,4348,4351,4353,4355],{"class":1097,"line":4345},39,[1095,4347,2855],{"class":1567},[1095,4349,4350],{"class":1571},"recent_comments",[1095,4352,1568],{"class":1567},[1095,4354,4321],{"class":1116},[1095,4356,4357],{"class":1136}," recent_comments\n",[1095,4359,4361],{"class":1097,"line":4360},40,[1095,4362,4363],{"class":1116},"    }\n",[1095,4365,4367],{"class":1097,"line":4366},41,[1095,4368,1712],{"class":1136},[1095,4370,4372],{"class":1097,"line":4371},42,[1095,4373,4374],{"class":1101},"    # Total queries: 5 (articles, tags, comments, popular_tags, recent_comments)\n",[1095,4376,4378],{"class":1097,"line":4377},43,[1095,4379,4380],{"class":1101},"    # Without optimization: 1 + 20*3 + 20*N + 10 + 5 = 76+ queries\n",[1039,4382,4384],{"id":4383},"performance-analysis-and-debugging","Performance Analysis and Debugging",[1044,4386,4388],{"id":4387},"query-analysis-tools","Query Analysis Tools",[1086,4390,4392],{"className":1088,"code":4391,"language":1090,"meta":1091,"style":1091},"from django.db import connection\nfrom django.test.utils import override_settings\n\n@override_settings(DEBUG=True)\ndef analyze_query_performance():\n    \"\"\"Analyze query performance with detailed logging\"\"\"\n    \n    # Clear previous queries\n    connection.queries_log.clear()\n    \n    # Execute your optimized query\n    articles = Article.objects.select_related(\n        'author', 'category'\n    ).prefetch_related(\n        'tags', 'comments__author'\n    ).all()[:10]\n    \n    # Force evaluation\n    for article in articles:\n        print(f\"Article: {article.title}\")\n        print(f\"Author: {article.author.name}\")\n        print(f\"Category: {article.category.name}\")\n        print(f\"Tags: {[tag.name for tag in article.tags.all()]}\")\n        print(f\"Comments: {len(article.comments.all())}\")\n        print(\"---\")\n    \n    # Analyze queries\n    print(f\"\\nTotal queries executed: {len(connection.queries)}\")\n    \n    for i, query in enumerate(connection.queries, 1):\n        print(f\"\\nQuery {i}:\")\n        print(f\"Time: {query['time']}s\")\n        print(f\"SQL: {query['sql'][:200]}...\")\n\n# Custom decorator for query counting\ndef count_queries(func):\n    \"\"\"Decorator to count queries executed by a function\"\"\"\n    def wrapper(*args, **kwargs):\n        initial_count = len(connection.queries)\n        result = func(*args, **kwargs)\n        final_count = len(connection.queries)\n        \n        print(f\"{func.__name__} executed {final_count - initial_count} queries\")\n        return result\n    \n    return wrapper\n\n@count_queries\ndef test_optimized_view():\n    articles = Article.objects.select_related('author').prefetch_related('tags').all()[:5]\n    return list(articles)\n",[1030,4393,4394,4410,4431,4435,4454,4463,4472,4476,4481,4498,4502,4507,4525,4541,4549,4565,4577,4581,4586,4598,4622,4651,4680,4728,4764,4779,4783,4788,4827,4831,4863,4890,4924,4962,4966,4971,4985,4994,5019,5039,5063,5082,5087,5130,5139,5144,5152,5157,5165,5175,5222],{"__ignoreMap":1091},[1095,4395,4396,4398,4400,4402,4405,4407],{"class":1097,"line":1098},[1095,4397,2797],{"class":1717},[1095,4399,2800],{"class":1136},[1095,4401,1124],{"class":1116},[1095,4403,4404],{"class":1136},"db ",[1095,4406,2813],{"class":1717},[1095,4408,4409],{"class":1136}," connection\n",[1095,4411,4412,4414,4416,4418,4421,4423,4426,4428],{"class":1097,"line":1105},[1095,4413,2797],{"class":1717},[1095,4415,2800],{"class":1136},[1095,4417,1124],{"class":1116},[1095,4419,4420],{"class":1136},"test",[1095,4422,1124],{"class":1116},[1095,4424,4425],{"class":1136},"utils ",[1095,4427,2813],{"class":1717},[1095,4429,4430],{"class":1136}," override_settings\n",[1095,4432,4433],{"class":1097,"line":1133},[1095,4434,1213],{"emptyLinePlaceholder":1212},[1095,4436,4437,4440,4443,4445,4448,4450,4452],{"class":1097,"line":1167},[1095,4438,4439],{"class":1116},"@",[1095,4441,4442],{"class":1671},"override_settings",[1095,4444,1117],{"class":1116},[1095,4446,4447],{"class":1154},"DEBUG",[1095,4449,1140],{"class":1116},[1095,4451,1501],{"class":1500},[1095,4453,1164],{"class":1116},[1095,4455,4456,4458,4461],{"class":1097,"line":1191},[1095,4457,1668],{"class":1108},[1095,4459,4460],{"class":1671}," analyze_query_performance",[1095,4462,1675],{"class":1116},[1095,4464,4465,4467,4470],{"class":1097,"line":1209},[1095,4466,2092],{"class":2091},[1095,4468,4469],{"class":2095},"Analyze query performance with detailed logging",[1095,4471,2099],{"class":2091},[1095,4473,4474],{"class":1097,"line":1216},[1095,4475,1712],{"class":1136},[1095,4477,4478],{"class":1097,"line":1234},[1095,4479,4480],{"class":1101},"    # Clear previous queries\n",[1095,4482,4483,4486,4488,4491,4493,4496],{"class":1097,"line":1258},[1095,4484,4485],{"class":1136},"    connection",[1095,4487,1124],{"class":1116},[1095,4489,4490],{"class":1689},"queries_log",[1095,4492,1124],{"class":1116},[1095,4494,4495],{"class":1148},"clear",[1095,4497,1206],{"class":1116},[1095,4499,4500],{"class":1097,"line":1274},[1095,4501,1712],{"class":1136},[1095,4503,4504],{"class":1097,"line":1279},[1095,4505,4506],{"class":1101},"    # Execute your optimized query\n",[1095,4508,4509,4511,4513,4515,4517,4519,4521,4523],{"class":1097,"line":1297},[1095,4510,1680],{"class":1136},[1095,4512,1140],{"class":1116},[1095,4514,1331],{"class":1136},[1095,4516,1124],{"class":1116},[1095,4518,1690],{"class":1689},[1095,4520,1124],{"class":1116},[1095,4522,1032],{"class":1148},[1095,4524,1953],{"class":1116},[1095,4526,4527,4529,4531,4533,4535,4537,4539],{"class":1097,"line":1321},[1095,4528,2855],{"class":1567},[1095,4530,1746],{"class":1571},[1095,4532,1568],{"class":1567},[1095,4534,1405],{"class":1116},[1095,4536,1835],{"class":1567},[1095,4538,1770],{"class":1571},[1095,4540,2354],{"class":1567},[1095,4542,4543,4545,4547],{"class":1097,"line":1326},[1095,4544,3744],{"class":1116},[1095,4546,1036],{"class":1148},[1095,4548,1953],{"class":1116},[1095,4550,4551,4553,4555,4557,4559,4561,4563],{"class":1097,"line":1344},[1095,4552,2855],{"class":1567},[1095,4554,2590],{"class":1571},[1095,4556,1568],{"class":1567},[1095,4558,1405],{"class":1116},[1095,4560,1835],{"class":1567},[1095,4562,3182],{"class":1571},[1095,4564,2354],{"class":1567},[1095,4566,4567,4569,4571,4573,4575],{"class":1097,"line":1369},[1095,4568,3744],{"class":1116},[1095,4570,1695],{"class":1148},[1095,4572,1698],{"class":1116},[1095,4574,1701],{"class":1160},[1095,4576,2694],{"class":1116},[1095,4578,4579],{"class":1097,"line":1385},[1095,4580,1712],{"class":1136},[1095,4582,4583],{"class":1097,"line":1423},[1095,4584,4585],{"class":1101},"    # Force evaluation\n",[1095,4587,4588,4590,4592,4594,4596],{"class":1097,"line":1456},[1095,4589,1718],{"class":1717},[1095,4591,1721],{"class":1136},[1095,4593,1724],{"class":1717},[1095,4595,1727],{"class":1136},[1095,4597,1730],{"class":1116},[1095,4599,4600,4602,4604,4606,4608,4610,4612,4614,4616,4618,4620],{"class":1097,"line":1478},[1095,4601,1736],{"class":1735},[1095,4603,1117],{"class":1116},[1095,4605,3056],{"class":1108},[1095,4607,3539],{"class":1571},[1095,4609,3063],{"class":3062},[1095,4611,1741],{"class":1148},[1095,4613,1124],{"class":1116},[1095,4615,3548],{"class":1689},[1095,4617,3077],{"class":3062},[1095,4619,3094],{"class":1571},[1095,4621,1164],{"class":1116},[1095,4623,4624,4626,4628,4630,4633,4635,4637,4639,4641,4643,4645,4647,4649],{"class":1097,"line":1506},[1095,4625,1736],{"class":1735},[1095,4627,1117],{"class":1116},[1095,4629,3056],{"class":1108},[1095,4631,4632],{"class":1571},"\"Author: ",[1095,4634,3063],{"class":3062},[1095,4636,1741],{"class":1148},[1095,4638,1124],{"class":1116},[1095,4640,1746],{"class":1689},[1095,4642,1124],{"class":1116},[1095,4644,1751],{"class":1689},[1095,4646,3077],{"class":3062},[1095,4648,3094],{"class":1571},[1095,4650,1164],{"class":1116},[1095,4652,4653,4655,4657,4659,4662,4664,4666,4668,4670,4672,4674,4676,4678],{"class":1097,"line":1511},[1095,4654,1736],{"class":1735},[1095,4656,1117],{"class":1116},[1095,4658,3056],{"class":1108},[1095,4660,4661],{"class":1571},"\"Category: ",[1095,4663,3063],{"class":3062},[1095,4665,1741],{"class":1148},[1095,4667,1124],{"class":1116},[1095,4669,1770],{"class":1689},[1095,4671,1124],{"class":1116},[1095,4673,1751],{"class":1689},[1095,4675,3077],{"class":3062},[1095,4677,3094],{"class":1571},[1095,4679,1164],{"class":1116},[1095,4681,4682,4684,4686,4688,4691,4693,4696,4698,4700,4702,4705,4707,4709,4711,4713,4715,4717,4719,4722,4724,4726],{"class":1097,"line":1529},[1095,4683,1736],{"class":1735},[1095,4685,1117],{"class":1116},[1095,4687,3056],{"class":1108},[1095,4689,4690],{"class":1571},"\"Tags: ",[1095,4692,3063],{"class":3062},[1095,4694,4695],{"class":1116},"[",[1095,4697,3133],{"class":1148},[1095,4699,1124],{"class":1116},[1095,4701,1751],{"class":1689},[1095,4703,4704],{"class":1717}," for",[1095,4706,3107],{"class":1148},[1095,4708,1724],{"class":1717},[1095,4710,3041],{"class":1148},[1095,4712,1124],{"class":1116},[1095,4714,2590],{"class":1689},[1095,4716,1124],{"class":1116},[1095,4718,1695],{"class":1148},[1095,4720,4721],{"class":1116},"()]",[1095,4723,3077],{"class":3062},[1095,4725,3094],{"class":1571},[1095,4727,1164],{"class":1116},[1095,4729,4730,4732,4734,4736,4739,4741,4744,4746,4748,4750,4752,4754,4756,4758,4760,4762],{"class":1097,"line":1579},[1095,4731,1736],{"class":1735},[1095,4733,1117],{"class":1116},[1095,4735,3056],{"class":1108},[1095,4737,4738],{"class":1571},"\"Comments: ",[1095,4740,3063],{"class":3062},[1095,4742,4743],{"class":1735},"len",[1095,4745,1117],{"class":1116},[1095,4747,1741],{"class":1148},[1095,4749,1124],{"class":1116},[1095,4751,1572],{"class":1689},[1095,4753,1124],{"class":1116},[1095,4755,1695],{"class":1148},[1095,4757,2597],{"class":1116},[1095,4759,3077],{"class":3062},[1095,4761,3094],{"class":1571},[1095,4763,1164],{"class":1116},[1095,4765,4766,4768,4770,4772,4775,4777],{"class":1097,"line":1610},[1095,4767,1736],{"class":1735},[1095,4769,1117],{"class":1116},[1095,4771,3094],{"class":1567},[1095,4773,4774],{"class":1571},"---",[1095,4776,3094],{"class":1567},[1095,4778,1164],{"class":1116},[1095,4780,4781],{"class":1097,"line":1625},[1095,4782,1712],{"class":1136},[1095,4784,4785],{"class":1097,"line":4187},[1095,4786,4787],{"class":1101},"    # Analyze queries\n",[1095,4789,4790,4792,4794,4796,4798,4802,4805,4807,4809,4811,4814,4816,4819,4821,4823,4825],{"class":1097,"line":4209},[1095,4791,3532],{"class":1735},[1095,4793,1117],{"class":1116},[1095,4795,3056],{"class":1108},[1095,4797,3094],{"class":1571},[1095,4799,4801],{"class":4800},"se3Ec","\\n",[1095,4803,4804],{"class":1571},"Total queries executed: ",[1095,4806,3063],{"class":3062},[1095,4808,4743],{"class":1735},[1095,4810,1117],{"class":1116},[1095,4812,4813],{"class":1148},"connection",[1095,4815,1124],{"class":1116},[1095,4817,4818],{"class":1689},"queries",[1095,4820,1754],{"class":1116},[1095,4822,3077],{"class":3062},[1095,4824,3094],{"class":1571},[1095,4826,1164],{"class":1116},[1095,4828,4829],{"class":1097,"line":4214},[1095,4830,1712],{"class":1136},[1095,4832,4833,4835,4838,4840,4843,4845,4848,4850,4852,4854,4856,4858,4861],{"class":1097,"line":4220},[1095,4834,1718],{"class":1717},[1095,4836,4837],{"class":1136}," i",[1095,4839,1405],{"class":1116},[1095,4841,4842],{"class":1136}," query ",[1095,4844,1724],{"class":1717},[1095,4846,4847],{"class":1735}," enumerate",[1095,4849,1117],{"class":1116},[1095,4851,4813],{"class":1148},[1095,4853,1124],{"class":1116},[1095,4855,4818],{"class":1689},[1095,4857,1405],{"class":1116},[1095,4859,4860],{"class":1160}," 1",[1095,4862,1130],{"class":1116},[1095,4864,4865,4867,4869,4871,4873,4875,4878,4880,4883,4885,4888],{"class":1097,"line":4240},[1095,4866,1736],{"class":1735},[1095,4868,1117],{"class":1116},[1095,4870,3056],{"class":1108},[1095,4872,3094],{"class":1571},[1095,4874,4801],{"class":4800},[1095,4876,4877],{"class":1571},"Query ",[1095,4879,3063],{"class":3062},[1095,4881,4882],{"class":1148},"i",[1095,4884,3077],{"class":3062},[1095,4886,4887],{"class":1571},":\"",[1095,4889,1164],{"class":1116},[1095,4891,4892,4894,4896,4898,4901,4903,4906,4908,4910,4913,4915,4917,4919,4922],{"class":1097,"line":4257},[1095,4893,1736],{"class":1735},[1095,4895,1117],{"class":1116},[1095,4897,3056],{"class":1108},[1095,4899,4900],{"class":1571},"\"Time: ",[1095,4902,3063],{"class":3062},[1095,4904,4905],{"class":1148},"query",[1095,4907,4695],{"class":1116},[1095,4909,1568],{"class":1567},[1095,4911,4912],{"class":1571},"time",[1095,4914,1568],{"class":1567},[1095,4916,1704],{"class":1116},[1095,4918,3077],{"class":3062},[1095,4920,4921],{"class":1571},"s\"",[1095,4923,1164],{"class":1116},[1095,4925,4926,4928,4930,4932,4935,4937,4939,4941,4943,4946,4948,4951,4953,4955,4957,4960],{"class":1097,"line":4266},[1095,4927,1736],{"class":1735},[1095,4929,1117],{"class":1116},[1095,4931,3056],{"class":1108},[1095,4933,4934],{"class":1571},"\"SQL: ",[1095,4936,3063],{"class":3062},[1095,4938,4905],{"class":1148},[1095,4940,4695],{"class":1116},[1095,4942,1568],{"class":1567},[1095,4944,4945],{"class":1571},"sql",[1095,4947,1568],{"class":1567},[1095,4949,4950],{"class":1116},"][:",[1095,4952,1364],{"class":1160},[1095,4954,1704],{"class":1116},[1095,4956,3077],{"class":3062},[1095,4958,4959],{"class":1571},"...\"",[1095,4961,1164],{"class":1116},[1095,4963,4964],{"class":1097,"line":4276},[1095,4965,1213],{"emptyLinePlaceholder":1212},[1095,4967,4968],{"class":1097,"line":4298},[1095,4969,4970],{"class":1101},"# Custom decorator for query counting\n",[1095,4972,4973,4975,4978,4980,4983],{"class":1097,"line":4303},[1095,4974,1668],{"class":1108},[1095,4976,4977],{"class":1671}," count_queries",[1095,4979,1117],{"class":1116},[1095,4981,4982],{"class":2069},"func",[1095,4984,1130],{"class":1116},[1095,4986,4987,4989,4992],{"class":1097,"line":4311},[1095,4988,2092],{"class":2091},[1095,4990,4991],{"class":2095},"Decorator to count queries executed by a function",[1095,4993,2099],{"class":2091},[1095,4995,4996,4999,5002,5004,5006,5009,5011,5014,5017],{"class":1097,"line":4328},[1095,4997,4998],{"class":1108},"    def",[1095,5000,5001],{"class":1671}," wrapper",[1095,5003,1117],{"class":1116},[1095,5005,2239],{"class":2073},[1095,5007,5008],{"class":2069},"args",[1095,5010,1405],{"class":1116},[1095,5012,5013],{"class":2073}," **",[1095,5015,5016],{"class":2069},"kwargs",[1095,5018,1130],{"class":1116},[1095,5020,5021,5024,5026,5029,5031,5033,5035,5037],{"class":1097,"line":4345},[1095,5022,5023],{"class":1136},"        initial_count ",[1095,5025,1140],{"class":1116},[1095,5027,5028],{"class":1735}," len",[1095,5030,1117],{"class":1116},[1095,5032,4813],{"class":1148},[1095,5034,1124],{"class":1116},[1095,5036,4818],{"class":1689},[1095,5038,1164],{"class":1116},[1095,5040,5041,5044,5046,5049,5051,5053,5055,5057,5059,5061],{"class":1097,"line":4360},[1095,5042,5043],{"class":1136},"        result ",[1095,5045,1140],{"class":1116},[1095,5047,5048],{"class":1148}," func",[1095,5050,1117],{"class":1116},[1095,5052,2239],{"class":2073},[1095,5054,5008],{"class":1148},[1095,5056,1405],{"class":1116},[1095,5058,5013],{"class":2073},[1095,5060,5016],{"class":1148},[1095,5062,1164],{"class":1116},[1095,5064,5065,5068,5070,5072,5074,5076,5078,5080],{"class":1097,"line":4366},[1095,5066,5067],{"class":1136},"        final_count ",[1095,5069,1140],{"class":1116},[1095,5071,5028],{"class":1735},[1095,5073,1117],{"class":1116},[1095,5075,4813],{"class":1148},[1095,5077,1124],{"class":1116},[1095,5079,4818],{"class":1689},[1095,5081,1164],{"class":1116},[1095,5083,5084],{"class":1097,"line":4371},[1095,5085,5086],{"class":1136},"        \n",[1095,5088,5089,5091,5093,5095,5097,5099,5101,5103,5107,5109,5112,5114,5117,5120,5123,5125,5128],{"class":1097,"line":4377},[1095,5090,1736],{"class":1735},[1095,5092,1117],{"class":1116},[1095,5094,3056],{"class":1108},[1095,5096,3094],{"class":1571},[1095,5098,3063],{"class":3062},[1095,5100,4982],{"class":1148},[1095,5102,1124],{"class":1116},[1095,5104,5106],{"class":5105},"s131V","__name__",[1095,5108,3077],{"class":3062},[1095,5110,5111],{"class":1571}," executed ",[1095,5113,3063],{"class":3062},[1095,5115,5116],{"class":1148},"final_count ",[1095,5118,5119],{"class":2073},"-",[1095,5121,5122],{"class":1148}," initial_count",[1095,5124,3077],{"class":3062},[1095,5126,5127],{"class":1571}," queries\"",[1095,5129,1164],{"class":1116},[1095,5131,5133,5136],{"class":1097,"line":5132},44,[1095,5134,5135],{"class":1717},"        return",[1095,5137,5138],{"class":1136}," result\n",[1095,5140,5142],{"class":1097,"line":5141},45,[1095,5143,1712],{"class":1136},[1095,5145,5147,5149],{"class":1097,"line":5146},46,[1095,5148,2253],{"class":1717},[1095,5150,5151],{"class":1136}," wrapper\n",[1095,5153,5155],{"class":1097,"line":5154},47,[1095,5156,1213],{"emptyLinePlaceholder":1212},[1095,5158,5160,5162],{"class":1097,"line":5159},48,[1095,5161,4439],{"class":1116},[1095,5163,5164],{"class":1671},"count_queries\n",[1095,5166,5168,5170,5173],{"class":1097,"line":5167},49,[1095,5169,1668],{"class":1108},[1095,5171,5172],{"class":1671}," test_optimized_view",[1095,5174,1675],{"class":1116},[1095,5176,5178,5180,5182,5184,5186,5188,5190,5192,5194,5196,5198,5200,5202,5204,5206,5208,5210,5212,5214,5216,5218,5220],{"class":1097,"line":5177},50,[1095,5179,1680],{"class":1136},[1095,5181,1140],{"class":1116},[1095,5183,1331],{"class":1136},[1095,5185,1124],{"class":1116},[1095,5187,1690],{"class":1689},[1095,5189,1124],{"class":1116},[1095,5191,1032],{"class":1148},[1095,5193,1117],{"class":1116},[1095,5195,1568],{"class":1567},[1095,5197,1746],{"class":1571},[1095,5199,1568],{"class":1567},[1095,5201,1842],{"class":1116},[1095,5203,1036],{"class":1148},[1095,5205,1117],{"class":1116},[1095,5207,1568],{"class":1567},[1095,5209,2590],{"class":1571},[1095,5211,1568],{"class":1567},[1095,5213,1842],{"class":1116},[1095,5215,1695],{"class":1148},[1095,5217,1698],{"class":1116},[1095,5219,4293],{"class":1160},[1095,5221,2694],{"class":1116},[1095,5223,5225,5227,5229,5231,5233],{"class":1097,"line":5224},51,[1095,5226,2253],{"class":1717},[1095,5228,2581],{"class":2580},[1095,5230,1117],{"class":1116},[1095,5232,4316],{"class":1148},[1095,5234,1164],{"class":1116},[1044,5236,5238],{"id":5237},"performance-comparison-testing","Performance Comparison Testing",[1086,5240,5242],{"className":1088,"code":5241,"language":1090,"meta":1091,"style":1091},"import time\nfrom django.test import TestCase\n\nclass SelectRelatedPerformanceTest(TestCase):\n    def setUp(self):\n        # Create test data\n        authors = [Author.objects.create(name=f\"Author {i}\") for i in range(10)]\n        categories = [Category.objects.create(name=f\"Category {i}\") for i in range(5)]\n        tags = [Tag.objects.create(name=f\"Tag {i}\") for i in range(20)]\n        \n        for i in range(100):\n            article = Article.objects.create(\n                title=f\"Article {i}\",\n                content=f\"Content for article {i}\",\n                author=authors[i % 10],\n                category=categories[i % 5]\n            )\n            article.tags.set(tags[i % 5:(i % 5) + 3])  # 3 tags per article\n    \n    def test_without_optimization(self):\n        \"\"\"Test performance without select_related/prefetch_related\"\"\"\n        start_time = time.time()\n        \n        articles = Article.objects.all()[:20]\n        data = []\n        \n        for article in articles:\n            data.append({\n                'title': article.title,\n                'author': article.author.name,\n                'category': article.category.name,\n                'tags': [tag.name for tag in article.tags.all()]\n            })\n        \n        end_time = time.time()\n        unoptimized_time = end_time - start_time\n        unoptimized_queries = len(connection.queries)\n        \n        print(f\"Unoptimized: {unoptimized_time:.4f}s, {unoptimized_queries} queries\")\n        return unoptimized_time, unoptimized_queries\n    \n    def test_with_optimization(self):\n        \"\"\"Test performance with select_related/prefetch_related\"\"\"\n        start_time = time.time()\n        \n        articles = Article.objects.select_related(\n            'author', 'category'\n        ).prefetch_related('tags').all()[:20]\n        \n        data = []\n        for article in articles:\n            data.append({\n                'title': article.title,\n                'author': article.author.name,\n                'category': article.category.name,\n                'tags': [tag.name for tag in article.tags.all()]\n            })\n        \n        end_time = time.time()\n        optimized_time = end_time - start_time\n        optimized_queries = len(connection.queries)\n        \n        print(f\"Optimized: {optimized_time:.4f}s, {optimized_queries} queries\")\n        return optimized_time, optimized_queries\n    \n    def test_performance_comparison(self):\n        \"\"\"Compare optimized vs unoptimized performance\"\"\"\n        # Reset queries\n        connection.queries_log.clear()\n        \n        unopt_time, unopt_queries = self.test_without_optimization()\n        \n        connection.queries_log.clear()\n        \n        opt_time, opt_queries = self.test_with_optimization()\n        \n        # Calculate improvements\n        time_improvement = (unopt_time - opt_time) / unopt_time * 100\n        query_improvement = (unopt_queries - opt_queries) / unopt_queries * 100\n        \n        print(f\"\\nPerformance Improvement:\")\n        print(f\"Time: {time_improvement:.1f}% faster\")\n        print(f\"Queries: {query_improvement:.1f}% fewer queries\")\n        \n        # Assert significant improvement\n        self.assertGreater(time_improvement, 50, \"Should be at least 50% faster\")\n        self.assertGreater(query_improvement, 80, \"Should use at least 80% fewer queries\")\n",[1030,5243,5244,5251,5267,5271,5285,5300,5305,5364,5418,5471,5475,5492,5511,5533,5555,5579,5600,5605,5654,5658,5671,5681,5697,5701,5724,5733,5737,5749,5761,5780,5802,5824,5861,5866,5870,5885,5900,5919,5923,5958,5970,5974,5987,5996,6010,6014,6032,6048,6072,6076,6084,6096,6107,6126,6149,6172,6209,6214,6219,6234,6248,6268,6273,6307,6320,6325,6339,6349,6355,6371,6376,6399,6404,6419,6424,6446,6451,6457,6489,6517,6522,6540,6566,6592,6597,6603,6641],{"__ignoreMap":1091},[1095,5245,5246,5248],{"class":1097,"line":1098},[1095,5247,2813],{"class":1717},[1095,5249,5250],{"class":1136}," time\n",[1095,5252,5253,5255,5257,5259,5262,5264],{"class":1097,"line":1105},[1095,5254,2797],{"class":1717},[1095,5256,2800],{"class":1136},[1095,5258,1124],{"class":1116},[1095,5260,5261],{"class":1136},"test ",[1095,5263,2813],{"class":1717},[1095,5265,5266],{"class":1136}," TestCase\n",[1095,5268,5269],{"class":1097,"line":1133},[1095,5270,1213],{"emptyLinePlaceholder":1212},[1095,5272,5273,5275,5278,5280,5283],{"class":1097,"line":1167},[1095,5274,1109],{"class":1108},[1095,5276,5277],{"class":1112}," SelectRelatedPerformanceTest",[1095,5279,1117],{"class":1116},[1095,5281,5282],{"class":1120},"TestCase",[1095,5284,1130],{"class":1116},[1095,5286,5287,5289,5292,5294,5298],{"class":1097,"line":1191},[1095,5288,4998],{"class":1108},[1095,5290,5291],{"class":1671}," setUp",[1095,5293,1117],{"class":1116},[1095,5295,5297],{"class":5296},"sRjD_","self",[1095,5299,1130],{"class":1116},[1095,5301,5302],{"class":1097,"line":1209},[1095,5303,5304],{"class":1101},"        # Create test data\n",[1095,5306,5307,5310,5312,5315,5317,5319,5321,5323,5326,5328,5330,5332,5334,5337,5339,5341,5343,5345,5347,5349,5352,5354,5357,5359,5361],{"class":1097,"line":1216},[1095,5308,5309],{"class":1136},"        authors ",[1095,5311,1140],{"class":1116},[1095,5313,5314],{"class":1116}," [",[1095,5316,1402],{"class":1136},[1095,5318,1124],{"class":1116},[1095,5320,1690],{"class":1689},[1095,5322,1124],{"class":1116},[1095,5324,5325],{"class":1148},"create",[1095,5327,1117],{"class":1116},[1095,5329,1751],{"class":1154},[1095,5331,1140],{"class":1116},[1095,5333,3056],{"class":1108},[1095,5335,5336],{"class":1571},"\"Author ",[1095,5338,3063],{"class":3062},[1095,5340,4882],{"class":1148},[1095,5342,3077],{"class":3062},[1095,5344,3094],{"class":1571},[1095,5346,1754],{"class":1116},[1095,5348,4704],{"class":1717},[1095,5350,5351],{"class":1136}," i ",[1095,5353,1724],{"class":1717},[1095,5355,5356],{"class":1735}," range",[1095,5358,1117],{"class":1116},[1095,5360,1701],{"class":1160},[1095,5362,5363],{"class":1116},")]\n",[1095,5365,5366,5369,5371,5373,5375,5377,5379,5381,5383,5385,5387,5389,5391,5394,5396,5398,5400,5402,5404,5406,5408,5410,5412,5414,5416],{"class":1097,"line":1234},[1095,5367,5368],{"class":1136},"        categories ",[1095,5370,1140],{"class":1116},[1095,5372,5314],{"class":1116},[1095,5374,1439],{"class":1136},[1095,5376,1124],{"class":1116},[1095,5378,1690],{"class":1689},[1095,5380,1124],{"class":1116},[1095,5382,5325],{"class":1148},[1095,5384,1117],{"class":1116},[1095,5386,1751],{"class":1154},[1095,5388,1140],{"class":1116},[1095,5390,3056],{"class":1108},[1095,5392,5393],{"class":1571},"\"Category ",[1095,5395,3063],{"class":3062},[1095,5397,4882],{"class":1148},[1095,5399,3077],{"class":3062},[1095,5401,3094],{"class":1571},[1095,5403,1754],{"class":1116},[1095,5405,4704],{"class":1717},[1095,5407,5351],{"class":1136},[1095,5409,1724],{"class":1717},[1095,5411,5356],{"class":1735},[1095,5413,1117],{"class":1116},[1095,5415,4293],{"class":1160},[1095,5417,5363],{"class":1116},[1095,5419,5420,5422,5424,5426,5428,5430,5432,5434,5436,5438,5440,5442,5444,5447,5449,5451,5453,5455,5457,5459,5461,5463,5465,5467,5469],{"class":1097,"line":1258},[1095,5421,2575],{"class":1136},[1095,5423,1140],{"class":1116},[1095,5425,5314],{"class":1116},[1095,5427,1473],{"class":1136},[1095,5429,1124],{"class":1116},[1095,5431,1690],{"class":1689},[1095,5433,1124],{"class":1116},[1095,5435,5325],{"class":1148},[1095,5437,1117],{"class":1116},[1095,5439,1751],{"class":1154},[1095,5441,1140],{"class":1116},[1095,5443,3056],{"class":1108},[1095,5445,5446],{"class":1571},"\"Tag ",[1095,5448,3063],{"class":3062},[1095,5450,4882],{"class":1148},[1095,5452,3077],{"class":3062},[1095,5454,3094],{"class":1571},[1095,5456,1754],{"class":1116},[1095,5458,4704],{"class":1717},[1095,5460,5351],{"class":1136},[1095,5462,1724],{"class":1717},[1095,5464,5356],{"class":1735},[1095,5466,1117],{"class":1116},[1095,5468,4117],{"class":1160},[1095,5470,5363],{"class":1116},[1095,5472,5473],{"class":1097,"line":1274},[1095,5474,5086],{"class":1136},[1095,5476,5477,5480,5482,5484,5486,5488,5490],{"class":1097,"line":1279},[1095,5478,5479],{"class":1717},"        for",[1095,5481,5351],{"class":1136},[1095,5483,1724],{"class":1717},[1095,5485,5356],{"class":1735},[1095,5487,1117],{"class":1116},[1095,5489,1161],{"class":1160},[1095,5491,1130],{"class":1116},[1095,5493,5494,5497,5499,5501,5503,5505,5507,5509],{"class":1097,"line":1297},[1095,5495,5496],{"class":1136},"            article ",[1095,5498,1140],{"class":1116},[1095,5500,1331],{"class":1136},[1095,5502,1124],{"class":1116},[1095,5504,1690],{"class":1689},[1095,5506,1124],{"class":1116},[1095,5508,5325],{"class":1148},[1095,5510,1953],{"class":1116},[1095,5512,5513,5516,5518,5520,5523,5525,5527,5529,5531],{"class":1097,"line":1321},[1095,5514,5515],{"class":1154},"                title",[1095,5517,1140],{"class":1116},[1095,5519,3056],{"class":1108},[1095,5521,5522],{"class":1571},"\"Article ",[1095,5524,3063],{"class":3062},[1095,5526,4882],{"class":1148},[1095,5528,3077],{"class":3062},[1095,5530,3094],{"class":1571},[1095,5532,1965],{"class":1116},[1095,5534,5535,5538,5540,5542,5545,5547,5549,5551,5553],{"class":1097,"line":1326},[1095,5536,5537],{"class":1154},"                content",[1095,5539,1140],{"class":1116},[1095,5541,3056],{"class":1108},[1095,5543,5544],{"class":1571},"\"Content for article ",[1095,5546,3063],{"class":3062},[1095,5548,4882],{"class":1148},[1095,5550,3077],{"class":3062},[1095,5552,3094],{"class":1571},[1095,5554,1965],{"class":1116},[1095,5556,5557,5560,5562,5565,5567,5570,5573,5576],{"class":1097,"line":1344},[1095,5558,5559],{"class":1154},"                author",[1095,5561,1140],{"class":1116},[1095,5563,5564],{"class":1148},"authors",[1095,5566,4695],{"class":1116},[1095,5568,5569],{"class":1148},"i ",[1095,5571,5572],{"class":2073},"%",[1095,5574,5575],{"class":1160}," 10",[1095,5577,5578],{"class":1116},"],\n",[1095,5580,5581,5584,5586,5589,5591,5593,5595,5598],{"class":1097,"line":1369},[1095,5582,5583],{"class":1154},"                category",[1095,5585,1140],{"class":1116},[1095,5587,5588],{"class":1148},"categories",[1095,5590,4695],{"class":1116},[1095,5592,5569],{"class":1148},[1095,5594,5572],{"class":2073},[1095,5596,5597],{"class":1160}," 5",[1095,5599,2694],{"class":1116},[1095,5601,5602],{"class":1097,"line":1385},[1095,5603,5604],{"class":1116},"            )\n",[1095,5606,5607,5610,5612,5614,5616,5619,5621,5623,5625,5627,5629,5631,5634,5636,5638,5640,5642,5645,5648,5651],{"class":1097,"line":1423},[1095,5608,5609],{"class":1136},"            article",[1095,5611,1124],{"class":1116},[1095,5613,2590],{"class":1689},[1095,5615,1124],{"class":1116},[1095,5617,5618],{"class":1148},"set",[1095,5620,1117],{"class":1116},[1095,5622,2590],{"class":1148},[1095,5624,4695],{"class":1116},[1095,5626,5569],{"class":1148},[1095,5628,5572],{"class":2073},[1095,5630,5597],{"class":1160},[1095,5632,5633],{"class":1116},":(",[1095,5635,5569],{"class":1148},[1095,5637,5572],{"class":2073},[1095,5639,5597],{"class":1160},[1095,5641,1754],{"class":1116},[1095,5643,5644],{"class":2073}," +",[1095,5646,5647],{"class":1160}," 3",[1095,5649,5650],{"class":1116},"])",[1095,5652,5653],{"class":1101},"  # 3 tags per article\n",[1095,5655,5656],{"class":1097,"line":1456},[1095,5657,1712],{"class":1136},[1095,5659,5660,5662,5665,5667,5669],{"class":1097,"line":1478},[1095,5661,4998],{"class":1108},[1095,5663,5664],{"class":1671}," test_without_optimization",[1095,5666,1117],{"class":1116},[1095,5668,5297],{"class":5296},[1095,5670,1130],{"class":1116},[1095,5672,5673,5676,5679],{"class":1097,"line":1506},[1095,5674,5675],{"class":2091},"        \"\"\"",[1095,5677,5678],{"class":2095},"Test performance without select_related/prefetch_related",[1095,5680,2099],{"class":2091},[1095,5682,5683,5686,5688,5691,5693,5695],{"class":1097,"line":1511},[1095,5684,5685],{"class":1136},"        start_time ",[1095,5687,1140],{"class":1116},[1095,5689,5690],{"class":1136}," time",[1095,5692,1124],{"class":1116},[1095,5694,4912],{"class":1148},[1095,5696,1206],{"class":1116},[1095,5698,5699],{"class":1097,"line":1529},[1095,5700,5086],{"class":1136},[1095,5702,5703,5706,5708,5710,5712,5714,5716,5718,5720,5722],{"class":1097,"line":1579},[1095,5704,5705],{"class":1136},"        articles ",[1095,5707,1140],{"class":1116},[1095,5709,1331],{"class":1136},[1095,5711,1124],{"class":1116},[1095,5713,1690],{"class":1689},[1095,5715,1124],{"class":1116},[1095,5717,1695],{"class":1148},[1095,5719,1698],{"class":1116},[1095,5721,4117],{"class":1160},[1095,5723,2694],{"class":1116},[1095,5725,5726,5729,5731],{"class":1097,"line":1610},[1095,5727,5728],{"class":1136},"        data ",[1095,5730,1140],{"class":1116},[1095,5732,2132],{"class":1116},[1095,5734,5735],{"class":1097,"line":1625},[1095,5736,5086],{"class":1136},[1095,5738,5739,5741,5743,5745,5747],{"class":1097,"line":4187},[1095,5740,5479],{"class":1717},[1095,5742,1721],{"class":1136},[1095,5744,1724],{"class":1717},[1095,5746,1727],{"class":1136},[1095,5748,1730],{"class":1116},[1095,5750,5751,5754,5756,5758],{"class":1097,"line":4209},[1095,5752,5753],{"class":1136},"            data",[1095,5755,1124],{"class":1116},[1095,5757,2197],{"class":1148},[1095,5759,5760],{"class":1116},"({\n",[1095,5762,5763,5766,5768,5770,5772,5774,5776,5778],{"class":1097,"line":4214},[1095,5764,5765],{"class":1567},"                '",[1095,5767,3548],{"class":1571},[1095,5769,1568],{"class":1567},[1095,5771,4321],{"class":1116},[1095,5773,3041],{"class":1148},[1095,5775,1124],{"class":1116},[1095,5777,3548],{"class":1689},[1095,5779,1965],{"class":1116},[1095,5781,5782,5784,5786,5788,5790,5792,5794,5796,5798,5800],{"class":1097,"line":4220},[1095,5783,5765],{"class":1567},[1095,5785,1746],{"class":1571},[1095,5787,1568],{"class":1567},[1095,5789,4321],{"class":1116},[1095,5791,3041],{"class":1148},[1095,5793,1124],{"class":1116},[1095,5795,1746],{"class":1689},[1095,5797,1124],{"class":1116},[1095,5799,1751],{"class":1689},[1095,5801,1965],{"class":1116},[1095,5803,5804,5806,5808,5810,5812,5814,5816,5818,5820,5822],{"class":1097,"line":4240},[1095,5805,5765],{"class":1567},[1095,5807,1770],{"class":1571},[1095,5809,1568],{"class":1567},[1095,5811,4321],{"class":1116},[1095,5813,3041],{"class":1148},[1095,5815,1124],{"class":1116},[1095,5817,1770],{"class":1689},[1095,5819,1124],{"class":1116},[1095,5821,1751],{"class":1689},[1095,5823,1965],{"class":1116},[1095,5825,5826,5828,5830,5832,5834,5836,5838,5840,5842,5844,5846,5848,5850,5852,5854,5856,5858],{"class":1097,"line":4257},[1095,5827,5765],{"class":1567},[1095,5829,2590],{"class":1571},[1095,5831,1568],{"class":1567},[1095,5833,4321],{"class":1116},[1095,5835,5314],{"class":1116},[1095,5837,3133],{"class":1148},[1095,5839,1124],{"class":1116},[1095,5841,1751],{"class":1689},[1095,5843,4704],{"class":1717},[1095,5845,3107],{"class":1148},[1095,5847,1724],{"class":1717},[1095,5849,3041],{"class":1148},[1095,5851,1124],{"class":1116},[1095,5853,2590],{"class":1689},[1095,5855,1124],{"class":1116},[1095,5857,1695],{"class":1148},[1095,5859,5860],{"class":1116},"()]\n",[1095,5862,5863],{"class":1097,"line":4266},[1095,5864,5865],{"class":1116},"            })\n",[1095,5867,5868],{"class":1097,"line":4276},[1095,5869,5086],{"class":1136},[1095,5871,5872,5875,5877,5879,5881,5883],{"class":1097,"line":4298},[1095,5873,5874],{"class":1136},"        end_time ",[1095,5876,1140],{"class":1116},[1095,5878,5690],{"class":1136},[1095,5880,1124],{"class":1116},[1095,5882,4912],{"class":1148},[1095,5884,1206],{"class":1116},[1095,5886,5887,5890,5892,5895,5897],{"class":1097,"line":4303},[1095,5888,5889],{"class":1136},"        unoptimized_time ",[1095,5891,1140],{"class":1116},[1095,5893,5894],{"class":1136}," end_time ",[1095,5896,5119],{"class":2073},[1095,5898,5899],{"class":1136}," start_time\n",[1095,5901,5902,5905,5907,5909,5911,5913,5915,5917],{"class":1097,"line":4311},[1095,5903,5904],{"class":1136},"        unoptimized_queries ",[1095,5906,1140],{"class":1116},[1095,5908,5028],{"class":1735},[1095,5910,1117],{"class":1116},[1095,5912,4813],{"class":1148},[1095,5914,1124],{"class":1116},[1095,5916,4818],{"class":1689},[1095,5918,1164],{"class":1116},[1095,5920,5921],{"class":1097,"line":4328},[1095,5922,5086],{"class":1136},[1095,5924,5925,5927,5929,5931,5934,5936,5939,5942,5944,5947,5949,5952,5954,5956],{"class":1097,"line":4345},[1095,5926,1736],{"class":1735},[1095,5928,1117],{"class":1116},[1095,5930,3056],{"class":1108},[1095,5932,5933],{"class":1571},"\"Unoptimized: ",[1095,5935,3063],{"class":3062},[1095,5937,5938],{"class":1148},"unoptimized_time",[1095,5940,5941],{"class":1108},":.4f",[1095,5943,3077],{"class":3062},[1095,5945,5946],{"class":1571},"s, ",[1095,5948,3063],{"class":3062},[1095,5950,5951],{"class":1148},"unoptimized_queries",[1095,5953,3077],{"class":3062},[1095,5955,5127],{"class":1571},[1095,5957,1164],{"class":1116},[1095,5959,5960,5962,5965,5967],{"class":1097,"line":4360},[1095,5961,5135],{"class":1717},[1095,5963,5964],{"class":1136}," unoptimized_time",[1095,5966,1405],{"class":1116},[1095,5968,5969],{"class":1136}," unoptimized_queries\n",[1095,5971,5972],{"class":1097,"line":4366},[1095,5973,1712],{"class":1136},[1095,5975,5976,5978,5981,5983,5985],{"class":1097,"line":4371},[1095,5977,4998],{"class":1108},[1095,5979,5980],{"class":1671}," test_with_optimization",[1095,5982,1117],{"class":1116},[1095,5984,5297],{"class":5296},[1095,5986,1130],{"class":1116},[1095,5988,5989,5991,5994],{"class":1097,"line":4377},[1095,5990,5675],{"class":2091},[1095,5992,5993],{"class":2095},"Test performance with select_related/prefetch_related",[1095,5995,2099],{"class":2091},[1095,5997,5998,6000,6002,6004,6006,6008],{"class":1097,"line":5132},[1095,5999,5685],{"class":1136},[1095,6001,1140],{"class":1116},[1095,6003,5690],{"class":1136},[1095,6005,1124],{"class":1116},[1095,6007,4912],{"class":1148},[1095,6009,1206],{"class":1116},[1095,6011,6012],{"class":1097,"line":5141},[1095,6013,5086],{"class":1136},[1095,6015,6016,6018,6020,6022,6024,6026,6028,6030],{"class":1097,"line":5146},[1095,6017,5705],{"class":1136},[1095,6019,1140],{"class":1116},[1095,6021,1331],{"class":1136},[1095,6023,1124],{"class":1116},[1095,6025,1690],{"class":1689},[1095,6027,1124],{"class":1116},[1095,6029,1032],{"class":1148},[1095,6031,1953],{"class":1116},[1095,6033,6034,6036,6038,6040,6042,6044,6046],{"class":1097,"line":5154},[1095,6035,3786],{"class":1567},[1095,6037,1746],{"class":1571},[1095,6039,1568],{"class":1567},[1095,6041,1405],{"class":1116},[1095,6043,1835],{"class":1567},[1095,6045,1770],{"class":1571},[1095,6047,2354],{"class":1567},[1095,6049,6050,6052,6054,6056,6058,6060,6062,6064,6066,6068,6070],{"class":1097,"line":5159},[1095,6051,3434],{"class":1116},[1095,6053,1036],{"class":1148},[1095,6055,1117],{"class":1116},[1095,6057,1568],{"class":1567},[1095,6059,2590],{"class":1571},[1095,6061,1568],{"class":1567},[1095,6063,1842],{"class":1116},[1095,6065,1695],{"class":1148},[1095,6067,1698],{"class":1116},[1095,6069,4117],{"class":1160},[1095,6071,2694],{"class":1116},[1095,6073,6074],{"class":1097,"line":5167},[1095,6075,5086],{"class":1136},[1095,6077,6078,6080,6082],{"class":1097,"line":5177},[1095,6079,5728],{"class":1136},[1095,6081,1140],{"class":1116},[1095,6083,2132],{"class":1116},[1095,6085,6086,6088,6090,6092,6094],{"class":1097,"line":5224},[1095,6087,5479],{"class":1717},[1095,6089,1721],{"class":1136},[1095,6091,1724],{"class":1717},[1095,6093,1727],{"class":1136},[1095,6095,1730],{"class":1116},[1095,6097,6099,6101,6103,6105],{"class":1097,"line":6098},52,[1095,6100,5753],{"class":1136},[1095,6102,1124],{"class":1116},[1095,6104,2197],{"class":1148},[1095,6106,5760],{"class":1116},[1095,6108,6110,6112,6114,6116,6118,6120,6122,6124],{"class":1097,"line":6109},53,[1095,6111,5765],{"class":1567},[1095,6113,3548],{"class":1571},[1095,6115,1568],{"class":1567},[1095,6117,4321],{"class":1116},[1095,6119,3041],{"class":1148},[1095,6121,1124],{"class":1116},[1095,6123,3548],{"class":1689},[1095,6125,1965],{"class":1116},[1095,6127,6129,6131,6133,6135,6137,6139,6141,6143,6145,6147],{"class":1097,"line":6128},54,[1095,6130,5765],{"class":1567},[1095,6132,1746],{"class":1571},[1095,6134,1568],{"class":1567},[1095,6136,4321],{"class":1116},[1095,6138,3041],{"class":1148},[1095,6140,1124],{"class":1116},[1095,6142,1746],{"class":1689},[1095,6144,1124],{"class":1116},[1095,6146,1751],{"class":1689},[1095,6148,1965],{"class":1116},[1095,6150,6152,6154,6156,6158,6160,6162,6164,6166,6168,6170],{"class":1097,"line":6151},55,[1095,6153,5765],{"class":1567},[1095,6155,1770],{"class":1571},[1095,6157,1568],{"class":1567},[1095,6159,4321],{"class":1116},[1095,6161,3041],{"class":1148},[1095,6163,1124],{"class":1116},[1095,6165,1770],{"class":1689},[1095,6167,1124],{"class":1116},[1095,6169,1751],{"class":1689},[1095,6171,1965],{"class":1116},[1095,6173,6175,6177,6179,6181,6183,6185,6187,6189,6191,6193,6195,6197,6199,6201,6203,6205,6207],{"class":1097,"line":6174},56,[1095,6176,5765],{"class":1567},[1095,6178,2590],{"class":1571},[1095,6180,1568],{"class":1567},[1095,6182,4321],{"class":1116},[1095,6184,5314],{"class":1116},[1095,6186,3133],{"class":1148},[1095,6188,1124],{"class":1116},[1095,6190,1751],{"class":1689},[1095,6192,4704],{"class":1717},[1095,6194,3107],{"class":1148},[1095,6196,1724],{"class":1717},[1095,6198,3041],{"class":1148},[1095,6200,1124],{"class":1116},[1095,6202,2590],{"class":1689},[1095,6204,1124],{"class":1116},[1095,6206,1695],{"class":1148},[1095,6208,5860],{"class":1116},[1095,6210,6212],{"class":1097,"line":6211},57,[1095,6213,5865],{"class":1116},[1095,6215,6217],{"class":1097,"line":6216},58,[1095,6218,5086],{"class":1136},[1095,6220,6222,6224,6226,6228,6230,6232],{"class":1097,"line":6221},59,[1095,6223,5874],{"class":1136},[1095,6225,1140],{"class":1116},[1095,6227,5690],{"class":1136},[1095,6229,1124],{"class":1116},[1095,6231,4912],{"class":1148},[1095,6233,1206],{"class":1116},[1095,6235,6237,6240,6242,6244,6246],{"class":1097,"line":6236},60,[1095,6238,6239],{"class":1136},"        optimized_time ",[1095,6241,1140],{"class":1116},[1095,6243,5894],{"class":1136},[1095,6245,5119],{"class":2073},[1095,6247,5899],{"class":1136},[1095,6249,6251,6254,6256,6258,6260,6262,6264,6266],{"class":1097,"line":6250},61,[1095,6252,6253],{"class":1136},"        optimized_queries ",[1095,6255,1140],{"class":1116},[1095,6257,5028],{"class":1735},[1095,6259,1117],{"class":1116},[1095,6261,4813],{"class":1148},[1095,6263,1124],{"class":1116},[1095,6265,4818],{"class":1689},[1095,6267,1164],{"class":1116},[1095,6269,6271],{"class":1097,"line":6270},62,[1095,6272,5086],{"class":1136},[1095,6274,6276,6278,6280,6282,6285,6287,6290,6292,6294,6296,6298,6301,6303,6305],{"class":1097,"line":6275},63,[1095,6277,1736],{"class":1735},[1095,6279,1117],{"class":1116},[1095,6281,3056],{"class":1108},[1095,6283,6284],{"class":1571},"\"Optimized: ",[1095,6286,3063],{"class":3062},[1095,6288,6289],{"class":1148},"optimized_time",[1095,6291,5941],{"class":1108},[1095,6293,3077],{"class":3062},[1095,6295,5946],{"class":1571},[1095,6297,3063],{"class":3062},[1095,6299,6300],{"class":1148},"optimized_queries",[1095,6302,3077],{"class":3062},[1095,6304,5127],{"class":1571},[1095,6306,1164],{"class":1116},[1095,6308,6310,6312,6315,6317],{"class":1097,"line":6309},64,[1095,6311,5135],{"class":1717},[1095,6313,6314],{"class":1136}," optimized_time",[1095,6316,1405],{"class":1116},[1095,6318,6319],{"class":1136}," optimized_queries\n",[1095,6321,6323],{"class":1097,"line":6322},65,[1095,6324,1712],{"class":1136},[1095,6326,6328,6330,6333,6335,6337],{"class":1097,"line":6327},66,[1095,6329,4998],{"class":1108},[1095,6331,6332],{"class":1671}," test_performance_comparison",[1095,6334,1117],{"class":1116},[1095,6336,5297],{"class":5296},[1095,6338,1130],{"class":1116},[1095,6340,6342,6344,6347],{"class":1097,"line":6341},67,[1095,6343,5675],{"class":2091},[1095,6345,6346],{"class":2095},"Compare optimized vs unoptimized performance",[1095,6348,2099],{"class":2091},[1095,6350,6352],{"class":1097,"line":6351},68,[1095,6353,6354],{"class":1101},"        # Reset queries\n",[1095,6356,6358,6361,6363,6365,6367,6369],{"class":1097,"line":6357},69,[1095,6359,6360],{"class":1136},"        connection",[1095,6362,1124],{"class":1116},[1095,6364,4490],{"class":1689},[1095,6366,1124],{"class":1116},[1095,6368,4495],{"class":1148},[1095,6370,1206],{"class":1116},[1095,6372,6374],{"class":1097,"line":6373},70,[1095,6375,5086],{"class":1136},[1095,6377,6379,6382,6384,6387,6389,6392,6394,6397],{"class":1097,"line":6378},71,[1095,6380,6381],{"class":1136},"        unopt_time",[1095,6383,1405],{"class":1116},[1095,6385,6386],{"class":1136}," unopt_queries ",[1095,6388,1140],{"class":1116},[1095,6390,6391],{"class":4800}," self",[1095,6393,1124],{"class":1116},[1095,6395,6396],{"class":1148},"test_without_optimization",[1095,6398,1206],{"class":1116},[1095,6400,6402],{"class":1097,"line":6401},72,[1095,6403,5086],{"class":1136},[1095,6405,6407,6409,6411,6413,6415,6417],{"class":1097,"line":6406},73,[1095,6408,6360],{"class":1136},[1095,6410,1124],{"class":1116},[1095,6412,4490],{"class":1689},[1095,6414,1124],{"class":1116},[1095,6416,4495],{"class":1148},[1095,6418,1206],{"class":1116},[1095,6420,6422],{"class":1097,"line":6421},74,[1095,6423,5086],{"class":1136},[1095,6425,6427,6430,6432,6435,6437,6439,6441,6444],{"class":1097,"line":6426},75,[1095,6428,6429],{"class":1136},"        opt_time",[1095,6431,1405],{"class":1116},[1095,6433,6434],{"class":1136}," opt_queries ",[1095,6436,1140],{"class":1116},[1095,6438,6391],{"class":4800},[1095,6440,1124],{"class":1116},[1095,6442,6443],{"class":1148},"test_with_optimization",[1095,6445,1206],{"class":1116},[1095,6447,6449],{"class":1097,"line":6448},76,[1095,6450,5086],{"class":1136},[1095,6452,6454],{"class":1097,"line":6453},77,[1095,6455,6456],{"class":1101},"        # Calculate improvements\n",[1095,6458,6460,6463,6465,6468,6471,6473,6476,6478,6481,6484,6486],{"class":1097,"line":6459},78,[1095,6461,6462],{"class":1136},"        time_improvement ",[1095,6464,1140],{"class":1116},[1095,6466,6467],{"class":1116}," (",[1095,6469,6470],{"class":1136},"unopt_time ",[1095,6472,5119],{"class":2073},[1095,6474,6475],{"class":1136}," opt_time",[1095,6477,1754],{"class":1116},[1095,6479,6480],{"class":2073}," /",[1095,6482,6483],{"class":1136}," unopt_time ",[1095,6485,2239],{"class":2073},[1095,6487,6488],{"class":1160}," 100\n",[1095,6490,6492,6495,6497,6499,6502,6504,6507,6509,6511,6513,6515],{"class":1097,"line":6491},79,[1095,6493,6494],{"class":1136},"        query_improvement ",[1095,6496,1140],{"class":1116},[1095,6498,6467],{"class":1116},[1095,6500,6501],{"class":1136},"unopt_queries ",[1095,6503,5119],{"class":2073},[1095,6505,6506],{"class":1136}," opt_queries",[1095,6508,1754],{"class":1116},[1095,6510,6480],{"class":2073},[1095,6512,6386],{"class":1136},[1095,6514,2239],{"class":2073},[1095,6516,6488],{"class":1160},[1095,6518,6520],{"class":1097,"line":6519},80,[1095,6521,5086],{"class":1136},[1095,6523,6525,6527,6529,6531,6533,6535,6538],{"class":1097,"line":6524},81,[1095,6526,1736],{"class":1735},[1095,6528,1117],{"class":1116},[1095,6530,3056],{"class":1108},[1095,6532,3094],{"class":1571},[1095,6534,4801],{"class":4800},[1095,6536,6537],{"class":1571},"Performance Improvement:\"",[1095,6539,1164],{"class":1116},[1095,6541,6543,6545,6547,6549,6551,6553,6556,6559,6561,6564],{"class":1097,"line":6542},82,[1095,6544,1736],{"class":1735},[1095,6546,1117],{"class":1116},[1095,6548,3056],{"class":1108},[1095,6550,4900],{"class":1571},[1095,6552,3063],{"class":3062},[1095,6554,6555],{"class":1148},"time_improvement",[1095,6557,6558],{"class":1108},":.1f",[1095,6560,3077],{"class":3062},[1095,6562,6563],{"class":1571},"% faster\"",[1095,6565,1164],{"class":1116},[1095,6567,6569,6571,6573,6575,6578,6580,6583,6585,6587,6590],{"class":1097,"line":6568},83,[1095,6570,1736],{"class":1735},[1095,6572,1117],{"class":1116},[1095,6574,3056],{"class":1108},[1095,6576,6577],{"class":1571},"\"Queries: ",[1095,6579,3063],{"class":3062},[1095,6581,6582],{"class":1148},"query_improvement",[1095,6584,6558],{"class":1108},[1095,6586,3077],{"class":3062},[1095,6588,6589],{"class":1571},"% fewer queries\"",[1095,6591,1164],{"class":1116},[1095,6593,6595],{"class":1097,"line":6594},84,[1095,6596,5086],{"class":1136},[1095,6598,6600],{"class":1097,"line":6599},85,[1095,6601,6602],{"class":1101},"        # Assert significant improvement\n",[1095,6604,6606,6609,6611,6614,6616,6618,6620,6623,6625,6628,6631,6634,6637,6639],{"class":1097,"line":6605},86,[1095,6607,6608],{"class":4800},"        self",[1095,6610,1124],{"class":1116},[1095,6612,6613],{"class":1148},"assertGreater",[1095,6615,1117],{"class":1116},[1095,6617,6555],{"class":1148},[1095,6619,1405],{"class":1116},[1095,6621,6622],{"class":1160}," 50",[1095,6624,1405],{"class":1116},[1095,6626,6627],{"class":1567}," \"",[1095,6629,6630],{"class":1571},"Should be at least 50",[1095,6632,6633],{"class":3062},"% f",[1095,6635,6636],{"class":1571},"aster",[1095,6638,3094],{"class":1567},[1095,6640,1164],{"class":1116},[1095,6642,6644,6646,6648,6650,6652,6654,6656,6659,6661,6663,6666,6668,6671,6673],{"class":1097,"line":6643},87,[1095,6645,6608],{"class":4800},[1095,6647,1124],{"class":1116},[1095,6649,6613],{"class":1148},[1095,6651,1117],{"class":1116},[1095,6653,6582],{"class":1148},[1095,6655,1405],{"class":1116},[1095,6657,6658],{"class":1160}," 80",[1095,6660,1405],{"class":1116},[1095,6662,6627],{"class":1567},[1095,6664,6665],{"class":1571},"Should use at least 80",[1095,6667,6633],{"class":3062},[1095,6669,6670],{"class":1571},"ewer queries",[1095,6672,3094],{"class":1567},[1095,6674,1164],{"class":1116},[1039,6676,6678],{"id":6677},"advanced-optimization-patterns","Advanced Optimization Patterns",[1044,6680,6682],{"id":6681},"dynamic-prefetching-based-on-context","Dynamic Prefetching Based on Context",[1086,6684,6686],{"className":1088,"code":6685,"language":1090,"meta":1091,"style":1091},"class ArticleQueryOptimizer:\n    \"\"\"Dynamic query optimization based on context\"\"\"\n    \n    def __init__(self):\n        self.base_queryset = Article.objects.all()\n    \n    def for_list_view(self, include_comments=False):\n        \"\"\"Optimize for article list view\"\"\"\n        queryset = self.base_queryset.select_related(\n            'author', 'category'\n        ).prefetch_related('tags')\n        \n        if include_comments:\n            queryset = queryset.prefetch_related(\n                Prefetch(\n                    'comments',\n                    queryset=Comment.objects.select_related('author')[:5],\n                    to_attr='recent_comments'\n                )\n            )\n        \n        return queryset\n    \n    def for_detail_view(self):\n        \"\"\"Optimize for article detail view\"\"\"\n        return self.base_queryset.select_related(\n            'author', 'author__profile', 'category'\n        ).prefetch_related(\n            'tags',\n            Prefetch(\n                'comments',\n                queryset=Comment.objects.filter(\n                    is_approved=True\n                ).select_related('author').order_by('-created_at'),\n                to_attr='approved_comments'\n            )\n        )\n    \n    def for_api_serialization(self):\n        \"\"\"Optimize for API serialization\"\"\"\n        return self.base_queryset.select_related(\n            'author', 'category'\n        ).prefetch_related(\n            'tags',\n            'comments__author'\n        ).only(\n            'id', 'title', 'slug', 'content', 'created_at',\n            'author__id', 'author__name',\n            'category__id', 'category__name'\n        )\n\n# Usage\noptimizer = ArticleQueryOptimizer()\n\n# In list view\narticles = optimizer.for_list_view(include_comments=True).filter(\n    is_published=True\n)[:20]\n\n# In detail view\narticle = optimizer.for_detail_view().get(slug=slug)\n\n# In API view\narticles = optimizer.for_api_serialization().filter(\n    is_published=True\n)\n",[1030,6687,6688,6697,6706,6710,6723,6747,6751,6773,6782,6800,6816,6832,6836,6845,6860,6867,6878,6909,6922,6927,6931,6935,6941,6945,6958,6967,6983,7007,7015,7025,7032,7042,7061,7070,7099,7112,7116,7120,7124,7137,7146,7162,7178,7186,7196,7204,7213,7258,7278,7296,7300,7304,7308,7319,7323,7328,7357,7365,7373,7377,7382,7412,7416,7421,7440,7448],{"__ignoreMap":1091},[1095,6689,6690,6692,6695],{"class":1097,"line":1098},[1095,6691,1109],{"class":1108},[1095,6693,6694],{"class":1112}," ArticleQueryOptimizer",[1095,6696,1730],{"class":1116},[1095,6698,6699,6701,6704],{"class":1097,"line":1105},[1095,6700,2092],{"class":2091},[1095,6702,6703],{"class":2095},"Dynamic query optimization based on context",[1095,6705,2099],{"class":2091},[1095,6707,6708],{"class":1097,"line":1133},[1095,6709,1712],{"class":1136},[1095,6711,6712,6714,6717,6719,6721],{"class":1097,"line":1167},[1095,6713,4998],{"class":1108},[1095,6715,6716],{"class":1735}," __init__",[1095,6718,1117],{"class":1116},[1095,6720,5297],{"class":5296},[1095,6722,1130],{"class":1116},[1095,6724,6725,6727,6729,6732,6735,6737,6739,6741,6743,6745],{"class":1097,"line":1191},[1095,6726,6608],{"class":4800},[1095,6728,1124],{"class":1116},[1095,6730,6731],{"class":1689},"base_queryset",[1095,6733,6734],{"class":1116}," =",[1095,6736,1331],{"class":1136},[1095,6738,1124],{"class":1116},[1095,6740,1690],{"class":1689},[1095,6742,1124],{"class":1116},[1095,6744,1695],{"class":1148},[1095,6746,1206],{"class":1116},[1095,6748,6749],{"class":1097,"line":1209},[1095,6750,1712],{"class":1136},[1095,6752,6753,6755,6758,6760,6762,6764,6767,6769,6771],{"class":1097,"line":1216},[1095,6754,4998],{"class":1108},[1095,6756,6757],{"class":1671}," for_list_view",[1095,6759,1117],{"class":1116},[1095,6761,5297],{"class":5296},[1095,6763,1405],{"class":1116},[1095,6765,6766],{"class":2069}," include_comments",[1095,6768,1140],{"class":2073},[1095,6770,2488],{"class":1500},[1095,6772,1130],{"class":1116},[1095,6774,6775,6777,6780],{"class":1097,"line":1234},[1095,6776,5675],{"class":2091},[1095,6778,6779],{"class":2095},"Optimize for article list view",[1095,6781,2099],{"class":2091},[1095,6783,6784,6786,6788,6790,6792,6794,6796,6798],{"class":1097,"line":1258},[1095,6785,2225],{"class":1136},[1095,6787,1140],{"class":1116},[1095,6789,6391],{"class":4800},[1095,6791,1124],{"class":1116},[1095,6793,6731],{"class":1689},[1095,6795,1124],{"class":1116},[1095,6797,1032],{"class":1148},[1095,6799,1953],{"class":1116},[1095,6801,6802,6804,6806,6808,6810,6812,6814],{"class":1097,"line":1274},[1095,6803,3786],{"class":1567},[1095,6805,1746],{"class":1571},[1095,6807,1568],{"class":1567},[1095,6809,1405],{"class":1116},[1095,6811,1835],{"class":1567},[1095,6813,1770],{"class":1571},[1095,6815,2354],{"class":1567},[1095,6817,6818,6820,6822,6824,6826,6828,6830],{"class":1097,"line":1279},[1095,6819,3434],{"class":1116},[1095,6821,1036],{"class":1148},[1095,6823,1117],{"class":1116},[1095,6825,1568],{"class":1567},[1095,6827,2590],{"class":1571},[1095,6829,1568],{"class":1567},[1095,6831,1164],{"class":1116},[1095,6833,6834],{"class":1097,"line":1297},[1095,6835,5086],{"class":1136},[1095,6837,6838,6841,6843],{"class":1097,"line":1321},[1095,6839,6840],{"class":1717},"        if",[1095,6842,6766],{"class":1136},[1095,6844,1730],{"class":1116},[1095,6846,6847,6850,6852,6854,6856,6858],{"class":1097,"line":1326},[1095,6848,6849],{"class":1136},"            queryset ",[1095,6851,1140],{"class":1116},[1095,6853,2230],{"class":1136},[1095,6855,1124],{"class":1116},[1095,6857,1036],{"class":1148},[1095,6859,1953],{"class":1116},[1095,6861,6862,6865],{"class":1097,"line":1344},[1095,6863,6864],{"class":1148},"                Prefetch",[1095,6866,1953],{"class":1116},[1095,6868,6869,6872,6874,6876],{"class":1097,"line":1369},[1095,6870,6871],{"class":1567},"                    '",[1095,6873,1572],{"class":1571},[1095,6875,1568],{"class":1567},[1095,6877,1965],{"class":1116},[1095,6879,6880,6883,6885,6887,6889,6891,6893,6895,6897,6899,6901,6903,6905,6907],{"class":1097,"line":1385},[1095,6881,6882],{"class":1154},"                    queryset",[1095,6884,1140],{"class":1116},[1095,6886,2871],{"class":1148},[1095,6888,1124],{"class":1116},[1095,6890,1690],{"class":1689},[1095,6892,1124],{"class":1116},[1095,6894,1032],{"class":1148},[1095,6896,1117],{"class":1116},[1095,6898,1568],{"class":1567},[1095,6900,1746],{"class":1571},[1095,6902,1568],{"class":1567},[1095,6904,4114],{"class":1116},[1095,6906,4293],{"class":1160},[1095,6908,5578],{"class":1116},[1095,6910,6911,6914,6916,6918,6920],{"class":1097,"line":1423},[1095,6912,6913],{"class":1154},"                    to_attr",[1095,6915,1140],{"class":1116},[1095,6917,1568],{"class":1567},[1095,6919,4350],{"class":1571},[1095,6921,2354],{"class":1567},[1095,6923,6924],{"class":1097,"line":1456},[1095,6925,6926],{"class":1116},"                )\n",[1095,6928,6929],{"class":1097,"line":1478},[1095,6930,5604],{"class":1116},[1095,6932,6933],{"class":1097,"line":1506},[1095,6934,5086],{"class":1136},[1095,6936,6937,6939],{"class":1097,"line":1511},[1095,6938,5135],{"class":1717},[1095,6940,2256],{"class":1136},[1095,6942,6943],{"class":1097,"line":1529},[1095,6944,1712],{"class":1136},[1095,6946,6947,6949,6952,6954,6956],{"class":1097,"line":1579},[1095,6948,4998],{"class":1108},[1095,6950,6951],{"class":1671}," for_detail_view",[1095,6953,1117],{"class":1116},[1095,6955,5297],{"class":5296},[1095,6957,1130],{"class":1116},[1095,6959,6960,6962,6965],{"class":1097,"line":1610},[1095,6961,5675],{"class":2091},[1095,6963,6964],{"class":2095},"Optimize for article detail view",[1095,6966,2099],{"class":2091},[1095,6968,6969,6971,6973,6975,6977,6979,6981],{"class":1097,"line":1625},[1095,6970,5135],{"class":1717},[1095,6972,6391],{"class":4800},[1095,6974,1124],{"class":1116},[1095,6976,6731],{"class":1689},[1095,6978,1124],{"class":1116},[1095,6980,1032],{"class":1148},[1095,6982,1953],{"class":1116},[1095,6984,6985,6987,6989,6991,6993,6995,6997,6999,7001,7003,7005],{"class":1097,"line":4187},[1095,6986,3786],{"class":1567},[1095,6988,1746],{"class":1571},[1095,6990,1568],{"class":1567},[1095,6992,1405],{"class":1116},[1095,6994,1835],{"class":1567},[1095,6996,1972],{"class":1571},[1095,6998,1568],{"class":1567},[1095,7000,1405],{"class":1116},[1095,7002,1835],{"class":1567},[1095,7004,1770],{"class":1571},[1095,7006,2354],{"class":1567},[1095,7008,7009,7011,7013],{"class":1097,"line":4209},[1095,7010,3434],{"class":1116},[1095,7012,1036],{"class":1148},[1095,7014,1953],{"class":1116},[1095,7016,7017,7019,7021,7023],{"class":1097,"line":4214},[1095,7018,3786],{"class":1567},[1095,7020,2590],{"class":1571},[1095,7022,1568],{"class":1567},[1095,7024,1965],{"class":1116},[1095,7026,7027,7030],{"class":1097,"line":4220},[1095,7028,7029],{"class":1148},"            Prefetch",[1095,7031,1953],{"class":1116},[1095,7033,7034,7036,7038,7040],{"class":1097,"line":4240},[1095,7035,5765],{"class":1567},[1095,7037,1572],{"class":1571},[1095,7039,1568],{"class":1567},[1095,7041,1965],{"class":1116},[1095,7043,7044,7047,7049,7051,7053,7055,7057,7059],{"class":1097,"line":4257},[1095,7045,7046],{"class":1154},"                queryset",[1095,7048,1140],{"class":1116},[1095,7050,2871],{"class":1148},[1095,7052,1124],{"class":1116},[1095,7054,1690],{"class":1689},[1095,7056,1124],{"class":1116},[1095,7058,2361],{"class":1148},[1095,7060,1953],{"class":1116},[1095,7062,7063,7066,7068],{"class":1097,"line":4266},[1095,7064,7065],{"class":1154},"                    is_approved",[1095,7067,1140],{"class":1116},[1095,7069,2420],{"class":1500},[1095,7071,7072,7075,7077,7079,7081,7083,7085,7087,7089,7091,7093,7095,7097],{"class":1097,"line":4276},[1095,7073,7074],{"class":1116},"                ).",[1095,7076,1032],{"class":1148},[1095,7078,1117],{"class":1116},[1095,7080,1568],{"class":1567},[1095,7082,1746],{"class":1571},[1095,7084,1568],{"class":1567},[1095,7086,1842],{"class":1116},[1095,7088,2427],{"class":1148},[1095,7090,1117],{"class":1116},[1095,7092,1568],{"class":1567},[1095,7094,2434],{"class":1571},[1095,7096,1568],{"class":1567},[1095,7098,2399],{"class":1116},[1095,7100,7101,7104,7106,7108,7110],{"class":1097,"line":4298},[1095,7102,7103],{"class":1154},"                to_attr",[1095,7105,1140],{"class":1116},[1095,7107,1568],{"class":1567},[1095,7109,2914],{"class":1571},[1095,7111,2354],{"class":1567},[1095,7113,7114],{"class":1097,"line":4303},[1095,7115,5604],{"class":1116},[1095,7117,7118],{"class":1097,"line":4311},[1095,7119,3849],{"class":1116},[1095,7121,7122],{"class":1097,"line":4328},[1095,7123,1712],{"class":1136},[1095,7125,7126,7128,7131,7133,7135],{"class":1097,"line":4345},[1095,7127,4998],{"class":1108},[1095,7129,7130],{"class":1671}," for_api_serialization",[1095,7132,1117],{"class":1116},[1095,7134,5297],{"class":5296},[1095,7136,1130],{"class":1116},[1095,7138,7139,7141,7144],{"class":1097,"line":4360},[1095,7140,5675],{"class":2091},[1095,7142,7143],{"class":2095},"Optimize for API serialization",[1095,7145,2099],{"class":2091},[1095,7147,7148,7150,7152,7154,7156,7158,7160],{"class":1097,"line":4366},[1095,7149,5135],{"class":1717},[1095,7151,6391],{"class":4800},[1095,7153,1124],{"class":1116},[1095,7155,6731],{"class":1689},[1095,7157,1124],{"class":1116},[1095,7159,1032],{"class":1148},[1095,7161,1953],{"class":1116},[1095,7163,7164,7166,7168,7170,7172,7174,7176],{"class":1097,"line":4371},[1095,7165,3786],{"class":1567},[1095,7167,1746],{"class":1571},[1095,7169,1568],{"class":1567},[1095,7171,1405],{"class":1116},[1095,7173,1835],{"class":1567},[1095,7175,1770],{"class":1571},[1095,7177,2354],{"class":1567},[1095,7179,7180,7182,7184],{"class":1097,"line":4377},[1095,7181,3434],{"class":1116},[1095,7183,1036],{"class":1148},[1095,7185,1953],{"class":1116},[1095,7187,7188,7190,7192,7194],{"class":1097,"line":5132},[1095,7189,3786],{"class":1567},[1095,7191,2590],{"class":1571},[1095,7193,1568],{"class":1567},[1095,7195,1965],{"class":1116},[1095,7197,7198,7200,7202],{"class":1097,"line":5141},[1095,7199,3786],{"class":1567},[1095,7201,3182],{"class":1571},[1095,7203,2354],{"class":1567},[1095,7205,7206,7208,7211],{"class":1097,"line":5146},[1095,7207,3434],{"class":1116},[1095,7209,7210],{"class":1148},"only",[1095,7212,1953],{"class":1116},[1095,7214,7215,7217,7220,7222,7224,7226,7228,7230,7232,7234,7237,7239,7241,7243,7245,7247,7249,7251,7254,7256],{"class":1097,"line":5154},[1095,7216,3786],{"class":1567},[1095,7218,7219],{"class":1571},"id",[1095,7221,1568],{"class":1567},[1095,7223,1405],{"class":1116},[1095,7225,1835],{"class":1567},[1095,7227,3548],{"class":1571},[1095,7229,1568],{"class":1567},[1095,7231,1405],{"class":1116},[1095,7233,1835],{"class":1567},[1095,7235,7236],{"class":1571},"slug",[1095,7238,1568],{"class":1567},[1095,7240,1405],{"class":1116},[1095,7242,1835],{"class":1567},[1095,7244,3089],{"class":1571},[1095,7246,1568],{"class":1567},[1095,7248,1405],{"class":1116},[1095,7250,1835],{"class":1567},[1095,7252,7253],{"class":1571},"created_at",[1095,7255,1568],{"class":1567},[1095,7257,1965],{"class":1116},[1095,7259,7260,7262,7265,7267,7269,7271,7274,7276],{"class":1097,"line":5159},[1095,7261,3786],{"class":1567},[1095,7263,7264],{"class":1571},"author__id",[1095,7266,1568],{"class":1567},[1095,7268,1405],{"class":1116},[1095,7270,1835],{"class":1567},[1095,7272,7273],{"class":1571},"author__name",[1095,7275,1568],{"class":1567},[1095,7277,1965],{"class":1116},[1095,7279,7280,7282,7285,7287,7289,7291,7294],{"class":1097,"line":5167},[1095,7281,3786],{"class":1567},[1095,7283,7284],{"class":1571},"category__id",[1095,7286,1568],{"class":1567},[1095,7288,1405],{"class":1116},[1095,7290,1835],{"class":1567},[1095,7292,7293],{"class":1571},"category__name",[1095,7295,2354],{"class":1567},[1095,7297,7298],{"class":1097,"line":5177},[1095,7299,3849],{"class":1116},[1095,7301,7302],{"class":1097,"line":5224},[1095,7303,1213],{"emptyLinePlaceholder":1212},[1095,7305,7306],{"class":1097,"line":6098},[1095,7307,2265],{"class":1101},[1095,7309,7310,7313,7315,7317],{"class":1097,"line":6109},[1095,7311,7312],{"class":1136},"optimizer ",[1095,7314,1140],{"class":1116},[1095,7316,6694],{"class":1148},[1095,7318,1206],{"class":1116},[1095,7320,7321],{"class":1097,"line":6128},[1095,7322,1213],{"emptyLinePlaceholder":1212},[1095,7324,7325],{"class":1097,"line":6151},[1095,7326,7327],{"class":1101},"# In list view\n",[1095,7329,7330,7332,7334,7337,7339,7342,7344,7347,7349,7351,7353,7355],{"class":1097,"line":6174},[1095,7331,1938],{"class":1136},[1095,7333,1140],{"class":1116},[1095,7335,7336],{"class":1136}," optimizer",[1095,7338,1124],{"class":1116},[1095,7340,7341],{"class":1148},"for_list_view",[1095,7343,1117],{"class":1116},[1095,7345,7346],{"class":1154},"include_comments",[1095,7348,1140],{"class":1116},[1095,7350,1501],{"class":1500},[1095,7352,1842],{"class":1116},[1095,7354,2361],{"class":1148},[1095,7356,1953],{"class":1116},[1095,7358,7359,7361,7363],{"class":1097,"line":6211},[1095,7360,2495],{"class":1154},[1095,7362,1140],{"class":1116},[1095,7364,2420],{"class":1500},[1095,7366,7367,7369,7371],{"class":1097,"line":6216},[1095,7368,4114],{"class":1116},[1095,7370,4117],{"class":1160},[1095,7372,2694],{"class":1116},[1095,7374,7375],{"class":1097,"line":6221},[1095,7376,1213],{"emptyLinePlaceholder":1212},[1095,7378,7379],{"class":1097,"line":6236},[1095,7380,7381],{"class":1101},"# In detail view\n",[1095,7383,7384,7387,7389,7391,7393,7396,7399,7402,7404,7406,7408,7410],{"class":1097,"line":6250},[1095,7385,7386],{"class":1136},"article ",[1095,7388,1140],{"class":1116},[1095,7390,7336],{"class":1136},[1095,7392,1124],{"class":1116},[1095,7394,7395],{"class":1148},"for_detail_view",[1095,7397,7398],{"class":1116},"().",[1095,7400,7401],{"class":1148},"get",[1095,7403,1117],{"class":1116},[1095,7405,7236],{"class":1154},[1095,7407,1140],{"class":1116},[1095,7409,7236],{"class":1148},[1095,7411,1164],{"class":1116},[1095,7413,7414],{"class":1097,"line":6270},[1095,7415,1213],{"emptyLinePlaceholder":1212},[1095,7417,7418],{"class":1097,"line":6275},[1095,7419,7420],{"class":1101},"# In API view\n",[1095,7422,7423,7425,7427,7429,7431,7434,7436,7438],{"class":1097,"line":6309},[1095,7424,1938],{"class":1136},[1095,7426,1140],{"class":1116},[1095,7428,7336],{"class":1136},[1095,7430,1124],{"class":1116},[1095,7432,7433],{"class":1148},"for_api_serialization",[1095,7435,7398],{"class":1116},[1095,7437,2361],{"class":1148},[1095,7439,1953],{"class":1116},[1095,7441,7442,7444,7446],{"class":1097,"line":6322},[1095,7443,2495],{"class":1154},[1095,7445,1140],{"class":1116},[1095,7447,2420],{"class":1500},[1095,7449,7450],{"class":1097,"line":6327},[1095,7451,1164],{"class":1116},[1044,7453,7455],{"id":7454},"prefetch-with-complex-filtering","Prefetch with Complex Filtering",[1086,7457,7459],{"className":1088,"code":7458,"language":1090,"meta":1091,"style":1091},"def get_articles_with_complex_prefetch():\n    \"\"\"Complex prefetch patterns for advanced use cases\"\"\"\n    \n    from django.db.models import Q, Count, Exists, OuterRef\n    \n    # Prefetch only popular tags (used by multiple articles)\n    popular_tags_subquery = Tag.objects.annotate(\n        usage_count=Count('article')\n    ).filter(usage_count__gte=5)\n    \n    # Prefetch only recent approved comments\n    recent_comments_subquery = Comment.objects.filter(\n        is_approved=True,\n        created_at__gte=timezone.now() - timedelta(days=30)\n    ).select_related('author')\n    \n    # Prefetch related articles by same author (excluding current)\n    related_articles_subquery = Article.objects.filter(\n        is_published=True\n    ).exclude(\n        id=OuterRef('id')\n    ).select_related('category')[:5]\n    \n    articles = Article.objects.select_related(\n        'author', 'category'\n    ).prefetch_related(\n        Prefetch('tags', queryset=popular_tags_subquery, to_attr='popular_tags'),\n        Prefetch('comments', queryset=recent_comments_subquery, to_attr='recent_comments'),\n        Prefetch('author__articles', queryset=related_articles_subquery, to_attr='related_articles')\n    ).filter(is_published=True)\n    \n    return articles\n",[1030,7460,7461,7470,7479,7483,7517,7521,7526,7545,7564,7581,7585,7590,7609,7619,7648,7664,7668,7673,7692,7700,7709,7729,7749,7753,7771,7787,7795,7831,7866,7902,7919,7923],{"__ignoreMap":1091},[1095,7462,7463,7465,7468],{"class":1097,"line":1098},[1095,7464,1668],{"class":1108},[1095,7466,7467],{"class":1671}," get_articles_with_complex_prefetch",[1095,7469,1675],{"class":1116},[1095,7471,7472,7474,7477],{"class":1097,"line":1105},[1095,7473,2092],{"class":2091},[1095,7475,7476],{"class":2095},"Complex prefetch patterns for advanced use cases",[1095,7478,2099],{"class":2091},[1095,7480,7481],{"class":1097,"line":1133},[1095,7482,1712],{"class":1136},[1095,7484,7485,7488,7490,7492,7494,7496,7498,7500,7503,7505,7507,7509,7512,7514],{"class":1097,"line":1167},[1095,7486,7487],{"class":1717},"    from",[1095,7489,2800],{"class":1136},[1095,7491,1124],{"class":1116},[1095,7493,2805],{"class":1136},[1095,7495,1124],{"class":1116},[1095,7497,2810],{"class":1136},[1095,7499,2813],{"class":1717},[1095,7501,7502],{"class":1136}," Q",[1095,7504,1405],{"class":1116},[1095,7506,3341],{"class":1136},[1095,7508,1405],{"class":1116},[1095,7510,7511],{"class":1136}," Exists",[1095,7513,1405],{"class":1116},[1095,7515,7516],{"class":1136}," OuterRef\n",[1095,7518,7519],{"class":1097,"line":1191},[1095,7520,1712],{"class":1136},[1095,7522,7523],{"class":1097,"line":1209},[1095,7524,7525],{"class":1101},"    # Prefetch only popular tags (used by multiple articles)\n",[1095,7527,7528,7531,7533,7535,7537,7539,7541,7543],{"class":1097,"line":1216},[1095,7529,7530],{"class":1136},"    popular_tags_subquery ",[1095,7532,1140],{"class":1116},[1095,7534,1284],{"class":1136},[1095,7536,1124],{"class":1116},[1095,7538,1690],{"class":1689},[1095,7540,1124],{"class":1116},[1095,7542,3406],{"class":1148},[1095,7544,1953],{"class":1116},[1095,7546,7547,7550,7552,7554,7556,7558,7560,7562],{"class":1097,"line":1234},[1095,7548,7549],{"class":1154},"        usage_count",[1095,7551,1140],{"class":1116},[1095,7553,3418],{"class":1148},[1095,7555,1117],{"class":1116},[1095,7557,1568],{"class":1567},[1095,7559,1741],{"class":1571},[1095,7561,1568],{"class":1567},[1095,7563,1164],{"class":1116},[1095,7565,7566,7568,7570,7572,7575,7577,7579],{"class":1097,"line":1258},[1095,7567,3744],{"class":1116},[1095,7569,2361],{"class":1148},[1095,7571,1117],{"class":1116},[1095,7573,7574],{"class":1154},"usage_count__gte",[1095,7576,1140],{"class":1116},[1095,7578,4293],{"class":1160},[1095,7580,1164],{"class":1116},[1095,7582,7583],{"class":1097,"line":1274},[1095,7584,1712],{"class":1136},[1095,7586,7587],{"class":1097,"line":1279},[1095,7588,7589],{"class":1101},"    # Prefetch only recent approved comments\n",[1095,7591,7592,7595,7597,7599,7601,7603,7605,7607],{"class":1097,"line":1297},[1095,7593,7594],{"class":1136},"    recent_comments_subquery ",[1095,7596,1140],{"class":1116},[1095,7598,1516],{"class":1136},[1095,7600,1124],{"class":1116},[1095,7602,1690],{"class":1689},[1095,7604,1124],{"class":1116},[1095,7606,2361],{"class":1148},[1095,7608,1953],{"class":1116},[1095,7610,7611,7613,7615,7617],{"class":1097,"line":1321},[1095,7612,4269],{"class":1154},[1095,7614,1140],{"class":1116},[1095,7616,1501],{"class":1500},[1095,7618,1965],{"class":1116},[1095,7620,7621,7624,7626,7628,7630,7632,7634,7636,7638,7640,7642,7644,7646],{"class":1097,"line":1326},[1095,7622,7623],{"class":1154},"        created_at__gte",[1095,7625,1140],{"class":1116},[1095,7627,2373],{"class":1148},[1095,7629,1124],{"class":1116},[1095,7631,2378],{"class":1148},[1095,7633,2381],{"class":1116},[1095,7635,2384],{"class":2073},[1095,7637,2387],{"class":1148},[1095,7639,1117],{"class":1116},[1095,7641,2392],{"class":1154},[1095,7643,1140],{"class":1116},[1095,7645,1316],{"class":1160},[1095,7647,1164],{"class":1116},[1095,7649,7650,7652,7654,7656,7658,7660,7662],{"class":1097,"line":1344},[1095,7651,3744],{"class":1116},[1095,7653,1032],{"class":1148},[1095,7655,1117],{"class":1116},[1095,7657,1568],{"class":1567},[1095,7659,1746],{"class":1571},[1095,7661,1568],{"class":1567},[1095,7663,1164],{"class":1116},[1095,7665,7666],{"class":1097,"line":1369},[1095,7667,1712],{"class":1136},[1095,7669,7670],{"class":1097,"line":1385},[1095,7671,7672],{"class":1101},"    # Prefetch related articles by same author (excluding current)\n",[1095,7674,7675,7678,7680,7682,7684,7686,7688,7690],{"class":1097,"line":1423},[1095,7676,7677],{"class":1136},"    related_articles_subquery ",[1095,7679,1140],{"class":1116},[1095,7681,1331],{"class":1136},[1095,7683,1124],{"class":1116},[1095,7685,1690],{"class":1689},[1095,7687,1124],{"class":1116},[1095,7689,2361],{"class":1148},[1095,7691,1953],{"class":1116},[1095,7693,7694,7696,7698],{"class":1097,"line":1456},[1095,7695,4093],{"class":1154},[1095,7697,1140],{"class":1116},[1095,7699,2420],{"class":1500},[1095,7701,7702,7704,7707],{"class":1097,"line":1478},[1095,7703,3744],{"class":1116},[1095,7705,7706],{"class":1148},"exclude",[1095,7708,1953],{"class":1116},[1095,7710,7711,7714,7716,7719,7721,7723,7725,7727],{"class":1097,"line":1506},[1095,7712,7713],{"class":1154},"        id",[1095,7715,1140],{"class":1116},[1095,7717,7718],{"class":1148},"OuterRef",[1095,7720,1117],{"class":1116},[1095,7722,1568],{"class":1567},[1095,7724,7219],{"class":1571},[1095,7726,1568],{"class":1567},[1095,7728,1164],{"class":1116},[1095,7730,7731,7733,7735,7737,7739,7741,7743,7745,7747],{"class":1097,"line":1511},[1095,7732,3744],{"class":1116},[1095,7734,1032],{"class":1148},[1095,7736,1117],{"class":1116},[1095,7738,1568],{"class":1567},[1095,7740,1770],{"class":1571},[1095,7742,1568],{"class":1567},[1095,7744,4114],{"class":1116},[1095,7746,4293],{"class":1160},[1095,7748,2694],{"class":1116},[1095,7750,7751],{"class":1097,"line":1529},[1095,7752,1712],{"class":1136},[1095,7754,7755,7757,7759,7761,7763,7765,7767,7769],{"class":1097,"line":1579},[1095,7756,1680],{"class":1136},[1095,7758,1140],{"class":1116},[1095,7760,1331],{"class":1136},[1095,7762,1124],{"class":1116},[1095,7764,1690],{"class":1689},[1095,7766,1124],{"class":1116},[1095,7768,1032],{"class":1148},[1095,7770,1953],{"class":1116},[1095,7772,7773,7775,7777,7779,7781,7783,7785],{"class":1097,"line":1610},[1095,7774,2855],{"class":1567},[1095,7776,1746],{"class":1571},[1095,7778,1568],{"class":1567},[1095,7780,1405],{"class":1116},[1095,7782,1835],{"class":1567},[1095,7784,1770],{"class":1571},[1095,7786,2354],{"class":1567},[1095,7788,7789,7791,7793],{"class":1097,"line":1625},[1095,7790,3744],{"class":1116},[1095,7792,1036],{"class":1148},[1095,7794,1953],{"class":1116},[1095,7796,7797,7799,7801,7803,7805,7807,7809,7811,7813,7816,7818,7821,7823,7825,7827,7829],{"class":1097,"line":4187},[1095,7798,3779],{"class":1148},[1095,7800,1117],{"class":1116},[1095,7802,1568],{"class":1567},[1095,7804,2590],{"class":1571},[1095,7806,1568],{"class":1567},[1095,7808,1405],{"class":1116},[1095,7810,2230],{"class":1154},[1095,7812,1140],{"class":1116},[1095,7814,7815],{"class":1148},"popular_tags_subquery",[1095,7817,1405],{"class":1116},[1095,7819,7820],{"class":1154}," to_attr",[1095,7822,1140],{"class":1116},[1095,7824,1568],{"class":1567},[1095,7826,4333],{"class":1571},[1095,7828,1568],{"class":1567},[1095,7830,2399],{"class":1116},[1095,7832,7833,7835,7837,7839,7841,7843,7845,7847,7849,7852,7854,7856,7858,7860,7862,7864],{"class":1097,"line":4209},[1095,7834,3779],{"class":1148},[1095,7836,1117],{"class":1116},[1095,7838,1568],{"class":1567},[1095,7840,1572],{"class":1571},[1095,7842,1568],{"class":1567},[1095,7844,1405],{"class":1116},[1095,7846,2230],{"class":1154},[1095,7848,1140],{"class":1116},[1095,7850,7851],{"class":1148},"recent_comments_subquery",[1095,7853,1405],{"class":1116},[1095,7855,7820],{"class":1154},[1095,7857,1140],{"class":1116},[1095,7859,1568],{"class":1567},[1095,7861,4350],{"class":1571},[1095,7863,1568],{"class":1567},[1095,7865,2399],{"class":1116},[1095,7867,7868,7870,7872,7874,7876,7878,7880,7882,7884,7887,7889,7891,7893,7895,7898,7900],{"class":1097,"line":4214},[1095,7869,3779],{"class":1148},[1095,7871,1117],{"class":1116},[1095,7873,1568],{"class":1567},[1095,7875,3223],{"class":1571},[1095,7877,1568],{"class":1567},[1095,7879,1405],{"class":1116},[1095,7881,2230],{"class":1154},[1095,7883,1140],{"class":1116},[1095,7885,7886],{"class":1148},"related_articles_subquery",[1095,7888,1405],{"class":1116},[1095,7890,7820],{"class":1154},[1095,7892,1140],{"class":1116},[1095,7894,1568],{"class":1567},[1095,7896,7897],{"class":1571},"related_articles",[1095,7899,1568],{"class":1567},[1095,7901,1164],{"class":1116},[1095,7903,7904,7906,7908,7910,7913,7915,7917],{"class":1097,"line":4220},[1095,7905,3744],{"class":1116},[1095,7907,2361],{"class":1148},[1095,7909,1117],{"class":1116},[1095,7911,7912],{"class":1154},"is_published",[1095,7914,1140],{"class":1116},[1095,7916,1501],{"class":1500},[1095,7918,1164],{"class":1116},[1095,7920,7921],{"class":1097,"line":4240},[1095,7922,1712],{"class":1136},[1095,7924,7925,7927],{"class":1097,"line":4257},[1095,7926,2253],{"class":1717},[1095,7928,3868],{"class":1136},[1044,7930,7932],{"id":7931},"caching-optimized-queries","Caching Optimized Queries",[1086,7934,7936],{"className":1088,"code":7935,"language":1090,"meta":1091,"style":1091},"from django.core.cache import cache\n\ndef get_cached_optimized_articles(cache_timeout=3600):\n    \"\"\"Cache the results of optimized queries\"\"\"\n    \n    cache_key = 'optimized_articles_list'\n    articles = cache.get(cache_key)\n    \n    if articles is None:\n        articles = list(\n            Article.objects.select_related(\n                'author', 'category'\n            ).prefetch_related(\n                'tags',\n                Prefetch(\n                    'comments',\n                    queryset=Comment.objects.filter(is_approved=True)[:5],\n                    to_attr='top_comments'\n                )\n            ).filter(is_published=True)[:50]\n        )\n        \n        cache.set(cache_key, articles, cache_timeout)\n    \n    return articles\n\n# Cache invalidation\nfrom django.db.models.signals import post_save, post_delete\nfrom django.dispatch import receiver\n\n@receiver([post_save, post_delete], sender=Article)\ndef invalidate_article_cache(sender, instance, **kwargs):\n    cache.delete('optimized_articles_list')\n\n@receiver([post_save, post_delete], sender=Comment)\ndef invalidate_comment_cache(sender, instance, **kwargs):\n    cache.delete('optimized_articles_list')\n",[1030,7937,7938,7959,7963,7982,7991,7995,8009,8029,8033,8048,8058,8073,8089,8097,8107,8113,8123,8153,8166,8170,8190,8194,8198,8222,8226,8232,8236,8241,8270,8286,8290,8319,8344,8364,8368,8392,8415],{"__ignoreMap":1091},[1095,7939,7940,7942,7944,7946,7949,7951,7954,7956],{"class":1097,"line":1098},[1095,7941,2797],{"class":1717},[1095,7943,2800],{"class":1136},[1095,7945,1124],{"class":1116},[1095,7947,7948],{"class":1136},"core",[1095,7950,1124],{"class":1116},[1095,7952,7953],{"class":1136},"cache ",[1095,7955,2813],{"class":1717},[1095,7957,7958],{"class":1136}," cache\n",[1095,7960,7961],{"class":1097,"line":1105},[1095,7962,1213],{"emptyLinePlaceholder":1212},[1095,7964,7965,7967,7970,7972,7975,7977,7980],{"class":1097,"line":1133},[1095,7966,1668],{"class":1108},[1095,7968,7969],{"class":1671}," get_cached_optimized_articles",[1095,7971,1117],{"class":1116},[1095,7973,7974],{"class":2069},"cache_timeout",[1095,7976,1140],{"class":2073},[1095,7978,7979],{"class":1160},"3600",[1095,7981,1130],{"class":1116},[1095,7983,7984,7986,7989],{"class":1097,"line":1167},[1095,7985,2092],{"class":2091},[1095,7987,7988],{"class":2095},"Cache the results of optimized queries",[1095,7990,2099],{"class":2091},[1095,7992,7993],{"class":1097,"line":1191},[1095,7994,1712],{"class":1136},[1095,7996,7997,8000,8002,8004,8007],{"class":1097,"line":1209},[1095,7998,7999],{"class":1136},"    cache_key ",[1095,8001,1140],{"class":1116},[1095,8003,1835],{"class":1567},[1095,8005,8006],{"class":1571},"optimized_articles_list",[1095,8008,2354],{"class":1567},[1095,8010,8011,8013,8015,8018,8020,8022,8024,8027],{"class":1097,"line":1216},[1095,8012,1680],{"class":1136},[1095,8014,1140],{"class":1116},[1095,8016,8017],{"class":1136}," cache",[1095,8019,1124],{"class":1116},[1095,8021,7401],{"class":1148},[1095,8023,1117],{"class":1116},[1095,8025,8026],{"class":1148},"cache_key",[1095,8028,1164],{"class":1116},[1095,8030,8031],{"class":1097,"line":1234},[1095,8032,1712],{"class":1136},[1095,8034,8035,8037,8040,8043,8046],{"class":1097,"line":1258},[1095,8036,2141],{"class":1717},[1095,8038,8039],{"class":1136}," articles ",[1095,8041,8042],{"class":2073},"is",[1095,8044,8045],{"class":1500}," None",[1095,8047,1730],{"class":1116},[1095,8049,8050,8052,8054,8056],{"class":1097,"line":1274},[1095,8051,5705],{"class":1136},[1095,8053,1140],{"class":1116},[1095,8055,2581],{"class":2580},[1095,8057,1953],{"class":1116},[1095,8059,8060,8063,8065,8067,8069,8071],{"class":1097,"line":1279},[1095,8061,8062],{"class":1148},"            Article",[1095,8064,1124],{"class":1116},[1095,8066,1690],{"class":1689},[1095,8068,1124],{"class":1116},[1095,8070,1032],{"class":1148},[1095,8072,1953],{"class":1116},[1095,8074,8075,8077,8079,8081,8083,8085,8087],{"class":1097,"line":1297},[1095,8076,5765],{"class":1567},[1095,8078,1746],{"class":1571},[1095,8080,1568],{"class":1567},[1095,8082,1405],{"class":1116},[1095,8084,1835],{"class":1567},[1095,8086,1770],{"class":1571},[1095,8088,2354],{"class":1567},[1095,8090,8091,8093,8095],{"class":1097,"line":1321},[1095,8092,4040],{"class":1116},[1095,8094,1036],{"class":1148},[1095,8096,1953],{"class":1116},[1095,8098,8099,8101,8103,8105],{"class":1097,"line":1326},[1095,8100,5765],{"class":1567},[1095,8102,2590],{"class":1571},[1095,8104,1568],{"class":1567},[1095,8106,1965],{"class":1116},[1095,8108,8109,8111],{"class":1097,"line":1344},[1095,8110,6864],{"class":1148},[1095,8112,1953],{"class":1116},[1095,8114,8115,8117,8119,8121],{"class":1097,"line":1369},[1095,8116,6871],{"class":1567},[1095,8118,1572],{"class":1571},[1095,8120,1568],{"class":1567},[1095,8122,1965],{"class":1116},[1095,8124,8125,8127,8129,8131,8133,8135,8137,8139,8141,8143,8145,8147,8149,8151],{"class":1097,"line":1385},[1095,8126,6882],{"class":1154},[1095,8128,1140],{"class":1116},[1095,8130,2871],{"class":1148},[1095,8132,1124],{"class":1116},[1095,8134,1690],{"class":1689},[1095,8136,1124],{"class":1116},[1095,8138,2361],{"class":1148},[1095,8140,1117],{"class":1116},[1095,8142,2884],{"class":1154},[1095,8144,1140],{"class":1116},[1095,8146,1501],{"class":1500},[1095,8148,4114],{"class":1116},[1095,8150,4293],{"class":1160},[1095,8152,5578],{"class":1116},[1095,8154,8155,8157,8159,8161,8164],{"class":1097,"line":1423},[1095,8156,6913],{"class":1154},[1095,8158,1140],{"class":1116},[1095,8160,1568],{"class":1567},[1095,8162,8163],{"class":1571},"top_comments",[1095,8165,2354],{"class":1567},[1095,8167,8168],{"class":1097,"line":1456},[1095,8169,6926],{"class":1116},[1095,8171,8172,8174,8176,8178,8180,8182,8184,8186,8188],{"class":1097,"line":1478},[1095,8173,4040],{"class":1116},[1095,8175,2361],{"class":1148},[1095,8177,1117],{"class":1116},[1095,8179,7912],{"class":1154},[1095,8181,1140],{"class":1116},[1095,8183,1501],{"class":1500},[1095,8185,4114],{"class":1116},[1095,8187,1253],{"class":1160},[1095,8189,2694],{"class":1116},[1095,8191,8192],{"class":1097,"line":1506},[1095,8193,3849],{"class":1116},[1095,8195,8196],{"class":1097,"line":1511},[1095,8197,5086],{"class":1136},[1095,8199,8200,8203,8205,8207,8209,8211,8213,8215,8217,8220],{"class":1097,"line":1529},[1095,8201,8202],{"class":1136},"        cache",[1095,8204,1124],{"class":1116},[1095,8206,5618],{"class":1148},[1095,8208,1117],{"class":1116},[1095,8210,8026],{"class":1148},[1095,8212,1405],{"class":1116},[1095,8214,1727],{"class":1148},[1095,8216,1405],{"class":1116},[1095,8218,8219],{"class":1148}," cache_timeout",[1095,8221,1164],{"class":1116},[1095,8223,8224],{"class":1097,"line":1579},[1095,8225,1712],{"class":1136},[1095,8227,8228,8230],{"class":1097,"line":1610},[1095,8229,2253],{"class":1717},[1095,8231,3868],{"class":1136},[1095,8233,8234],{"class":1097,"line":1625},[1095,8235,1213],{"emptyLinePlaceholder":1212},[1095,8237,8238],{"class":1097,"line":4187},[1095,8239,8240],{"class":1101},"# Cache invalidation\n",[1095,8242,8243,8245,8247,8249,8251,8253,8255,8257,8260,8262,8265,8267],{"class":1097,"line":4209},[1095,8244,2797],{"class":1717},[1095,8246,2800],{"class":1136},[1095,8248,1124],{"class":1116},[1095,8250,2805],{"class":1136},[1095,8252,1124],{"class":1116},[1095,8254,1121],{"class":1136},[1095,8256,1124],{"class":1116},[1095,8258,8259],{"class":1136},"signals ",[1095,8261,2813],{"class":1717},[1095,8263,8264],{"class":1136}," post_save",[1095,8266,1405],{"class":1116},[1095,8268,8269],{"class":1136}," post_delete\n",[1095,8271,8272,8274,8276,8278,8281,8283],{"class":1097,"line":4214},[1095,8273,2797],{"class":1717},[1095,8275,2800],{"class":1136},[1095,8277,1124],{"class":1116},[1095,8279,8280],{"class":1136},"dispatch ",[1095,8282,2813],{"class":1717},[1095,8284,8285],{"class":1136}," receiver\n",[1095,8287,8288],{"class":1097,"line":4220},[1095,8289,1213],{"emptyLinePlaceholder":1212},[1095,8291,8292,8294,8297,8299,8302,8304,8307,8310,8313,8315,8317],{"class":1097,"line":4240},[1095,8293,4439],{"class":1116},[1095,8295,8296],{"class":1671},"receiver",[1095,8298,2159],{"class":1116},[1095,8300,8301],{"class":1148},"post_save",[1095,8303,1405],{"class":1116},[1095,8305,8306],{"class":1148}," post_delete",[1095,8308,8309],{"class":1116},"],",[1095,8311,8312],{"class":1154}," sender",[1095,8314,1140],{"class":1116},[1095,8316,1545],{"class":1148},[1095,8318,1164],{"class":1116},[1095,8320,8321,8323,8326,8328,8331,8333,8336,8338,8340,8342],{"class":1097,"line":4257},[1095,8322,1668],{"class":1108},[1095,8324,8325],{"class":1671}," invalidate_article_cache",[1095,8327,1117],{"class":1116},[1095,8329,8330],{"class":2069},"sender",[1095,8332,1405],{"class":1116},[1095,8334,8335],{"class":2069}," instance",[1095,8337,1405],{"class":1116},[1095,8339,5013],{"class":2073},[1095,8341,5016],{"class":2069},[1095,8343,1130],{"class":1116},[1095,8345,8346,8349,8351,8354,8356,8358,8360,8362],{"class":1097,"line":4266},[1095,8347,8348],{"class":1136},"    cache",[1095,8350,1124],{"class":1116},[1095,8352,8353],{"class":1148},"delete",[1095,8355,1117],{"class":1116},[1095,8357,1568],{"class":1567},[1095,8359,8006],{"class":1571},[1095,8361,1568],{"class":1567},[1095,8363,1164],{"class":1116},[1095,8365,8366],{"class":1097,"line":4276},[1095,8367,1213],{"emptyLinePlaceholder":1212},[1095,8369,8370,8372,8374,8376,8378,8380,8382,8384,8386,8388,8390],{"class":1097,"line":4298},[1095,8371,4439],{"class":1116},[1095,8373,8296],{"class":1671},[1095,8375,2159],{"class":1116},[1095,8377,8301],{"class":1148},[1095,8379,1405],{"class":1116},[1095,8381,8306],{"class":1148},[1095,8383,8309],{"class":1116},[1095,8385,8312],{"class":1154},[1095,8387,1140],{"class":1116},[1095,8389,2871],{"class":1148},[1095,8391,1164],{"class":1116},[1095,8393,8394,8396,8399,8401,8403,8405,8407,8409,8411,8413],{"class":1097,"line":4303},[1095,8395,1668],{"class":1108},[1095,8397,8398],{"class":1671}," invalidate_comment_cache",[1095,8400,1117],{"class":1116},[1095,8402,8330],{"class":2069},[1095,8404,1405],{"class":1116},[1095,8406,8335],{"class":2069},[1095,8408,1405],{"class":1116},[1095,8410,5013],{"class":2073},[1095,8412,5016],{"class":2069},[1095,8414,1130],{"class":1116},[1095,8416,8417,8419,8421,8423,8425,8427,8429,8431],{"class":1097,"line":4311},[1095,8418,8348],{"class":1136},[1095,8420,1124],{"class":1116},[1095,8422,8353],{"class":1148},[1095,8424,1117],{"class":1116},[1095,8426,1568],{"class":1567},[1095,8428,8006],{"class":1571},[1095,8430,1568],{"class":1567},[1095,8432,1164],{"class":1116},[1039,8434,8436],{"id":8435},"best-practices-and-common-pitfalls","Best Practices and Common Pitfalls",[1044,8438,8440],{"id":8439},"dos-and-donts","Do's and Don'ts",[1086,8442,8444],{"className":1088,"code":8443,"language":1090,"meta":1091,"style":1091},"# ✅ DO: Use select_related for ForeignKey and OneToOne\narticles = Article.objects.select_related('author', 'category')\n\n# ❌ DON'T: Use select_related for ManyToMany or reverse ForeignKey\n# This will raise an error\n# articles = Article.objects.select_related('tags')  # Wrong!\n\n# ✅ DO: Use prefetch_related for ManyToMany and reverse ForeignKey\narticles = Article.objects.prefetch_related('tags', 'comments')\n\n# ✅ DO: Combine both when appropriate\narticles = Article.objects.select_related('author').prefetch_related('tags')\n\n# ❌ DON'T: Chain multiple select_related calls\n# articles = Article.objects.select_related('author').select_related('category')  # Inefficient\n\n# ✅ DO: Use single select_related call with multiple fields\narticles = Article.objects.select_related('author', 'category')\n\n# ✅ DO: Use only() to limit fields when you don't need all data\narticles = Article.objects.select_related('author').only(\n    'title', 'slug', 'author__name'\n)\n\n# ❌ DON'T: Access non-prefetched related objects in loops\narticles = Article.objects.prefetch_related('tags')\nfor article in articles:\n    # This will cause additional queries!\n    comments = article.comments.all()\n\n# ✅ DO: Prefetch all needed relationships\narticles = Article.objects.prefetch_related('tags', 'comments')\nfor article in articles:\n    tags = article.tags.all()      # No additional query\n    comments = article.comments.all()  # No additional query\n",[1030,8445,8446,8451,8485,8489,8494,8499,8504,8508,8513,8547,8551,8556,8594,8598,8603,8608,8612,8617,8651,8655,8660,8690,8714,8718,8722,8727,8753,8765,8770,8789,8793,8798,8832,8844,8865],{"__ignoreMap":1091},[1095,8447,8448],{"class":1097,"line":1098},[1095,8449,8450],{"class":1101},"# ✅ DO: Use select_related for ForeignKey and OneToOne\n",[1095,8452,8453,8455,8457,8459,8461,8463,8465,8467,8469,8471,8473,8475,8477,8479,8481,8483],{"class":1097,"line":1105},[1095,8454,1938],{"class":1136},[1095,8456,1140],{"class":1116},[1095,8458,1331],{"class":1136},[1095,8460,1124],{"class":1116},[1095,8462,1690],{"class":1689},[1095,8464,1124],{"class":1116},[1095,8466,1032],{"class":1148},[1095,8468,1117],{"class":1116},[1095,8470,1568],{"class":1567},[1095,8472,1746],{"class":1571},[1095,8474,1568],{"class":1567},[1095,8476,1405],{"class":1116},[1095,8478,1835],{"class":1567},[1095,8480,1770],{"class":1571},[1095,8482,1568],{"class":1567},[1095,8484,1164],{"class":1116},[1095,8486,8487],{"class":1097,"line":1133},[1095,8488,1213],{"emptyLinePlaceholder":1212},[1095,8490,8491],{"class":1097,"line":1167},[1095,8492,8493],{"class":1101},"# ❌ DON'T: Use select_related for ManyToMany or reverse ForeignKey\n",[1095,8495,8496],{"class":1097,"line":1191},[1095,8497,8498],{"class":1101},"# This will raise an error\n",[1095,8500,8501],{"class":1097,"line":1209},[1095,8502,8503],{"class":1101},"# articles = Article.objects.select_related('tags')  # Wrong!\n",[1095,8505,8506],{"class":1097,"line":1216},[1095,8507,1213],{"emptyLinePlaceholder":1212},[1095,8509,8510],{"class":1097,"line":1234},[1095,8511,8512],{"class":1101},"# ✅ DO: Use prefetch_related for ManyToMany and reverse ForeignKey\n",[1095,8514,8515,8517,8519,8521,8523,8525,8527,8529,8531,8533,8535,8537,8539,8541,8543,8545],{"class":1097,"line":1258},[1095,8516,1938],{"class":1136},[1095,8518,1140],{"class":1116},[1095,8520,1331],{"class":1136},[1095,8522,1124],{"class":1116},[1095,8524,1690],{"class":1689},[1095,8526,1124],{"class":1116},[1095,8528,1036],{"class":1148},[1095,8530,1117],{"class":1116},[1095,8532,1568],{"class":1567},[1095,8534,2590],{"class":1571},[1095,8536,1568],{"class":1567},[1095,8538,1405],{"class":1116},[1095,8540,1835],{"class":1567},[1095,8542,1572],{"class":1571},[1095,8544,1568],{"class":1567},[1095,8546,1164],{"class":1116},[1095,8548,8549],{"class":1097,"line":1274},[1095,8550,1213],{"emptyLinePlaceholder":1212},[1095,8552,8553],{"class":1097,"line":1279},[1095,8554,8555],{"class":1101},"# ✅ DO: Combine both when appropriate\n",[1095,8557,8558,8560,8562,8564,8566,8568,8570,8572,8574,8576,8578,8580,8582,8584,8586,8588,8590,8592],{"class":1097,"line":1297},[1095,8559,1938],{"class":1136},[1095,8561,1140],{"class":1116},[1095,8563,1331],{"class":1136},[1095,8565,1124],{"class":1116},[1095,8567,1690],{"class":1689},[1095,8569,1124],{"class":1116},[1095,8571,1032],{"class":1148},[1095,8573,1117],{"class":1116},[1095,8575,1568],{"class":1567},[1095,8577,1746],{"class":1571},[1095,8579,1568],{"class":1567},[1095,8581,1842],{"class":1116},[1095,8583,1036],{"class":1148},[1095,8585,1117],{"class":1116},[1095,8587,1568],{"class":1567},[1095,8589,2590],{"class":1571},[1095,8591,1568],{"class":1567},[1095,8593,1164],{"class":1116},[1095,8595,8596],{"class":1097,"line":1321},[1095,8597,1213],{"emptyLinePlaceholder":1212},[1095,8599,8600],{"class":1097,"line":1326},[1095,8601,8602],{"class":1101},"# ❌ DON'T: Chain multiple select_related calls\n",[1095,8604,8605],{"class":1097,"line":1344},[1095,8606,8607],{"class":1101},"# articles = Article.objects.select_related('author').select_related('category')  # Inefficient\n",[1095,8609,8610],{"class":1097,"line":1369},[1095,8611,1213],{"emptyLinePlaceholder":1212},[1095,8613,8614],{"class":1097,"line":1385},[1095,8615,8616],{"class":1101},"# ✅ DO: Use single select_related call with multiple fields\n",[1095,8618,8619,8621,8623,8625,8627,8629,8631,8633,8635,8637,8639,8641,8643,8645,8647,8649],{"class":1097,"line":1423},[1095,8620,1938],{"class":1136},[1095,8622,1140],{"class":1116},[1095,8624,1331],{"class":1136},[1095,8626,1124],{"class":1116},[1095,8628,1690],{"class":1689},[1095,8630,1124],{"class":1116},[1095,8632,1032],{"class":1148},[1095,8634,1117],{"class":1116},[1095,8636,1568],{"class":1567},[1095,8638,1746],{"class":1571},[1095,8640,1568],{"class":1567},[1095,8642,1405],{"class":1116},[1095,8644,1835],{"class":1567},[1095,8646,1770],{"class":1571},[1095,8648,1568],{"class":1567},[1095,8650,1164],{"class":1116},[1095,8652,8653],{"class":1097,"line":1456},[1095,8654,1213],{"emptyLinePlaceholder":1212},[1095,8656,8657],{"class":1097,"line":1478},[1095,8658,8659],{"class":1101},"# ✅ DO: Use only() to limit fields when you don't need all data\n",[1095,8661,8662,8664,8666,8668,8670,8672,8674,8676,8678,8680,8682,8684,8686,8688],{"class":1097,"line":1506},[1095,8663,1938],{"class":1136},[1095,8665,1140],{"class":1116},[1095,8667,1331],{"class":1136},[1095,8669,1124],{"class":1116},[1095,8671,1690],{"class":1689},[1095,8673,1124],{"class":1116},[1095,8675,1032],{"class":1148},[1095,8677,1117],{"class":1116},[1095,8679,1568],{"class":1567},[1095,8681,1746],{"class":1571},[1095,8683,1568],{"class":1567},[1095,8685,1842],{"class":1116},[1095,8687,7210],{"class":1148},[1095,8689,1953],{"class":1116},[1095,8691,8692,8694,8696,8698,8700,8702,8704,8706,8708,8710,8712],{"class":1097,"line":1511},[1095,8693,1958],{"class":1567},[1095,8695,3548],{"class":1571},[1095,8697,1568],{"class":1567},[1095,8699,1405],{"class":1116},[1095,8701,1835],{"class":1567},[1095,8703,7236],{"class":1571},[1095,8705,1568],{"class":1567},[1095,8707,1405],{"class":1116},[1095,8709,1835],{"class":1567},[1095,8711,7273],{"class":1571},[1095,8713,2354],{"class":1567},[1095,8715,8716],{"class":1097,"line":1529},[1095,8717,1164],{"class":1116},[1095,8719,8720],{"class":1097,"line":1579},[1095,8721,1213],{"emptyLinePlaceholder":1212},[1095,8723,8724],{"class":1097,"line":1610},[1095,8725,8726],{"class":1101},"# ❌ DON'T: Access non-prefetched related objects in loops\n",[1095,8728,8729,8731,8733,8735,8737,8739,8741,8743,8745,8747,8749,8751],{"class":1097,"line":1625},[1095,8730,1938],{"class":1136},[1095,8732,1140],{"class":1116},[1095,8734,1331],{"class":1136},[1095,8736,1124],{"class":1116},[1095,8738,1690],{"class":1689},[1095,8740,1124],{"class":1116},[1095,8742,1036],{"class":1148},[1095,8744,1117],{"class":1116},[1095,8746,1568],{"class":1567},[1095,8748,2590],{"class":1571},[1095,8750,1568],{"class":1567},[1095,8752,1164],{"class":1116},[1095,8754,8755,8757,8759,8761,8763],{"class":1097,"line":4187},[1095,8756,3016],{"class":1717},[1095,8758,1721],{"class":1136},[1095,8760,1724],{"class":1717},[1095,8762,1727],{"class":1136},[1095,8764,1730],{"class":1116},[1095,8766,8767],{"class":1097,"line":4209},[1095,8768,8769],{"class":1101},"    # This will cause additional queries!\n",[1095,8771,8772,8775,8777,8779,8781,8783,8785,8787],{"class":1097,"line":4214},[1095,8773,8774],{"class":1136},"    comments ",[1095,8776,1140],{"class":1116},[1095,8778,3041],{"class":1136},[1095,8780,1124],{"class":1116},[1095,8782,1572],{"class":1689},[1095,8784,1124],{"class":1116},[1095,8786,1695],{"class":1148},[1095,8788,1206],{"class":1116},[1095,8790,8791],{"class":1097,"line":4220},[1095,8792,1213],{"emptyLinePlaceholder":1212},[1095,8794,8795],{"class":1097,"line":4240},[1095,8796,8797],{"class":1101},"# ✅ DO: Prefetch all needed relationships\n",[1095,8799,8800,8802,8804,8806,8808,8810,8812,8814,8816,8818,8820,8822,8824,8826,8828,8830],{"class":1097,"line":4257},[1095,8801,1938],{"class":1136},[1095,8803,1140],{"class":1116},[1095,8805,1331],{"class":1136},[1095,8807,1124],{"class":1116},[1095,8809,1690],{"class":1689},[1095,8811,1124],{"class":1116},[1095,8813,1036],{"class":1148},[1095,8815,1117],{"class":1116},[1095,8817,1568],{"class":1567},[1095,8819,2590],{"class":1571},[1095,8821,1568],{"class":1567},[1095,8823,1405],{"class":1116},[1095,8825,1835],{"class":1567},[1095,8827,1572],{"class":1571},[1095,8829,1568],{"class":1567},[1095,8831,1164],{"class":1116},[1095,8833,8834,8836,8838,8840,8842],{"class":1097,"line":4266},[1095,8835,3016],{"class":1717},[1095,8837,1721],{"class":1136},[1095,8839,1724],{"class":1717},[1095,8841,1727],{"class":1136},[1095,8843,1730],{"class":1116},[1095,8845,8846,8848,8850,8852,8854,8856,8858,8860,8862],{"class":1097,"line":4276},[1095,8847,1459],{"class":1136},[1095,8849,1140],{"class":1116},[1095,8851,3041],{"class":1136},[1095,8853,1124],{"class":1116},[1095,8855,2590],{"class":1689},[1095,8857,1124],{"class":1116},[1095,8859,1695],{"class":1148},[1095,8861,2381],{"class":1116},[1095,8863,8864],{"class":1101},"      # No additional query\n",[1095,8866,8867,8869,8871,8873,8875,8877,8879,8881,8883],{"class":1097,"line":4298},[1095,8868,8774],{"class":1136},[1095,8870,1140],{"class":1116},[1095,8872,3041],{"class":1136},[1095,8874,1124],{"class":1116},[1095,8876,1572],{"class":1689},[1095,8878,1124],{"class":1116},[1095,8880,1695],{"class":1148},[1095,8882,2381],{"class":1116},[1095,8884,2774],{"class":1101},[1026,8886,8887,8888,1033,8890,8892],{},"This comprehensive guide to ",[1030,8889,1032],{},[1030,8891,1036],{}," provides the foundation for eliminating N+1 queries and building high-performance Django applications with optimized database access patterns.",[8894,8895,8896],"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 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