如何在Spray / akka中手动引发HTTP 404 Not Found异常？

Question

In my repository function, I'm reading a User, then updating that user:

def update(u: User): Future[Int] = {
    this.read(u.id).flatMap {
      case Some(existingUser) =>
        db.run(
          userTable
            .filter(_.id === user.id)
            .update(user.copy(createdDate = existingUser.createdDate)))
      //case None => throw new NotFoundException(); // does this exception exist in spray/akka?
    }
}

I'd like to throw some sort of exception here when the user is not found, so that spray/akka will know that exception means to return HTTP 404 Not Found.

Does spray/akka contain some sort of NotFoundException that I can manually throw?

Answer 1

是否一定是例外，或者您可以使用以下方法：

      case None => HttpResponse(StatusCodes.NotFound)

Answer 2

您可以引发任何异常，然后配置异常处理程序以将异常转换为404响应。