Is it possible to decode single level JSON into 2 separate models?

Question

I have a JSON response that contains information about a user.

{
  "userId": "123456789",
  "email": "\"[email protected]",
  "firstName": "\"foo\"",
  "lastName": "\"bar\"",
  "name": "\"foo bar",
  "bio": "\"boo baz\"",
  "age": "42"
}

I'd like to create 2 models, User and Profile from the same JSON, with a single request.

I'd then like Profile to be a property on the User struct.

At the moment, my standard struct looks like this -

struct User: Codable, Equatable {
    var userId: String
    var email: String
    var firstName: String
    var lastName: String
    var name: String?
    var bio: String?
    var age: Int?
}

I would prefer however to do something like this -

struct User: Codable, Equatable {
    var userId: String
    var email: String
    var profile: UserProfile // I'd like to wrap the profile info up in this field
}

struct UserProfile: Codable, Equatable {
    var firstName: String
    var lastName: String
    var name: String?
    var bio: String?
    var age: Int?
}

As profile does not exist on the response, I do not understand how I can decode the rest of the response into it.

nodediggity · Accepted Answer · 2019-11-23 08:13:07Z

Firstly, you should consider making all of the fields on your model immutable.

It is good practice not to change your data, but create an updated copy.

However, this should work -

let json = Data("""
 {
   "userId": "123456789",
   "email": "[email protected]",
   "firstName": "foo",
   "lastName": "bar",
   "name": "foo bar",
   "bio": "boo baz",
   "age": 42
 }
""".utf8)

struct User: Codable, Equatable {
    let userId: String
    let email: String
    let profile: UserProfile

    init(from decoder: Decoder) throws {
        let values = try decoder.container(keyedBy: CodingKeys.self)
        userId = try values.decode(String.self, forKey: .userId)
        email = try values.decode(String.self, forKey: .email)
        profile = try UserProfile(from: decoder)
    }

}

struct UserProfile: Codable, Equatable {
        let firstName: String
        let lastName: String
        let name: String?
        let bio: String?
        let age: Int?
}

var result = try! JSONDecoder().decode(User.self, from: json)
print(result.profile)

Collectives™ on Stack Overflow

Is it possible to decode single level JSON into 2 separate models?

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related