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Scala serialization exception with Enumeration Value parameter

I am using the play 2.1 platform for scala and the MongoDB Salat plugin.

When I update Enumeration.Value, I got an exception:

java.lang.IllegalArgumentException: can't serialize class scala.Enumeration$Val
    at org.bson.BasicBSONEncoder._putObjectField(BasicBSONEncoder.java:270) ~[mongo-java-driver-2.11.1.jar:na]
    at org.bson.BasicBSONEncoder.putIterable(BasicBSONEncoder.java:295) ~[mongo-java-driver-2.11.1.jar:na]
    at org.bson.BasicBSONEncoder._putObjectField(BasicBSONEncoder.java:234) ~[mongo-java-driver-2.11.1.jar:na]
    at org.bson.BasicBSONEncoder.putObject(BasicBSONEncoder.java:174) ~[mongo-java-driver-2.11.1.jar:na]
    at org.bson.BasicBSONEncoder.putObject(BasicBSONEncoder.java:120) ~[mongo-java-driver-2.11.1.jar:na]
    at com.mongodb.DefaultDBEncoder.writeObject(DefaultDBEncoder.java:27) ~[mongo-java-driver-2.11.1.jar:na]

The Enumeration.Value insert works fine. My case class is as follows:

case class User(
    @Key("_id") id: ObjectId = new ObjectId,
    username: String,
    email: String,
    @EnumAs language: Language.Value = Language.DE,
    balance: Double,
    added: Date = new Date)

and my update code:

object UserDAO extends ModelCompanion[User, ObjectId] {

    val dao = new SalatDAO[User, ObjectId](collection = mongoCollection("users")) {}

    def update(): WriteResult = {
        UserDAO.dao.update(q = MongoDBObject("_id" -> new ObjectId(id)), o = MongoDBObject("$set" -> MongoDBObject("language" -> Language.EN))))
    }
}

Any ideas how to do this?

EDIT:

workaround: it works if I use Enumeration.Value toString, but this is not the way it should be ...

UserDAO.dao.update(q = MongoDBObject("_id" -> new ObjectId(id)), o = MongoDBObject("$set" -> MongoDBObject("language" -> Language.EN.toString))))
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3 answers

Salat , , MongoDB. mongo api @EnumAs. ( , salat, , User.language - > MongoDBObject?)

, , . "" , .

+1

BSON- Enumeration. , .

RegisterConversionHelpers()
  custom()
  def custom() {
    val transformer = new Transformer {

      def transform(o: AnyRef): AnyRef = o match {
        case e: Enumeration$Val => e.toString
        case _ => o
      }
    }
    BSON.addEncodingHook(classOf[Enumeration$Val], transformer)
  }
}
+3

mongoDB scala enums, .

, :

object EmployeeType extends Enumeration {
  type EmployeeType = Value
  val Manager, Worker = Value
}

mongodb:

import EmployeeType._
case class Employee(
  id: ObjectId = new ObjectId
)

mongoDB :

case class Employee(
  id: ObjectId = new ObjectId,
  employeeTypeIndex: Integer = 0
){
  def employeeType = EmployeeType(employeeTypeIndex); /* getter */
  def employeeType_=(v : EmployeeType ) = { employeeTypeIndex= v.id} /* setter */
}

.

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