Method path_exists

lib/sqlalchemy/orm/loading.py:1584–1588

(self, context, path, key)

    @classmethod
    def path_exists(self, context, path, key):
        return (
            path.path in context.post_load_paths
            and key in context.post_load_paths[path.path].loaders
        )

    @classmethod
    def callable_for_path(