Ember.js data associations not saving

Question

Let's say I have 2 models:

App.Address = DS.Model.extend({
   street: DS.attr('string'),
   person: DS.belongsTo('App.Person')
})

App.Person = DS.Model.extend({
  name: DS.attr('string'),
  addresses: DS.hasMany('App.Address')
})

Now I create a person

App.person = App.Person.createRecord({name: 'Bill'});
App.store.commit();

If I try to add an address to the person like this

address = App.Address.createRecord({street: '123 Fake Street'});
App.person.get('addresses').pushObject(address);

and commit the transaction

App.store.commit();

The new address will be saved however the person object will not be recognized as changed; even though the list of ids has gone from

{
  ...
  "addresses": []
}

to

{
  ...
  "addresses": [3]
}

Is there a way to let ember-data know that my person object has been changed and it needs to be saved?

Edit: Here is a jsfiddle illustrating the problem.

Answer 1

As of now (ember-data revision 4) there is no way to do this. The object is only persisted on the belongsTo side since it has the foreign key, so if you set the value in the belongs to side of the relation it should persist. The next version of ember data should address this issue.

Answer 2

The work around I've found for this would be to just manually add the id like:

App.Address = DS.Model.extend({
   street: DS.attr('string'),
   personID: DS.attr('string'),
   person: DS.belongsTo('App.Person')
})

then when you send your data, set the personId field and it'll mimic what the person field seems like it should send.