fix to the column properties to better compile the underlying mapper before access

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/sqlalchemy/orm/mapper.py b/lib/sqlalchemy/orm/mapper.py
index 7261bde2d..b6c5dc56d 100644
--- a/lib/sqlalchemy/orm/mapper.py
+++ b/lib/sqlalchemy/orm/mapper.py
@@ -122,9 +122,10 @@ class Mapper(object):
         class LOrderedProp(util.OrderedProperties):
             """this extends OrderedProperties to trigger a compile() before the
             members of the object are accessed."""
-            def __getattr__(s, key):
+            def _get_data(s):
                 self.compile()
-                return util.OrderedProperties.__getattr__(s, key)
+                return s.__dict__['_OrderedProperties__data']
+            _OrderedProperties__data = property(_get_data)
                 
         self.columns = LOrderedProp()
         self.c = self.columns