播放2.6消息迁移

Question

我目前正在尝试将项目从Play 2.5迁移到Play 2.6，并已阅读此docs以迁移消息API。我仍然收到错误：

An implicit Messages instance was not found.

尝试创建这样的自定义错误处理程序时：

class ErrorHandler @Inject()(
  env: Environment,
  conf: Configuration,
  sourceMapper: OptionalSourceMapper,
  router: Provider[Router],
  override val messagesApi: MessagesApi
) extends DefaultHttpErrorHandler(env, conf, sourceMapper, router) with I18nSupport {

  // ...

}

Answer 1

特征I18nSupport将能够提供Messages个实例。但为此，它的范围需要implicit request：

implicit def request2Messages(implicit request: RequestHeader): Messages

确保您的请求标记为implicit