与备选方案异步的重载方法值：

Question

当我有以下代码时，一切都可以正常编译。

 def create(name: String, age: Int) = Action.async {
    val json = Json.obj(
      "name" -> name,
      "age" -> age,
      "created" -> new java.util.Date().getTime())

    collection.insert(json).map(lastError =>
      Ok("Mongo LastError: %s".format(lastError)))
  }

但是提取内容到另一个方法时如下

 def create(name: String, age: Int) = Action.async {
   createPerson(name,age)
 }

  def createPerson(name: String, age: Int) = Action.async {
    val json = Json.obj(
      "name" -> name,
      "age" -> age,
      "created" -> new java.util.Date().getTime())

    collection.insert(json).map(lastError =>
      Ok("Mongo LastError: %s".format(lastError)))
  }

它给出了错误

[error] /media/pubudu/NTFSPartition/projects/catnet/data-collector-backend/app/controllers/Application.scala:50: overloaded method value async with alternatives:
[error]   [A](bodyParser: play.api.mvc.BodyParser[A])(block: play.api.mvc.Request[A] => scala.concurrent.Future[play.api.mvc.Result])play.api.mvc.Action[A] <and>
[error]   (block: play.api.mvc.Request[play.api.mvc.AnyContent] => scala.concurrent.Future[play.api.mvc.Result])play.api.mvc.Action[play.api.mvc.AnyContent] <and>
[error]   (block: => scala.concurrent.Future[play.api.mvc.Result])play.api.mvc.Action[play.api.mvc.AnyContent]
[error]  cannot be applied to (play.api.mvc.Action[play.api.mvc.AnyContent])
[error]   def create(name: String, age: Int) = Action.async {

这两个代码段不是在做同样的事情吗？如果没有，我如何提取方法的内容而不会出现错误？我想做的是从两个不同的地方调用提取的方法。

Answer 1

create方法期望return类型是Future[Result]，但是createPersonreturn的调用是Action[AnyContent]。您可以通过进行以下更改来更正它：

def create(name: String, age: Int) = Action.async {
   createPerson(name,age).map(lastError =>
      Ok("Mongo LastError: %s".format(lastError)))
 }

  def createPerson(name: String, age: Int):Future[String] = {
    val json = Json.obj(
      "name" -> name,
      "age" -> age,
      "created" -> new java.util.Date().getTime())

    collection.insert(json)
  }

与备选方案异步的重载方法值：

overloaded method value async with alternatives:

scala

playframework

reactivemongo