TransactionBase.changed_entities fails without TransactionChanges plugin

[kandarz]

I'm upgrading from v1.0b5 to 1.1.4 and I encountered that TransactionBase.changed_entities breaks when not using TransactionChanges plugin which I'm not as it wasn't required before.

Commenting out lines 50-51 in 1.1.4 allows continued use as before.

if class_.__name__ not in self.entity_names:
    continue

As it's the self.changes property that doesn't exist:

@property
def entity_names(self):
    """
    Return a list of entity names that changed during this transaction.
    """
    return [changes.entity_name for changes in self.changes]

As far as I can tell, the TransactionChanges portion is just to not query the DB if its already known no entities were changed.

Is this something that can be changed?

[TomGoBravo]

#268 addresses this issue.