How to exclude properties from Swift 4's Codable

Question

Swift 4\'s new Encodable/Decodable protocols make JSON (de)serialization quite pleasant. However, I have not yet found a way to have fine-grained c

Answer 1

You can use computed properties:

struct Person: Codable {
  var firstName: String
  var lastName: String
  var nickname: String?

  var nick: String {
    get {
      nickname ?? ""
    }
  }

  private enum CodingKeys: String, CodingKey {
    case firstName, lastName
  }
}