Ember.computed.oneWay()

Where computed.alias aliases get and set, and allows for bidirectional data flow, computed.oneWay only provides an aliased get. The set will not mutate the upstream property, rather causes the current property to become the value set. This causes the downstream property to permanently diverge from the upstream property.

Example

let User = Ember.Object.extend({
  firstName: null,
  lastName: null,
  nickName: Ember.computed.oneWay('firstName')
});

let teddy = User.create({
  firstName: 'Teddy',
  lastName:  'Zeenny'
});

teddy.get('nickName');              // 'Teddy'
teddy.set('nickName', 'TeddyBear'); // 'TeddyBear'
teddy.get('firstName');             // 'Teddy'