与andThen匹配

Question

我的（不完整）代码如下所示：

  def doSomething(name: String): { implicit request =>
    check(name).map {
      case Something() => Ok()
      case SomethingElse() => NoContent
    }
    .andThen {
      case r: Result => logger.info(s"Request finished with status ${r.header.status}")
    }
  }

我收到这样的错误：

[error] myfile.scala:39: fruitless type test: a value of type scala.util.Try[play.api.mvc.Result] cannot also be a play.api.mvc.Result
[error]       case r: Result => logger.info(s"Request finished with status ${r.header.status}")

如何匹配Try？

Answer 1

如果您尝试匹配Try，则需要匹配其构造函数，而不是其构造函数所匹配的内容：

.andThen {
    case Success(r) =>
        logger.info(s"Request finished with status ${r.header.status}")

    case Failure(e) => // Handle failure
}