From 46b82976bf8651500de6e1c4ccf8c20d535a14e9 Mon Sep 17 00:00:00 2001
From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Wed, 7 Mar 2007 18:05:39 +0000
Subject: - fixed use_alter flag on ForeignKeyConstraint [ticket:503]

---
 lib/sqlalchemy/exceptions.py | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'lib/sqlalchemy/exceptions.py')

diff --git a/lib/sqlalchemy/exceptions.py b/lib/sqlalchemy/exceptions.py
index 08908cdb6..55c345bd7 100644
--- a/lib/sqlalchemy/exceptions.py
+++ b/lib/sqlalchemy/exceptions.py
@@ -49,6 +49,10 @@ class ConcurrentModificationError(SQLAlchemyError):
 
     pass
 
+class CircularDependencyError(SQLAlchemyError):
+    """Raised by topological sorts when a circular dependency is detected"""
+    pass
+    
 class FlushError(SQLAlchemyError):
     """Raised when an invalid condition is detected upon a ``flush()``."""
     pass
-- 
cgit v1.2.1