Scala Play Enum Id to Json Reads & Writes

playEnumIdJson.scala

object OkexStatus extends Enumeration {
  type OkexStatus = Value
  val filled = Value(1)
  val unfilled = Value(0)

  implicit val enumFormat = new Format[OkexStatus] {
    override def reads(json: JsValue): JsResult[OkexStatus] = json.validate[Int].map(OkexStatus(_))
    override def writes(enum: OkexStatus) = JsNumber(enum.id)
  }
}