[1.2.X] Fixed #13815 -- Ensure that reverse exclude lookups on nullable foreign keys exclude null values. Thanks to bpeschier for the report and patch.

Backport of r15458 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@15460 bcc190cf-cafb-0310-a4f2-bffc1f526a37

1 files changed, 12 insertions, 0 deletions

diff --git a/tests/regressiontests/null_queries/tests.py b/tests/regressiontests/null_queries/tests.py
index 72dcd5153c..8392c588e4 100644
--- a/tests/regressiontests/null_queries/tests.py
+++ b/tests/regressiontests/null_queries/tests.py
@@ -67,3 +67,15 @@ class NullQueriesTests(TestCase):
             ['<Inner: Inner object>']
         )
 
+        # Ticket #13815: check if <reverse>_isnull=False does not produce
+        # faulty empty lists
+        objB = OuterB.objects.create(data="reverse")
+        self.assertQuerysetEqual(
+            OuterB.objects.filter(inner__isnull=False),
+            []
+        )
+        Inner.objects.create(first=obj)
+        self.assertQuerysetEqual(
+            OuterB.objects.exclude(inner__isnull=False),
+            ['<OuterB: OuterB object>']
+        )