title: how to get ng-admin filters working with loopback API
body: <p>I am new to ng-admin and angularjs. I am trying to integrate ng-admin with loopback for admin panel.</p>
  
  <p>I am unable to get ng-filters filters working with loopback 
  because of this i think the reference_list and other filter are not working properly.</p>
  
  <p>The problem is that i am unable to include <code>where</code> filter in my request to api
   i am trying to do it using restangular</p>
  
  <p>below is the code</p>
  
  <pre><code>// custom filters
  if (params._filters) {
      for (var filter in params._filters) {
          params['filter[where]'] = "{" + entry.field + ":"  + rams._filters[filter] + "}";
      }
      delete params._filters;
  }
  </code></pre>