Fixed #29896 -- Fixed incorrect Model.save() cache relation clearing for foreign keys that use to_field.

Regression in ee49306176a2d2f1751cb890bd607d42c7c09196.

1 files changed, 6 insertions, 0 deletions

diff --git a/tests/many_to_one/tests.py b/tests/many_to_one/tests.py
index a2ff587ab3..b04e6ad77a 100644
--- a/tests/many_to_one/tests.py
+++ b/tests/many_to_one/tests.py
@@ -666,3 +666,9 @@ class ManyToOneTests(TestCase):
         self.a.reporter_id = self.r2.pk
         self.a.save()
         self.assertEqual(self.a.reporter, self.r2)
+
+    def test_cached_foreign_key_with_to_field_not_cleared_by_save(self):
+        parent = Parent.objects.create(name='a')
+        child = ToFieldChild.objects.create(parent=parent)
+        with self.assertNumQueries(0):
+            self.assertIs(child.parent, parent)