Question

I am new to scala and type-safe languages so I could be overlooking something basic. That said here’s my problem.

Goal: I want to submit a form that is just one text input, and does not mirror my case class. It is going to end up as type: String

Issue: Can’t get into success from fold

I have a form on the frontend that I opted to write in html instead of play’s form helpers (willing to change if this is the issue)

<form method="POST" action="@routes.Application.shorten()">
  <input id="urlLong" name="urlLong" type="text" placeholder="http://www.google.com/" class="span4"/>
  <div class="form-actions">
    <button type="reset" class="btn">Reset</button>
    <button type="submit" class="btn btn-primary pull-right"><span class="icon-random"></span> Shrtn It!</button>
  </div>
</form>

The controller that is handling the post action looks like this:

import ...

object Application extends Controller {

  val newUrlForm = Form(
    "urlLong" -> text
  )

  def shorten = Action { implicit request =>
    val urlLong = newUrlForm.bindFromRequest.get

    newUrlForm.fold(
      hasErrors = { form =>
        val message = "Somethings gone terribly wrong"
        Redirect(routes.Application.dash()).flashing("error" -> message)
    },

    success = { form =>
      val message = "Woot it was successfully added!"
      Redirect(routes.Application.dash()).flashing("success" -> message)
    }
  }
  ...
}

I was trying to follow / modify the tutorial in the Play for Scala book, but they match their form to a case class, and Play’s tutorial is a bit off from my use case as well. Along with your answer if you could include how you figured it out, that would be really useful so I can troubleshoot on my own better.

• http://www.playframework.com/documentation/2.0/ScalaForms
• http://www.playframework.com/documentation/api/2.0/scala/index.html#play.api.data.Forms$

Also if it matters I am using intellij idea as my ide

Answer 1

You need to call the fold method on form.bindFromRequest. From the documentation > Handling binding failure

loginForm.bindFromRequest.fold(
  formWithErrors => // binding failure, you retrieve the form containing errors,
  value => // binding success, you get the actual value 
)

Also you can use the single Mapping construct for a single field

Form(
  single(
    "email" -> email
  )
)