Django Signal

Because I really wanted something similar to Django's Signal in Ruby.

The Observable module was almost, but not entirely, not over engineered.

• It made me have an object as the observer, not just a generic callable.
• It's not a self standing class. It has to be included by someone.
• Solution is not obvious if an object has various observable concerns.
• add_observer had everything to cause me reload problems.

But, will this work as I expect?

First of all, I obviously didn't wire this signals to ActiveRecord.

Also, I took the liberty to make some adaptations. Namely:

• No explicit weakref stuff. Want a weakref? Build if yourself. Invalid refs are handled gracefuly. Check the tests.
• No providing_args, since they had no functional relevance.

Installation

Just add it to your projects' Gemfile:

gem "django_signal"

Usage

https://docs.djangoproject.com/en/dev/topics/signals/#defining-and-sending-signals

Credits

• https://code.djangoproject.com/svn/django/trunk/django/dispatch/dispatcher.py
• Gonçalo Silva (@goncalossilva) for teaching me how to cut gems.

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Copyright © 2012 Paulo Köch, released under the MIT license