ios - Mantle - Transform String to Enum Value -

in user class, have defined type property , usertype enum. type property received string value in json:

{     "type" : "admin" } 

i use mantle transform string value usertype enum object , string during serialization , de-serialization, respectively. have searched through other posts , mantle documentation not working properly. here's attempt:

enum usertype:string {     case normal     case admin }  class user: mtlmodel, mtljsonserializing {     var type:usertype?      static func jsonkeypathsbypropertykey() -> [nsobject : anyobject]!     {         return ["type" : "type"]     }      static func jsontransformerforkey(key: string!) -> nsvaluetransformer!     {         if (key == "type")         {             return nsvaluetransformer(forname: "usertypevaluetransformer")         }          return nil     } }  // custom transformer class usertypevaluetransformer : nsvaluetransformer {     override func transformedvalue(value: anyobject?) -> usertype     {         let thevalue:string? = (value as? string)          return ((thevalue! == "admin") ? usertype.admin : usertype.normal)     }      override func reversetransformedvalue(value: anyobject?) -> anyobject?     {         let thevalue:usertype = (value as! usertype)          return ((thevalue == usertype.admin) ? "admin" : "normal")     } } 

in code above, made custom transformer converting string usertype enum value , back. have overridden mantle's jsontransformerforkey method , specified custom transformer type property in order perform conversion. when try serialize json user object, receive error message:

type not property of user 

type property of user model, going on making mantle not able recognize it.

what should change in implementation string enum conversion work? in advance help!

i go around problem way, using swift enumeration's raw values:

enum usertype: string {     case normal = "normal"     case admin = "admin" }  let string = "admin" let value = usertype(rawvalue:string) //returns .admin  let value = usertype.normal let string = value.rawvalue() //returns "normal"