title: Ember.js: how to get notified when both model AND relationships have loaded?
body: <p>With the new async router and Ember Data, <code>setupController</code> will only be called once the model has loaded since the <code>model</code> hook will call <code>App.Foo.find(id)</code> which is a promise (<a href="http://emberjs.com/guides/routing/asynchronous-routing/" rel="nofollow">http://emberjs.com/guides/routing/asynchronous-routing/</a>).</p>
  
  <p>But is there a way to not only wait for the model itself to load, but its relationships as well?</p>
  
  <p>I have route where the model has "childs". I need both the model and childs to be loaded before the transition can continue.</p>