Fixed #33651 -- Added support for prefetching GenericForeignKey.

Co-authored-by: revanthgss <revanthgss@almabase.com>
Co-authored-by: Mariusz Felisiak <felisiak.mariusz@gmail.com>

tests/many_to_many/tests.py

@@ -2,6 +2,7 @@ from unittest import mock
 
 from django.db import transaction
 from django.test import TestCase, skipIfDBFeature, skipUnlessDBFeature
+from django.utils.deprecation import RemovedInDjango60Warning
 
 from .models import Article, InheritedArticleA, InheritedArticleB, Publication, User
 
@@ -561,3 +562,23 @@ class ManyToManyTests(TestCase):
         self.assertEqual(
             self.p3.article_set.exists(), self.p3.article_set.all().exists()
         )
+
+    def test_get_prefetch_queryset_warning(self):
+        articles = Article.objects.all()
+        msg = (
+            "get_prefetch_queryset() is deprecated. Use get_prefetch_querysets() "
+            "instead."
+        )
+        with self.assertWarnsMessage(RemovedInDjango60Warning, msg):
+            self.a1.publications.get_prefetch_queryset(articles)
+
+    def test_get_prefetch_querysets_invalid_querysets_length(self):
+        articles = Article.objects.all()
+        msg = (
+            "querysets argument of get_prefetch_querysets() should have a length of 1."
+        )
+        with self.assertRaisesMessage(ValueError, msg):
+            self.a1.publications.get_prefetch_querysets(
+                instances=articles,
+                querysets=[Publication.objects.all(), Publication.objects.all()],
+            )