Warm tip: This article is reproduced from stackoverflow.com, please click
playframework scala

Where is the object Action in play.api.mvc?

发布于 2020-04-23 18:10:03

I am a novice of Play Framework. When I learn it on its webpages. I found some code like this:

import play.api.mvc._
def logging[A](action: Action[A]) = Action.async(action.parser) { request =>
  logger.info("Calling action")
  action(request)
}

I checked its document and there is a function async in ActionBuilder.

How does Action.async works? It seems there is no object Action in play.api.mvc

Questioner
Confixuan
Viewed
16
分享
Mario Galic 2020-02-12 18:45

object Action has been removed in Play 2.8 by Remove deprecated play.api.mvc.Action #9288, and has been replaced by BaseController.Action method which refers to injected controllerComponents.actionBuilder rather than the global objects

  /**
   * ...
   * This is meant to be a replacement for the now-deprecated Action object, and can be used in the same way.
   */
  def Action: ActionBuilder[Request, AnyContent] = controllerComponents.actionBuilder

Notice how, perhaps unconventionally, the method name begins with an uppercase letter. My assumption is this was done to maintain familiar usage

def foo(query: String) = Action {
  Ok
}

Related issues

1
Find last index where an element should be inserted in order to maintain order
2
NoClassDefFoundError during runtime on application built with sbt
3
Error when trying to retrieve json data from h2 database
4
How to change concurrency for test execution in sbt
5
inumtable.List[Object] found required List[Contact]
6
How to define and pass implicit encoder of a particular subtype to AvroSchema
7
scala project export files
8
Scala: currying vs closure
9
Spark with Scala and Pandas
10
Akka HTTP Routing DSL example is invalid