- added a check for joining from A->B using join(), along two
different m2m tables. this raises an error in 0.3 but is
possible in 0.4 when aliases are used. [ticket:687]
+ - fixed small exception throw bug in Session.merge()
- engine
- fixed another occasional race condition which could occur
when using pool with threadlocal setting
from sqlalchemy.orm import unitofwork, query
from sqlalchemy.orm.mapper import object_mapper as _object_mapper
from sqlalchemy.orm.mapper import class_mapper as _class_mapper
+from sqlalchemy.orm import util as mapperutil
import weakref
import sqlalchemy