- fixed bugs in determining proper sync clauses from custom inherit

conditions (same in 0.4 r3427) [ticket:769]

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/sqlalchemy/orm/sync.py b/lib/sqlalchemy/orm/sync.py
index 8c70f8cf8..73bfd9763 100644
--- a/lib/sqlalchemy/orm/sync.py
+++ b/lib/sqlalchemy/orm/sync.py
@@ -6,7 +6,7 @@
 
 
 
-from sqlalchemy import sql, schema, exceptions
+from sqlalchemy import sql, schema, exceptions, util
 from sqlalchemy import logging
 from sqlalchemy.orm import util as mapperutil
 
@@ -54,10 +54,10 @@ class ClauseSynchronizer(object):
                 if binary.left.table == binary.right.table:
                     raise exceptions.ArgumentError("need foreign_keys argument for self-referential sync")
 
-                if binary.left in [f.column for f in binary.right.foreign_keys]:
+                if binary.left in util.Set([f.column for f in binary.right.foreign_keys]):
                     dest_column = binary.right
                     source_column = binary.left
-                elif binary.right in [f.column for f in binary.left.foreign_keys]:
+                elif binary.right in util.Set([f.column for f in binary.left.foreign_keys]):
                     dest_column = binary.left
                     source_column = binary.right
             else: