Fixed #3390: the serializer can now contain forward references. Thanks, Russ.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@4610 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/postgresql_psycopg2/base.py

@@ -99,6 +99,9 @@ def get_limit_offset_sql(limit, offset=None):
 def get_random_function_sql():
     return "RANDOM()"
 
+def get_deferrable_sql():
+    return " DEFERRABLE INITIALLY DEFERRED"
+
 def get_fulltext_search_sql(field_name):
     raise NotImplementedError