I would like to define my event "after_create" for class Engine which I
would invoke with
eng = create_engine('sqlite:///:memory:')
eng.dispatch.after_create(eng)
I tried this to do this by
class MoreEngineEvents(event.Events):
_target_class_doc = "SomeEngine"
_dispatch_target = Engine
def after_create(self, eng):
pass
But it seems to override existing events for Engine. For example
"before_execute".
If I add method _set_dispatch to MoreEngineEvents as
@staticmethod
def _set_dispatch(cls, dispatch_cls):
new_dispatch = dispatch_cls(None)
dispatch_cls._events = cls
if cls.dispatch is None:
cls.dispatch = new_dispatch
else:
cls.dispatch = new_dispatch._join(cls.dispatch)
return cls.dispatch
it does not seem to help.
What can I do?
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