From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Sun, 9 Dec 2007 15:04:14 +0000 (+0000)
Subject: only report true for source change if added + deleted, dont pick up inserts
X-Git-Tag: rel_0_4_2~81
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=362164c2820b81cb67927b4c38bfea9c008ce5ec;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

only report true for source change if added + deleted, dont pick up inserts
---

diff --git a/lib/sqlalchemy/orm/sync.py b/lib/sqlalchemy/orm/sync.py
index ed263fc397..c7842d63e4 100644
--- a/lib/sqlalchemy/orm/sync.py
+++ b/lib/sqlalchemy/orm/sync.py
@@ -132,7 +132,7 @@ class SyncRule(object):
     def source_changes(self, uowcommit, source):
         prop = self.source_mapper._columntoproperty[self.source_column]
         (added, unchanged, deleted) = uowcommit.get_attribute_history(source, prop.key, passive=True)
-        return bool(added)
+        return bool(added and deleted)
     
     def update(self, dest, parent, child, old_prefix):
         if self.issecondary is False: