DeleteByQueryResponse与DeleteResponse

我有以下代码:

ElasticService.delete(id) match {
case failure: RequestFailure => complete(StatusCodes.InternalServerError, failure.body.getOrElse("Unknown reason"))

case success: RequestSuccess[DeleteResponse] => {
  println(s"$id Deleted")
  .....
}

}

“delete”方法实现为:

def delete(id: String): Response[DeleteResponse] = {
    client.execute {
      deleteById("myIndex", id)
    }.await
  }

这一切都如预期的那样。但如果我通过用DeleteByQueryResponse替换DeleteResponse来修改匹配块,我会看到匹配仍然会发生。

为什么会这样?我没有看到DeleteResponse和DeleteByQueryResponse之间的层次关系。