Ember data embedded has one relationship for ember-data.1.0.0

I am trying to serialize a user object and pass it to an ember client.

The user model has_one address model. There is no separate endpoint for just the address model so I can't just provide a foreign key id and sideload it.

The JSON received just includes address as an object and looks something like this:

{"user": 
   {
    "id":"2e168076-0bcb-4418-a183-aeb4600cbc46",
    "name":"Andrew,
    "address": 
      { 
        "id":"5e4af533-23f5-491b-98a8-fe8441c040c3",
         "addressable_id":"3",
         "street":"1,
         "country_code":"US"
      }
   }

On the ember side I have a user model

App.User = DS.Model.extend({
  name: DS.attr('string'),

  //hasOne via belongsTo as suggested by another SO post:
  //http://ift.tt/1xe8hDO
  address: DS.belongsTo('address'),
});

and an address model

App.Address = DS.Model.extend({
  addressable_id: DS.attr('string'),
  street: DS.attr('string'),
  country_code: DS.attr('string'),

  user: DS.belongsTo('user')
});

Currently running this code throw an error in the console:

TypeError: Cannot read property 'typeKey' of undefined 

which can be fixed by removing the

address: DS.belongsTo('address'),

line in the user model but then the relationship doesn't load properly.

Any help configuring this relationship would be greatly appreciated since it seems like any docs I find are outdated due to being more than an hour old.