Fixed #12247 -- Corrected the way update queries are processed when the update only refers to attributes on a base class. Thanks to jsmullyan for the report, and matiasb for the fix.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12910 bcc190cf-cafb-0310-a4f2-bffc1f526a37

1 files changed, 1 insertions, 1 deletions

diff --git a/django/db/models/sql/subqueries.py b/django/db/models/sql/subqueries.py
index 6b52729f68..a066dfeca8 100644
--- a/django/db/models/sql/subqueries.py
+++ b/django/db/models/sql/subqueries.py
@@ -131,7 +131,7 @@ class UpdateQuery(Query):
         for model, values in self.related_updates.iteritems():
             query = UpdateQuery(model)
             query.values = values
-            if self.related_ids:
+            if self.related_ids is not None:
                 query.add_filter(('pk__in', self.related_ids))
             result.append(query)
         return result