Fixed #33008 -- Fixed prefetch_related() for deleted GenericForeignKeys.

Thanks Simon Charette for the implementation idea.

1 files changed, 18 insertions, 0 deletions

diff --git a/tests/prefetch_related/tests.py b/tests/prefetch_related/tests.py
index cba1897fc5..242ff6c366 100644
--- a/tests/prefetch_related/tests.py
+++ b/tests/prefetch_related/tests.py
@@ -1033,6 +1033,24 @@ class GenericRelationTests(TestCase):
         # instance returned by the manager.
         self.assertEqual(list(bookmark.tags.all()), list(bookmark.tags.all().all()))
 
+    def test_deleted_GFK(self):
+        TaggedItem.objects.create(tag='awesome', content_object=self.book1)
+        TaggedItem.objects.create(tag='awesome', content_object=self.book2)
+        ct = ContentType.objects.get_for_model(Book)
+
+        book1_pk = self.book1.pk
+        self.book1.delete()
+
+        with self.assertNumQueries(2):
+            qs = TaggedItem.objects.filter(tag='awesome').prefetch_related('content_object')
+            result = [
+                (tag.object_id, tag.content_type_id, tag.content_object) for tag in qs
+            ]
+            self.assertEqual(result, [
+                (book1_pk, ct.pk, None),
+                (self.book2.pk, ct.pk, self.book2),
+            ])
+
 
 class MultiTableInheritanceTest(TestCase):