title: Displaying a dynamic list of objects from the store
body: <p>Say I have the object:</p>
  
  <pre><code>var Foo = DS.Model.extend({
    name    : DS.attr('string'),
    is_baz  : DS.attr('boolean')
  });
  </code></pre>
  
  <p>During a session with the application, foo objects will be added and deleted, and will toggle their <code>is_baz</code> flag.</p>
  
  <p>In a template, I need to show the list of all Foos that are <code>is_baz == true</code>. As the list of foo objects in the store mutates, the displayed list should update dynamically. Hopefully using the store as the single source of information about foos.</p>
  
  <p>I haven't any seen examples of observing a recordArray for changes to the contained objects. How would we go about doing this in ember?</p>