I18n在Play Framework 2.4.0中

时间:2015-04-22 16:07:53

标签: scala playframework

这是我的<p:add-attribute match="/c:request" attribute-name="href"> <p:with-option name="attribute-value" select="concat('http://localhost:8000/myRESTendpoint?uri=/mydb/', /*/@name, /*/@number,'.xml')"/> </p:add-attribute> 文件:

routes

请注意,所有这些都以GET /:lang controller.Application.index(lang: String) GET /:lang/news controller.Application.news(lang: String) 开头。

目前,我将/:lang写为

Application.scala

通过这种方式,我必须尽可能多地编写def index(lang: String) = Action { implicit val messages: Messages = play.api.i18n.Messages.Implicits.applicationMessages( Lang(lang), play.api.Play.current) Ok(views.html.index("title")) } 作为implicit Messages。有没有更好的解决方案呢?

2 个答案:

答案 0 :(得分:1)

仅传递Lang是一个更简单的选项:

def lang(lang: String) = Action {
    Ok(views.html.index("play")(Lang(lang)))
}

//template
@(text: String)(implicit lang: play.api.i18n.Lang)
@Messages("hello")

您可以使用操作组合重用某些代码,定义包装的请求和操作:

case class LocalizedRequest(val lang: Lang, request: Request[AnyContent]) extends WrappedRequest(request)

def LocalizedAction(lang: String)(f: LocalizedRequest => Result) = {
    Action{ request =>
      f(LocalizedRequest(Lang(lang), request))
    }
}

现在您可以像这样重用LocalizedAction

//template
@(text: String)(implicit request: controllers.LocalizedRequest)
@Messages("hello")

//controller
def lang(lang: String) = LocalizedAction(lang){implicit request =>
    Ok(views.html.index("play"))
}

答案 1 :(得分:0)

最后,我通过以下方式解决了这个问题。

正如@Infinity建议的那样,我将包装的请求和操作定义为:

case class LocalizedRequest(messages: Messages,
                            request: Request[AnyContent])
  extends WrappedRequest(request)


object Actions {
  def LocalizedAction(lang: String)(f: LocalizedRequest => Result) = {
    Action { request =>
      f(LocalizedRequest(applicationMessages(Lang(lang), current), request))
    }
  }

  object Implicits {
    implicit def localizedRequest2Messages(implicit request: LocalizedRequest): Messages = request.messages
  }
}

现在我可以像这样使用LocalizedAction

def lang(lang: String) = LocalizedAction(lang) { implicit request =>
    Ok(views.html.index("play"))
}

但是,为了省略implicit的{​​{1}}参数,Messages应该是play.api.i18n.Messages,我在模板中添加了一行:

@import controllers.Actions.Implicits._