Using enum as property of Realm model

Dave Long picture Dave Long · Mar 18, 2015 · Viewed 18.1k times · Source

Is it possible to use an Enum as a property for my model? I currently have a class like this:

class Checkin: RLMObject {
  dynamic var id: Int = 0
  dynamic var kind: String = "checked_in"
  var kindEnum: Kind = .CheckedIn {
    willSet { self.kind = newValue.rawValue }
  }

  enum Kind: String {
    case CheckedIn = "checked_in"
    case EnRoute = "en_route"
    case DroppedOff = "dropped_off"
  }
  ....
}

It works okay, but I'd like to be able to have the kind property be the Enum and have Realm automatically call .rawValue on the property when it is saving an object to the store. Is this possible in Realm or is there a feature request already out there for it?

Answer

jpsim picture jpsim · Mar 19, 2015

You should override your kindEnum's setter and getter for this case:

enum Kind: String {
  case CheckedIn
  case EnRoute
  case DroppedOff
}

class Checkin: Object {
  @objc dynamic var id = 0
  var kind = Kind.CheckedIn.rawValue
  var kindEnum: Kind {
    get {
      return Kind(rawValue: kind)!
    }
    set {
      kind = newValue.rawValue
    }
  }
}