Parsing nested Records in Immutable.js

Question

Suppose I have the following Records defined using Immutable.js:

var Address = Immutable.Record({street: \'\', city: \'\', zip: \'\'});
var User = Immutable.Reco         


        

Answer 1

You can make User subclass the Record definition and parse address in the constructor:

import {Record} from 'immutable'

const Address = Record({street: '', city: '', zip: ''});
class User extends Record({name: '', address: new Address()}) {
  constructor({name, address} = {}) {
    super({name, address: new Address(address)})
  }
}

const user = new User({
  name: 'Andy',
  address: {
    street: 'wherever',
    city: 'Austin',
    zip: 'TX'
  }
})

console.log(user)
console.log('user.address instanceof Address:', user.address instanceof Address)

const user2 = new User({name: 'Bob'})

console.log(user2)
console.log('user2.address instanceof Address:', user2.address instanceof Address)

Output:

User { "name": "Andy", "address": Record { "street": "wherever", "city": "Austin", "zip": "TX" } }
user.address instanceof Address: true
User { "name": "Bob", "address": Record { "street": "", "city": "", "zip": "" } }
user2.address instanceof Address: true