Object Mapper making my values to optionals

Question

struct User: Mappable {

  init?(map: Map) {

  }

  mutating func mapping(map: Map) {
    token <- map["token"]
    email <- map["email"]
  }

  var token : String!
  var email : String!
}

I'm declaring my strings as conditionally wrapped so that I can use directly with out wrapping, but after mapping all my strings to access I need to wrap again?

Why do need to wrap again?

because you don't know if there was a value in JSON, what should be there? if there is no value and it can not be a nil? — Lu_, Apr 04 '17 at 11:51
reflecting on reflection https://developer.apple.com/swift/blog/?id=37 — Leo Dabus, Apr 04 '17 at 11:55
So i don't have an option to say my value will definitely exists — siva krishna, Apr 05 '17 at 07:02

score 3 · Answer 1 · answered Jun 15 '17 at 10:12

You don't need the wrapping if you check the values in the initializer, something like this will work.

struct User: Mappable {

    var token: String
    var email: String

    init?(map: Map) {
        guard let token: String = map["token"].value(),
              let email: String = map["email"].value() else {

          print("User should have token and email")
          return nil
        }

        self.token = token
        self.email = email
    }

    mutating func mapping(map: Map) {
        token <- map["token"]
        email <- map["email"]
    }
}

Now you can use token and email in your code without wrapping

Object Mapper making my values to optionals

1 Answers1