From ac5e13ef2d6129e17bbd5c1e238dee91aa10cf47 Mon Sep 17 00:00:00 2001
From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Tue, 10 Jan 2006 02:26:57 +0000
Subject: [PATCH] identity map->weakvaluedictionary

---
 lib/sqlalchemy/mapping/objectstore.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/sqlalchemy/mapping/objectstore.py b/lib/sqlalchemy/mapping/objectstore.py
index 7b5ebe82e4..5ca78b6f4b 100644
--- a/lib/sqlalchemy/mapping/objectstore.py
+++ b/lib/sqlalchemy/mapping/objectstore.py
@@ -146,7 +146,7 @@ class UnitOfWork(object):
         if parent is not None:
             self.identity_map = parent.identity_map
         else:
-            self.identity_map = {}
+            self.identity_map = weakref.WeakValueDictionary()
             
         self.attributes = global_attributes
         self.new = util.HashSet(ordered = True)
-- 
2.47.2