[ticket:251]

diff --git a/lib/sqlalchemy/orm/sync.py b/lib/sqlalchemy/orm/sync.py
index 8bb7d5aff11155623760b26d9e417ca60e2f33b1..8004776c8b69f8af9e4114ae74df608003f45b37 100644 (file)
--- a/lib/sqlalchemy/orm/sync.py
+++ b/lib/sqlalchemy/orm/sync.py
@@ -55,7 +55,7 @@ class ClauseSynchronizer(object):
                     source = binary.right
                     dest = binary.left
                 else:
-                    raise ArgumentError("Cant determine direction for relationship %s = %s" % (binary.left.fullname, binary.right.fullname))
+                    raise ArgumentError("Cant determine direction for relationship %s = %s" % (binary.left.table.fullname, binary.right.table.fullname))
                 if self.direction == ONETOMANY:
                     self.syncrules.append(SyncRule(self.parent_mapper, source, dest, dest_mapper=self.child_mapper))
                 elif self.direction == MANYTOONE: