loader.py 文件源码

def migrations_module(cls, app_label):
        """
        Return the path to the migrations module for the specified app_label
        and a boolean indicating if the module is specified in
        settings.MIGRATION_MODULE.
        """
        if app_label in settings.MIGRATION_MODULES:
            return settings.MIGRATION_MODULES[app_label], True
        else:
            app_package_name = apps.get_app_config(app_label).name
            return '%s.%s' % (app_package_name, MIGRATIONS_MODULE_NAME), False