Fixed #21961 -- Added support for database-level delete options for ForeignKey.

Thanks Simon Charette for pair programming.

Co-authored-by: Nick Stefan <NickStefan12@gmail.com>
Co-authored-by: Akash Kumar Sen <71623442+Akash-Kumar-Sen@users.noreply.github.com>
Co-authored-by: Simon Charette <charette.s@gmail.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/contenttypes_tests/test_checks.py b/tests/contenttypes_tests/test_checks.py
index c33920f6b7..5c88b71777 100644
--- a/tests/contenttypes_tests/test_checks.py
+++ b/tests/contenttypes_tests/test_checks.py
@@ -80,6 +80,27 @@ class GenericForeignKeyTests(SimpleTestCase):
             ],
         )
 
+    def test_content_type_db_on_delete(self):
+        class Model(models.Model):
+            content_type = models.ForeignKey(ContentType, models.DB_CASCADE)
+            object_id = models.PositiveIntegerField()
+            content_object = GenericForeignKey("content_type", "object_id")
+
+        field = Model._meta.get_field("content_object")
+
+        self.assertEqual(
+            field.check(),
+            [
+                checks.Error(
+                    "'Model.content_type' cannot use the database-level on_delete "
+                    "variant.",
+                    hint="Change the on_delete rule to the non-database variant.",
+                    obj=field,
+                    id="contenttypes.E006",
+                )
+            ],
+        )
+
     def test_missing_object_id_field(self):
         class TaggedItem(models.Model):
             content_type = models.ForeignKey(ContentType, models.CASCADE)