Play Framework Boolean Formatter

forms.scala

implicit val booleanFormatter: Formatter[Boolean] = new Formatter[Boolean] {

  override val format = Some(("format.boolean", Nil))

  override def bind(key: String, data: Map[String, String]): Either[Seq[FormError], Boolean] =
    data.get(key) match {
      case Some(value) => value match {
        case "true" => Right(true)
        case "false" => Right(false)
        case _ => Left(Seq(FormError(key, "error.boolean", Nil)))
      }
      case _ => Left(Seq(FormError(key, "error.boolean.empty", Nil)))
    }

  override def unbind(key: String, value: Boolean): Map[String, String] = Map(key -> value.toString)
}