Ember Data One to One Relationship Record Creation Fails - json

Question

I receive the following error when I use Ember Data to create records from a JSON response. What gives? I am following what the docs state.
Uncaught Error: Assertion Failed: Ember Data expected a number or string to represent the record(s) in the `user` relationship instead it found an object. If this is a polymorphic relationship please specify a `type` key. If this is an embedded relationship please include the `DS.EmbeddedRecordsMixin` and specify the `user` property in your serializer's attrs object.
JSON being parsed:
[
{
"id": 76,
"title": "Title",
"shipped": 0,
"date": "2015-05-21T05:00:00.000Z",
"user": {
"firstName": "First Name",
"lastName": "Last Name",
"email": "hellothere#gmail.com",
"id": 1
}
}
]
Shipment Model:
import DS from 'ember-data';
export default DS.Model.extend({
title: DS.attr('string'),
user: DS.belongsTo('user', { async: false })
});
Route:
import Ember from 'ember';
export default Ember.Route.extend({
beforeModel: function() {
if(!localStorage.accessToken) {
this.transitionTo('login');
}
},
model: function() {
var shipmentObjects = [];
var App = this;
Ember.$.getJSON('http://localhost:1337/subscription/1/shipments/upcoming', function(shipments) {
shipments.forEach(function(data) {
var shipment = App.store.push('shipment', data);
shipmentObjects.pushObject(shipment);
});
});
return shipmentObjects;
}
});

Answer 1

You can create a custom serializer, if you can't modify your json response and manage to arrange data in other way
App.MODELNAMESerializer = DS.ActiveModelSerializer.extend({
extract: function(store, type, payload, id, requestType){
var shipments = [];
//CREATE A NEW PAYLOAD THAT EMBER CAN READ
var _payload = { };
return this._super(store, type, _payload, id, requestType);
}
});
Your json should look something like this
{
shipments: [
{
"id": 76,
"title": "Title",
"shipped": 0,
"date": "2015-05-21T05:00:00.000Z",
"user_id": 1,
}
],
"users": [
{
"firstName": "First Name",
"lastName": "Last Name",
"email": "hellothere#gmail.com",
"id": 1
}
]
}

Answer 2

Read the error message. It could hardly be clearer. By default, Ember Data expects an association to be represented by an ID. If the association is instead embedded, you must tell Ember Data that. You'll need something like:
// serializers/shipment.js
export default ApplicationSerializer.extend(DS.EmbeddedRecordsMixin, {
attrs: {
user: { embedded: 'always' }
}
});
And remove the {async: false}, since the data is embedded right there.
See http://emberjs.com/api/data/classes/DS.EmbeddedRecordsMixin.html.