Question

我正在使用Play框架2.2.x和SecureSocial并进行测试我试图覆盖超类中的方法。实际上我使用来自安全社交的测试助手类得到了编译错误，我无法弄明白，因为我对Scala并不熟悉。

我不明白为什么我的ide方法被正确覆盖但是当我编译时我得到了错误。我知道scala与ides没有很好的集成，但我不明白为什么覆盖是不正确的。

/**
 *  This is the secure social class and method I am trying to override. 
    I have left the other methods out for clarity. The problem method is the doAuth method
 **/

包securesocial.core

import providers.utils.RoutesHelper
import play.api.mvc.{SimpleResult, AnyContent, Request}
import play.api.{Play, Application, Plugin}
import concurrent.{Await, Future}
import play.api.libs.ws.Response

abstract class IdentityProvider(application: Application) extends Plugin with Registrable {
 /**
   * Subclasses need to implement the authentication logic. This method needs to return
   * a User object that then gets passed to the fillProfile method
   *
   * @param request
   * @return Either a Result or a User
   * This is the method I am having trouble trying to override
   */
  def doAuth()(implicit request: Request[AnyContent]):Either[SimpleResult, SocialUser]
}

这是我的类和doAuth（）覆盖包测试包

import play.api.Logger
import securesocial.core._
import play.api.mvc.{Result, Request}
import securesocial.core.IdentityId

class AlwaysValidIdentityProvider(app:play.api.Application) extends IdentityProvider(app){
  val logger = Logger("securesocial.stubs.AlwaysValidIdentityProvider")
  def authMethod: AuthenticationMethod = AuthenticationMethod("naive")


  override def doAuth()(implicit request: Request[play.api.mvc.AnyContent]): Either[Result, SocialUser] ={
    val userId = request.body.toString
    val r =Right(SocialUserGenerator.socialUserGen(IdentityId(userId, id), authMethod).sample.get)
    r
  }


  def fillProfile(user: SocialUser): SocialUser = {
    user
  }

  def id: String = "naive"
}

我得到的错误是：你可以看到它认为我什么都没有。

[error] /Users/zola/Development/play/receipt-manager/rm-play/test/testkit/AlwaysValidIdentityProvider.scala:8: class AlwaysValidIdentityProvider needs to be abstract, since method doAuth in class IdentityProvider of type [A]()(implicit request: play.api.mvc.Request[A])Either[play.api.mvc.Result,securesocial.core.SocialUser] is not defined
[error] class AlwaysValidIdentityProvider(app:play.api.Application) extends IdentityProvider(app){
[error]       ^
[error] /Users/zola/Development/play/receipt-manager/rm-play/test/testkit/AlwaysValidIdentityProvider.scala:13: method doAuth overrides nothing.
[error] Note: the super classes of class AlwaysValidIdentityProvider contain the following, non final members named doAuth:
[error] def doAuth[A]()(implicit request: play.api.mvc.Request[A]): Either[play.api.mvc.Result,securesocial.core.SocialUser]
[error]   override def doAuth()(implicit request: Request[play.api.mvc.AnyContent]): Either[Result, SocialUser] ={
[error]                ^
[error] two errors found

Answer 1

那是因为您已覆盖的方法尚未定义。你在抽象类中有一个签名，就是这样。

请改为尝试：

def doAuth()(implicit request: Request[play.api.mvc.AnyContent]): Either[Result, SocialUser] ={
    val userId = request.body.toString
    val r =Right(SocialUserGenerator.socialUserGen(IdentityId(userId, id), authMethod).sample.get)
    r
}

Answer 2

为了解决这个问题，我查看了SecureSocial中的其他类，他们实现该方法的方式是

    def doAuth[A]()(implicit request: Request[A]): Either[Result, SocialUser] = {
     val userId = request.body.toString
     val r =Right(SocialUserGenerator.socialUserGen(IdentityId(userId, id), authMethod).sample.get)
     r
 }

Scala覆盖错误

2 个答案: