title: Filter Firebase data using AngularJS
body: <p>i have a data in firebase like this:</p>
  
  <pre><code>firebase_data {
      -JGc5X37NDuvmJylmx0s: Object {
          name: 'John Doe',
          age: 21
      }
      -JGnGJlTjyAxFT-Vn48Y: Object {
          name: 'Jane Doe',
          age: 22
      }
  }
  </code></pre>
  
  <p>in my controller:</p>
  
  <pre><code>$scope.firebase = $firebase(new Firebase("https://firebase_data.firebaseio.com"));
  </code></pre>
  
  <p>my view:</p>
  
  <pre><code>&lt;input type="text" ng-model="search" /&gt;
  &lt;ul ng-repeat="(key, value) in firebase | filter:search"&gt;  
      &lt;li&gt;&lt;a href="{{ key }}"&gt;{{ value.name }}&lt;/a&gt;&lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>
  
  <p>the filter is not working. how can i make the filter work?</p>