gestioCOF/kfet/auth/apps.py

from django.apps import AppConfig
from django.db.models.signals import post_migrate
from django.utils.translation import ugettext_lazy as _


class KFetAuthConfig(AppConfig):
    name = 'kfet.auth'
    label = 'kfetauth'
    verbose_name = _("K-Fêt - Authentification et Autorisation")

    def ready(self):
        from . import signals  # noqa
        post_migrate.connect(finish_setup_kfet_generic_user, sender=self)


def finish_setup_kfet_generic_user(sender, apps, **kwargs):
    from kfet.models import Account
    from .utils import setup_kfet_generic_user
    # Even if no kfetauth migration has been applied, the post_migrate signal
    # is issued for KFetAuthConfig.
    # Before finishing setup of the kfet generic user, check dependencies are
    # ready: kfet.Account model and gestion.Profile (old schema may not use
    # this model).
    try:
        apps.get_model('kfet', 'Account')
        apps.get_model('gestion', 'Profile')
        Account.objects.get_generic()
    except (LookupError, Account.DoesNotExist):
        return

    setup_kfet_generic_user()