Get Ember-Data REST response value

Question

Ember: 1.0.0-rc.6

Ember-Data: e999edb (2013-07-06 06:03:59 -0700)

I make a REST call (POST) to login a user. Server response is ok. I need the ID from the server, but i only got the ID with "setTimeout".

I think this is not the right way.

What is my mistake?

Within Controller i call:

var login = App.Login.createRecord(this.getProperties("email", "password"));

login.on("didCreate", function(record) {
  console.log(record.get("id"));     // ID is null
  console.log(record.get("email"));
});

setTimeout(function() {
  console.log(login.get("id"));     // ID is available
  console.log(login.get("email"));
}, 500);

DS.defaultStore.commit();

Answer 1

You're right -- there's a bug in ember-data where the materializeData event, which basically sets the id and unwraps the server response doesn't happen until AFTER the didCreate callback. So what's happening is that in your login.on("didCreate" ....) callback, the record still hasn't materialized yet.

This seems to still be an issue -- see this thread for more information: https://github.com/emberjs/data/issues/405#issuecomment-17107045

Workaround

Your work around is fine, but an easier (cleaner?) one is to wrap your callback actions in a Ember.run.next :

login.on("didCreate", function(record) {
  Ember.run.next(function() {
    console.log(record.get("id"));     // ID should be set
    console.log(record.get("email"));
  }
});

This way, at least you don't need to deal with the timeout.

I believe this works by delaying the actions until the next run loop, and by then the materialization should have already happened. More on the Ember run loop

Source: https://github.com/emberjs/data/issues/405#issuecomment-18726035