Fixed #9023 -- Corrected a problem where cached attribute values would cause a delete to cascade to a related object even when the relationship had been set to None. Thanks to TheShark for the report and test case, and to juriejan and Jacob for their work on the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@11009 bcc190cf-cafb-0310-a4f2-bffc1f526a37

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/regressiontests/one_to_one_regress/tests.py b/tests/regressiontests/one_to_one_regress/tests.py
new file mode 100644
index 0000000000..a0a0c0584f
--- /dev/null
+++ b/tests/regressiontests/one_to_one_regress/tests.py
@@ -0,0 +1,22 @@
+from django.test import TestCase
+from regressiontests.one_to_one_regress.models import Place, UndergroundBar
+
+class OneToOneDeletionTests(TestCase):
+    def test_reverse_relationship_cache_cascade(self):
+        """
+        Regression test for #9023: accessing the reverse relationship shouldn't
+        result in a cascading delete().
+        """
+        place = Place.objects.create(name="Dempsey's", address="623 Vermont St")
+        bar = UndergroundBar.objects.create(place=place, serves_cocktails=False)
+
+        # The bug in #9023: if you access the one-to-one relation *before*
+        # setting to None and deleting, the cascade happens anyway.
+        place.undergroundbar
+        bar.place.name='foo'
+        bar.place = None
+        bar.save()
+        place.delete()
+
+        self.assertEqual(Place.objects.all().count(), 0)
+        self.assertEqual(UndergroundBar.objects.all().count(), 1)