Ticket #7315: 7315-fix.diff

django/db/models/sql/query.py

@@ -837 +837 @@
             # Not all tables need to be joined to anything. No join type
             # means the later columns are ignored.
             join_type = None
-        elif promote or outer_if_first:
+        elif promote or outer_if_first or nullable:
             join_type = self.LOUTER
         else:
             join_type = self.INNER