Question

我有一个主布局页面：

//layouts/main.scala.html
@(title: String)(content: => Html)(implicit flash: Flash)
<!DOCTYPE html>
<html>
    <!-- .... -->
    <body>
        <h2>Here is the flash:</h2>
        @views.html.layouts._flash(flash)
        <section class="content">My super content: @content</section>
    </body>
</html>

//layouts/_flash.scala.html
@(flash: Flash)
@flash.data.foreach { case (k, v) =>
    key, value: (@k, @v)
}

还有一个控制器：

//controllers/Application.scala
  def index = Action { implicit request =>
    Ok(views.html.application.index())
  }

并为它提供观点：

//application/index.scala.html
@layouts.main("Index") {
    <h1>Index page</h1>
}

index.scala.html的视图会抛出错误：

could not find implicit value for parameter flash: play.api.mvc.Flash

我试过了：

//application/index.scala.html
@(implicit flash: Flash)
@layouts.main("Index") {
    <h1>Index page</h1>
}

它引起了另一个错误：

not enough arguments for method apply: (implicit flash: play.api.mvc.Flash)play.api.templates.HtmlFormat.Appendable in object index. Unspecified value parameter flash.

Answer 1

尝试将您的观点更改为：

@()(implicit flash: Flash)
@layouts.main("Index") {
    <h1>Index page</h1>
}

或将您的控制器更改为：

def index = Action { implicit request =>
    Ok(views.html.application.index(request.flash))
}

无法在视图中使用Flash

1 个答案: