backup_handler.py 文件源码

def load(cls, backup_id, kind_name, shard_id=None):
    """Retrieve SchemaAggregationResult from the Datastore.

    Args:
      backup_id: Required BackupInformation Key.
      kind_name: Required kind name as string.
      shard_id: Optional shard id as string.

    Returns:
      SchemaAggregationResult iterator or an entity if shard_id not None.
    """
    parent = cls._get_parent_key(backup_id, kind_name)
    if shard_id:
      key = datastore_types.Key.from_path(cls.kind(), shard_id, parent=parent)
      return SchemaAggregationResult.get(key)
    else:
      return db.Query(cls).ancestor(parent).run()