我的控制器操作使用类似于以下内容的自定义操作:
class ActionWithContext @Inject()(....)
extends ActionBuilder[ContextAwareRequest] {
def invokeBlock[A](request: Request[A], block: (ContextAwareRequest[A]) => Future[Result]) = {
...
}
}
class ContextAwareRequest[A](val context: MyContext, request: Request[A]) extends WrappedRequest[A](request)
我的控制器如下:
import play.api.i18n.{MessagesApi, I18nSupport, Messages}
import play.api.i18n.Messages.Implicits._
class WebsiteController @Inject() (val messagesApi: MessagesApi, actionWithContext: ActionWithContext, ..)
extends BaseController with I18nSupport {
def edit(websiteId: Int) = actionWithContext { request =>
val model = ..
Ok(views.html.backend.websites.edit(model)(request.context))
}
}
视图页面如下所示:
@(form: Form[controllers.WebsiteForm])(implicit context: MyContext, m: Messages) {
}
我收到错误:
not enough arguments for method apply: (implicit context: com.example.services.components.MyContext, implicit m: play.api.i18n.Messages)play.twirl.api.HtmlFormat.Appendable in class edit.
[error] Unspecified value parameter m.
[error] Ok(views.html.websites.edit(model)(request.context))
[error]
我尝试传递messageApi,如:
Ok(views.html.websites.edit(model)(request.context, messageApi))
但是我在Messages和MessageApi之间遇到了类型不匹配错误。
我该怎么办?
P.S我甚至没有在我的观点中使用消息,但我正在使用表单助手,我猜这些消息在封面下使用...
答案 0 :(得分:9)
看起来你正试图明确传递一个隐式参数而另一个隐式传递。你必须明确地传递它们:
Ok(views.html.websites.edit(model)(request.context, implicitly[Messages]))
或两者都含蓄地说:
implicit val context = request.context
Ok(views.html.websites.edit(model))