type mismatch; found : Int required: String when trying to persist the form data in play framework - scala

Question

I have a model as follows:
case class User(username: String, email: String) {
var id:Int = User.nextId
}
object User {
protected var currentId = 0
def nextId: Int = {
currentId += 1
currentId
}
}
And my Controller looks like this:
object Users extends Controller {
val users: scala.collection.mutable.Map[String, User] = new HashMap
val form = Form(
mapping(
"username" -> text,
"email" -> text
)(User.apply)(User.unapply))
def add = Action {
Ok(views.html.users.add(form))
}
def save = Action{
implicit request =>
val user = form.bindFromRequest.get
users.put(user.id, user)
Ok("contact saved")
}
}
But when I compile the code my browser throws an error telling there is a miss match in the type that is accepted by the users.put(user.id, user).
The error message looks as follows:
When I change the type of the id as string then it will work but I want to keep my id as integer and not string.
Is there any way I can achieve this. I am using play framework 2.11.1.
What is that I am missing. Any help would be greatly appreciated since I am new to play framework.

Answer 1

users is a map from String to User.
val users: scala.collection.mutable.Map[String, User] = new HashMap
The put method expects a key of type String and a value of type User, but you tried to use it with a key of type Int.
You need to change your map to the type
scala.collection.mutable.Map[Int, User]
or instead you could use a value of type String as key.