Question

我刚刚更新到Play 2.5.2，我的过滤器（在Login上运行）给出了以下错误：

ProvisionException: Unable to provision, see the following errors:

1) Error injecting constructor, java.lang.RuntimeException: There is no started application
  at filters.LoginFilter.<init>(LoginFilter.scala:15)

我不得不稍微修改我的代码以匹配由2.5.2设置为Filter的新更改：

import akka.stream.Materializer
import com.google.inject.Inject
import play.api.Play._
import play.api.cache.CacheApi
import play.api.mvc.Results._
import play.api.mvc.{Filter, RequestHeader, Result}

import scala.concurrent.{ExecutionContext, Future}

class LoginFilter @Inject() (implicit val mat: Materializer, ec: ExecutionContext) extends Filter {
}

我必须添加带有Materializer的@Inject，否则我会收到一条错误消息，指出该类应该是抽象的，或者应该实现Materializer。

我该如何解决这个问题？谢谢！

Answer 1

I'm actually not sure about this one and honestly I don't know the difference but in all my files there is the javax.inject not the google inject, so it might be worth a try.

Instead of:

import com.google.inject.Inject

try:

import javax.inject.Inject

升级到2.5后：注入构造函数时出错

1 个答案: