--- a/iro/model/session.py	Sun Mar 25 20:11:34 2012 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,4 +0,0 @@
-from sqlalchemy.orm.session import Session
-
-class IroSession(Session):
-    pass

--- a/iro/model/utils.py	Sun Mar 25 20:11:34 2012 +0200
+++ b/iro/model/utils.py	Thu Mar 29 17:25:14 2012 +0200
@@ -1,7 +1,5 @@
 from sqlalchemy.orm import sessionmaker
 
-from .session import IroSession
-
 class WithSession(object):
     '''a with statement for a database session connection'''
     def __init__(self, engine, autocommit=False):
@@ -9,7 +7,7 @@
         self.autocommit=autocommit
     
     def __enter__(self):
-        self.session = sessionmaker(bind=self.engine, class_ = IroSession)()
+        self.session = sessionmaker(bind=self.engine)()
         return self.session
     
     def __exit__(self,exc_type, exc_value, traceback):