From 7e5e985c0e17a2d300f9aa8633c3610db600f2e2 Mon Sep 17 00:00:00 2001
From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Sun, 15 Oct 2006 00:07:06 +0000
Subject: - ForeignKey(Constraint) supports "use_alter=True", to create/drop a
 foreign key via ALTER.  this allows circular foreign key relationships to be
 set up.

---
 lib/sqlalchemy/sql_util.py | 2 ++
 1 file changed, 2 insertions(+)

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

diff --git a/lib/sqlalchemy/sql_util.py b/lib/sqlalchemy/sql_util.py
index 94caade68..4935b1add 100644
--- a/lib/sqlalchemy/sql_util.py
+++ b/lib/sqlalchemy/sql_util.py
@@ -40,6 +40,8 @@ class TableCollection(object):
         tuples = []
         class TVisitor(schema.SchemaVisitor):
             def visit_foreign_key(_self, fkey):
+                if fkey.use_alter:
+                    return
                 parent_table = fkey.column.table
                 if parent_table in self:
                     child_table = fkey.parent.table
-- 
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