utils.py 文件源码

def databases(self):
        if self._databases is None:
            self._databases = settings.DATABASES
        if self._databases == {}:
            self._databases = {
                DEFAULT_DB_ALIAS: {
                    'ENGINE': 'django.db.backends.dummy',
                },
            }
        if self._databases[DEFAULT_DB_ALIAS] == {}:
            self._databases[DEFAULT_DB_ALIAS]['ENGINE'] = 'django.db.backends.dummy'

        if DEFAULT_DB_ALIAS not in self._databases:
            raise ImproperlyConfigured("You must define a '%s' database" % DEFAULT_DB_ALIAS)
        return self._databases