How To Run Arbitrary Code After Django is "Fully Loaded"
I need to perform some fairly simple tasks after my Django environment has been "fully loaded".
More specifically I need to do things like Signal.disconnect() some Django Signals that are setup by my third party library by default and connect my own Signals and I need to do some "monkey patching" to add convenience functions to some Django models from another library.
I've been doing this stuff in my Django app's __init__.py file, which seems to work fine for the monkey patching, but doesn't work for my Signal disconnecting. The problem appears to be one of timing--for whatever reason the Third Party Library always seems to call its Signal.connect() after I try to Signal.disconnect() it.
So two questions:
Do I have any guarantee based on the order of my INSTALLED_APPS the order of when my app's __init__.py module is loaded?
Is there a proper place to put logic that needs to run after Django apps have been fully loaded into memory?
Answer
In Django 1.7 Apps can implement the ready() method: https://docs.djangoproject.com/en/dev/ref/applications/#django.apps.AppConfig.ready