apps.py

from __future__ import unicode_literals

import sys
from django.apps import AppConfig
from django.dispatch import receiver
from django.db.backends.signals import connection_created


@receiver(connection_created, dispatch_uid="my_unique_identifier")
def on_db_connection_ready(sender, **kwargs):
    from .signals import django_ready
    if 'migrate' not in sys.argv:
        django_ready.send(CommonConfig)


class CommonConfig(AppConfig):
    name = 'common'