I found this great writeup of Django’s signals on Twitter today. Signals are an incredibly useful tool in Django, and one that is way under-utilized. I used them a lot back when I wrote the second version of lost-theories.com, and I use them a little bit in the Savoy content publishing framework I’ve written at Blue Flavor. I especially make great use of the pre and post save, and pre and post delete signals. Check ‘em out.
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