How to access session attribute in Play frame work using scala?

Question

I tried to access session attribute using scala and play frame work. but could n`t get success. here is the code

User.scala

 def login = Action { implicit request =>
        val newLoginForm = loginForm.bindFromRequest()

            newLoginForm.fold(

            hasErrors = { form =>
               Redirect(routes.Users.loginUser()).
                flashing(Flash(form.data) + 
                    ("error" -> "Fill user name and Password"))
                },
            success = { implicit newUser =>
                if(User.findUserBydb(newUser.uname,newUser.pass)){

                    Ok(views.html.pages.page_one()).withSession("mysession"-> "[email protected]")

                }else{
                   Redirect(routes.Users.loginUser()).
                    flashing("error" ->"Invalid Login")
                }    
            }
            )
    }

view ---- > page_one.scala.html

    @import play.api.Play.current
@import play.api.i18n.Messages.Implicits._
@import play.api.mvc.Session
@import play.api.mvc.Request


@index("Hi"){
    <h2>
      Welcome  @request.session.get("mysession")
    </h2>

}

Carlos Vilchez · Accepted Answer · 2016-01-13 11:26:51Z

4

If you need the session on the view, you will need to add the implicit request (implicit request: play.api.mvc.RequestHeader). So your code will be something like

    @import play.api.Play.current
    @import play.api.i18n.Messages.Implicits._
    @import play.api.mvc.Session
    @import play.api.mvc.Request
    @()(implicit request: play.api.mvc.RequestHeader)

    @index("Hi"){
       <h2>
         Welcome  @request.session.get("mysession")
       </h2>

    }

answered Jan 13, 2016 at 11:26

Carlos Vilchez

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6 Comments

marcospereira Over a year ago

I think you can add the implicit directly to the Session object instead: @()(implicit session: Session).

Carlos Vilchez Over a year ago

I don't think it can work using the session as implicit with the current code. It would need to be declared. However, we already have the request object in the first line: def login = Action { implicit request =>

marcospereira Over a year ago

I was talking about the view code and not the controller. As documented here, you can implicitly add Flash scope as a parameter. I suppose you can do the same with Session scope.

Carlos Vilchez Over a year ago

Well, the Flash parameter is kind of a special object. You need to use Result.flashing to make it implicitly available. Perhaps I didn't explain my solution well enough. The view uses what you declare in the Action as a parameter (e.g.: @(testObject: MyObject)) or what you already have declared implicitly as the second parameter at the head declaration (e.g: @()(implicit testObject: MyObject)). If @marcospereira still have doubts about this, perhaps I can extend this with another comment.

marcospereira Over a year ago

Carlos, here is what I'm talking about: gist.github.com/anonymous/f30fba1c385303f0b34d. In other words, just like you can implicitly pass a Flash object to the view, you can do the same with a Session. Notice that flashing is just a idiomatic way to set values in Flash scope, just like withSession.

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