Playframework POST parameter - scala

Question

I'm trying to go something really simple with Playframework Scala (2.3): create a route POST and get POST parameters.
The route definition
POST /ff/user controllers.Application.createUser
The controller
def createUser = Action.async { request =>
val user = request.queryString.get("user").flatMap(_.headOption)
val email = request.queryString.get("email").flatMap(_.headOption)
val firstname = request.queryString.get("firstname").flatMap(_.headOption)
val lastname = request.queryString.get("lastname").flatMap(_.headOption)
Logger.debug("Create User")
Logger.debug(s"user=$user")
Logger.debug(s"email=$email")
Ok("Youpi")
}
When I post a request to /ff/user, the log says : user=None, email=None.
I cannot figure out why they are "None". What is wrong?
Thank for helping.

Answer 1

When using a POST like this, you probably want to look at the body field on the request parameter, which will contain the form that was posted. You usually don't use a query string with POST requests (more about that here). So, that might look like:
def createUser = Action.async { request =>
val user = request.body.asFormUrlEncoded.get.get("user").head
Future(Ok())
}
You might also want to use the Action.async overload that provides a parsed body. For example, it might look like:
def createUser = Action.async(parse.urlFormEncoded) { request =>
//body is already treated as a Map[String, Seq[String]] because of the parameter passed to async
val user = request.body("user").head
Future(Ok())
}