Fixed #29076 -- Made Model.refresh_from_db() clear cached relationships even if the related id doesn't change.

1 files changed, 12 insertions, 0 deletions

diff --git a/tests/basic/tests.py b/tests/basic/tests.py
index 7a99ab0cf0..1a5e95e9d6 100644
--- a/tests/basic/tests.py
+++ b/tests/basic/tests.py
@@ -722,3 +722,15 @@ class ModelRefreshTests(TestCase):
         FeaturedArticle.objects.create(article_id=article.pk)
         article.refresh_from_db()
         self.assertTrue(hasattr(article, 'featured'))
+
+    def test_refresh_clears_one_to_one_field(self):
+        article = Article.objects.create(
+            headline='Parrot programs in Python',
+            pub_date=datetime(2005, 7, 28),
+        )
+        featured = FeaturedArticle.objects.create(article_id=article.pk)
+        self.assertEqual(featured.article.headline, 'Parrot programs in Python')
+        article.headline = 'Parrot programs in Python 2.0'
+        article.save()
+        featured.refresh_from_db()
+        self.assertEqual(featured.article.headline, 'Parrot programs in Python 2.0')