__init__.py 文件源码

def get_contenttypes_and_models(app_config, using, ContentType):
    if not router.allow_migrate_model(using, ContentType):
        return None, None

    ContentType.objects.clear_cache()

    content_types = {
        ct.model: ct
        for ct in ContentType.objects.using(using).filter(app_label=app_config.label)
    }
    app_models = {
        model._meta.model_name: model
        for model in app_config.get_models()
    }
    return content_types, app_models