在 play 2.4 logback 配置中，${application.home} 定义在哪里？

此处的链接向您展示了如何配置自定义记录器。

https://www.playframework.com/documentation/2.4.x/SettingsLogger https://www.playframework.com/documentation/2.4.x/SettingsLogger

我只是想知道 ${application.home} 定义在哪里，因为它似乎没有在我的生产环境中定义。

正如 @user316607 所示，Play 应该定义application.home本身在Logger.config方法 https://github.com/playframework/playframework/blob/2.4.x/framework/src/play/src/main/scala/play/api/Logger.scala#L209。如果您看到了价值application.home_IS_UNDEFINED相反，你正在使用编译时依赖注入 https://www.playframework.com/documentation/2.4.x/ScalaCompileTimeDependencyInjection，你需要打电话Logger.configure你自己在你的ApplicationLoader如中所解释的这篇博文 http://loicdescotte.github.io/posts/play24-compile-time-di/:

class MyApplicationLoader extends ApplicationLoader {
  def load(context: Context) = {
    new MyComponents(context).application
  }
}

class MyComponents(context: Context) extends BuiltInComponentsFromContext(context) {
  // You have to call Logger.configure manually or logback won't work
  Logger.configure(context.environment)

  // ... The rest of your app initialization code ...
}