ReactiveMongo : How to write macros handler to Enumeration object? - scala-2.10

Question

I use ReactiveMongo 0.10.0, and I have following user case class and gender Enumeration object:
case class User(
_id: Option[BSONObjectID] = None,
name: String,
gender: Option[Gender.Gender] = None)
object Gender extends Enumeration {
type Gender = Value
val MALE = Value("male")
val FEMALE = Value("female")
val BOTH = Value("both")
}
And I declare two implicit macros handler:
implicit val genderHandler = Macros.handler[Gender.Gender]
implicit val userHandler = Macros.handler[User]
but, when I run application, I get following error:
Error:(123, 48) No apply function found for reactive.userservice.Gender.Gender
implicit val genderHandler = Macros.handler[Gender.Gender]
^
Error:(125, 46) Implicit reactive.userservice.Gender.Gender for 'value gender' not found
implicit val userHandler = Macros.handler[User]
^
Anybody know how to write macros handler to Enumeration object?
Thanks in advance!

Answer 1

I stumbled upon your question a few times searching for the same answer. I did it this way:
import myproject.utils.EnumUtils
import play.api.libs.json.{Reads, Writes}
import reactivemongo.bson._
object DBExecutionStatus extends Enumeration {
type DBExecutionStatus = Value
val Error = Value("Error")
val Started = Value("Success")
val Created = Value("Running")
implicit val enumReads: Reads[DBExecutionStatus] = EnumUtils.enumReads(DBExecutionStatus)
implicit def enumWrites: Writes[DBExecutionStatus] = EnumUtils.enumWrites
implicit object BSONEnumHandler extends BSONHandler[BSONString, DBExecutionStatus] {
def read(doc: BSONString) = DBExecutionStatus.Value(doc.value)
def write(stats: DBExecutionStatus) = BSON.write(stats.toString)
}
}
You have to create a read/write pair by hand and populate with your values.
Hope you already solved this issue given the question age :D