Enum serialization and deserialization

[Maik B]

In our model we have a gender enumeration defined like so:

object Gender extends Enumeration {
  type Gender = Value
  val Male = Value(0, "male")
  val Female = Value(1, "female")
  val Other = Value(2, "other")

  implicit val genderFormat = new PFormat[Gender.Value] {
    def reads(json: JsValue) = JsSuccess(Gender.withName(json.as[String]))
    def writes(myEnum: Gender.Value) = JsString(myEnum.toString)
  }
}

case class User(userName: String,
  firstName: Option[String] = None,
  lastName: Option[String] = None,
  gender: Option[Gender.Value] = None,
  imageUrl: Option[String] = None,
  tel: Option[String] = None,
  override val id: Long = 0L) extends ActiveRecord with Datestamps

Using this code, the following test fails

"persist the gender correctly" in {
      val userGender = Some(Gender.Other)
      val user = User("name", gender = userGender)
      user.gender mustEqual userGender
      user.save()

      User.where(_.userName === "name").head.gender mustEqual userGender

After calling the save() method, the gender field in the user becomes a Some(2) instead of a Some(Gender.Other)

Can you please help us on that? I read that squeryl handles enums properly.