djadhere/djadhere/routers.py

class PonyAirRouter:
    def db_for_read(self, model, **hints):
        if model._meta.app_label == 'ponyair':
            return 'ponyair'
        return None

    def db_for_write(self, model, **hints):
        if model._meta.app_label == 'ponyair':
            return 'ponyair'
        return None

    def allow_relation(self, obj1, obj2, **hints):
        return (obj1._meta.app_label == 'ponyair' and obj2._meta.app_label == 'ponyair') \
                or (obj1._meta.app_label != 'ponyair' and obj2._meta.app_label != 'ponyair')

    def allow_migrate(self, db, app_label, model_name=None, **hints):
        if db == 'ponyair' and app_label == 'ponyair':
            return True
        return False