diff options
Diffstat (limited to 'lib/sqlalchemy/mapping')
| -rw-r--r-- | lib/sqlalchemy/mapping/objectstore.py | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/sqlalchemy/mapping/objectstore.py b/lib/sqlalchemy/mapping/objectstore.py index 6b3d7f034..d6b476562 100644 --- a/lib/sqlalchemy/mapping/objectstore.py +++ b/lib/sqlalchemy/mapping/objectstore.py @@ -98,6 +98,8 @@ class Session(object): uow = property(lambda s:s.__uow, doc="returns the parent UnitOfWork corresponding to this transaction.") def begin(self): """calls begin() on the underlying Session object, returning a new no-op SessionTrans object.""" + if self.parent.uow is not self.uow: + raise InvalidRequestError("This SessionTrans is no longer valid") return self.parent.begin() def commit(self): """commits the transaction noted by this SessionTrans object.""" |