From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Fri, 17 Feb 2006 18:29:26 +0000 (+0000)
Subject: added an assertion to insure that a column is only attached to one table
X-Git-Tag: rel_0_1_1~34
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d18d39b1456dff740806a9f2ae6451c3eb52138c;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

added an assertion to insure that a column is only attached to one table
---

diff --git a/lib/sqlalchemy/schema.py b/lib/sqlalchemy/schema.py
index 8e85fb310b..bb926053d6 100644
--- a/lib/sqlalchemy/schema.py
+++ b/lib/sqlalchemy/schema.py
@@ -271,6 +271,8 @@ class Column(SchemaItem):
         self.table.primary_key.append(self)
             
     def _set_parent(self, table):
+        if getattr(self, 'table', None) is not None:
+            raise "this Column already has a table!"
         if not self.hidden:
             table.columns[self.key] = self
             if self.primary_key: