Scala Play 2，将请求传递给方法 [英] Scala Play 2, passing request to method

问题描述

我有一个Play 2.0应用

TestController.scala

def foo(p1: String) = Action {implicit request =>
  Ok(bar(p1))
}

private def bar(p1: String) = {
//access request parameter here
}

是否可以使用implicit将request传递给bar

Is there a way to use implicit to pass request to bar

推荐答案

是的，您可以:

  def foo(p1: String) = Action { implicit request =>
    Ok(bar(p1))
  }

  private def bar(p1: String)(implicit req: RequestHeader) = "content"

代码:

Action { implicit request

在Action对象上调用此方法:

Calls this method on the Action object:

def apply(block: Request[AnyContent] => Result): Action[AnyContent] = {

因此，您所说的请求"与名为"block"的参数匹配.这里的隐式"是可选的:它将请求"值作为隐式参数提供给其他方法/函数调用.

So, what you called "request" matches the paramater named "block". The "implicit" here is optional: it makes the "request" value available as an implicit parameter to other method/function calls.

"bar"函数中的隐式表示可以从隐式值中获取"req"的值，而不必显式传递.

The implicit in your "bar" function says that it can take the value of "req" from an implicit value, and doesn't necessarily need to be passed in explicitly.

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