How To Run Arbitrary Code After Django is “Fully Loaded”

Question

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(

Answer 1

I had to do the following monkey patching. I use django 1.5 from github branch. I don't know if that's the proper way to do it, but it works for me.

I couldn't use middleware, because i also wanted the manage.py scripts to be affected.

anyway, here's this rather simple patch:

import django
from django.db.models.loading import AppCache

django_apps_loaded = django.dispatch.Signal()

def populate_with_signal(cls):
    ret = cls._populate_orig()
    if cls.app_cache_ready():
        if not hasattr(cls, '__signal_sent'):
            cls.__signal_sent = True
            django_apps_loaded.send(sender=None)
    return ret

if not hasattr(AppCache, '_populate_orig'):
    AppCache._populate_orig = AppCache._populate
    AppCache._populate = populate_with_signal

and then you could use this signal like any other:

def django_apps_loaded_receiver(sender, *args, **kwargs):
    # put your code here.
django_apps_loaded.connect(django_apps_loaded_receiver)