Get server's answer after saving model - ember.js

Question

I use Ember data with a node js server; the model looks very simple:
Gmcontrolpanel.Product = DS.Model.extend({
name: DS.attr('string'),
description: DS.attr('string'),
});
Once the node server receives the product.save(), it persists the record in the mysql db, managing the record ID and answers like this:
{
product
{
id: 1,
name: "aaa",
description "bbb"
}
}
I need to get the id of the server's response (not the promise returned by save().then(), where id is null); how can i get it?
Update:
The node server, using express:
GMserver.post('/products', function (req, res) {
rootName = "product";
queryString = 'INSERT INTO products (id, name, descriptions ) VALUES ( '+ counters.prodcuts +', "' + req.body.product.name + '", "' + req.body.product.description + '")';
executeQuery(req, res, queryString);
responseToPost(counters.products, req.body.product, rootName, res);
counters.products++;
});
function executeQuery (req, res, querystring) {
connection.query(queryString, function(err, rows, fields){
if (err) throw err;
});
}
function responseToPost (id, data, rootName, res) {
var result = new Object();
result[rootName] = new Object();
var i = 0;
var answer;
result[rootName].id = id;
for(var key in data)
{
result[rootName][key] = data[key];
}
answer = JSON.stringify(result, null, '\t');
console.log(answer);
res.send(answer);
}
I can see by the log of answer here, that answer is the one written above;
I tried to change responseToPost to send always a static value like this:
result[rootName][key] = 'aaa';
but in Ember, doing
product.save().then(function(savedProduct) {
console.log(savedProduct.get('name'));
}
i get the sumbmitted value of name, not 'aaa' as I expected...
Second Update:
doing in Ember
product.save().then(function(savedProduct) {
console.log(savedProduct);
}
to see what savedProduct is, in Chrome i see the result of the log:
Class {id: null, store: Class, container: Container, currentState: (...), errors: Class…}
__ember1395755543625: "ember548"
__ember1395755543625_meta: Object
__nextSuper: undefined
_attributes: Object
_changesToSync: Object
_data: Object
__ember1395755543625_meta: Meta
_super: function superFunction(){
name: "asdf"
description: "asdfa"
__proto__: Object
_deferredTriggers: Array[0]
_inFlightAttributes: Object
_relationships: Object
_suspendedRelationships: false
_updatingRecordArraysLater: false
container: Container
currentState: (...)
get currentState: function () {
set currentState: function (value) {
data: (...)
errors: Class
id: null
isError: false
store: Class
toString: function () { return ret; }
__proto__: Object
where "asdf" and "asdfa" are the values i typed in the insert form on the app

Answer 1

The record should be updated if that's the JSON returned.
product.save().then(function(record){ //record is the same as product here
console.log(record.get('id'));
});