title: How do you get the id of an association in Ember without loading the association?
body: <p>I am trying to use the <a href="http://emberjs.com/api/classes/Ember.Select.html" rel="nofollow">Ember.Select</a> view class, and I am looking for a way to retrieve the id of an association without loading the full model. </p>
  
  <p>I am using Ember Data 1.0.0-beta.7. My property model looks like:</p>
  
  <pre><code>var attr = DS.attr;
  
  App.Property = DS.Model.extend({
      neighborhood: DS.belongsTo('neighborhood'),
      name: attr()
  });
  </code></pre>
  
  <p>An example of my payload looks like this:</p>
  
  <pre><code>{"property": neighborhood: 5, name: "Foo"}
  </code></pre>
  
  <p>I just need the id of the neighborhood in order to pass it to the select view value property so that it can be selected. I do not want to load the full neighborhood payload though because I only need the id. </p>
  
  <p>Is there a way to do this without changing my model?</p>