Play Framework 2.7.x 编译时 DI 错误

Question

从https://github.com/playframework/play-socket.io/tree/master/samples/scala/chat创建项目并得到编译错误

overriding method applicationLifecycle in trait MyApplication of type => play.api.inject.DefaultApplicationLifecycle;
 lazy value applicationLifecycle in class BuiltInComponentsFromContext of type play.api.inject.ApplicationLifecycle has incompatible type

试用 Play 2.6.23 和 2.7.2

Answer 1

从MyApplication 中删除以下line 应该可以正常工作：

override def applicationLifecycle: DefaultApplicationLifecycle

用

测试一下

1. git clone https://github.com/playframework/play-socket.io.git
2. cd play-socket
3. 从play-socket.io/samples/scala/chat/app/modules/MyApplicationLoader.scala 中删除覆盖
4. sbt "scalaChat/run" 来自根项目目录 play-socket/
5. 点击http://localhost:9000/