Define django_loaded signal so we can properly connect our own.
Review Request #968 — Created Aug. 16, 2009 and submitted
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Email notification wasn't getting properly connected to the publish signals because the file wasn't loaded. And connecting them in __init__.py breaks because django isn't loaded yet. With the django_loaded signal, we can delay connecting signals until we're sure all we need is there.
All tests pass.
FYI, Python does not necessarily guarantee that a module is imported only once. This can cause signals to be registered multiple times. If you include the dispatch_uid parameter with a unique string in the connect method, that should avoid the problem. See http://code.djangoproject.com/wiki/Signals and http://code.djangoproject.com/ticket/3951.
Thanks! Committed in r2112.