title: Ext.Data.Connection request result not rendering on grid?
body: <p>Ive been stuck with this issue for some time </p>
  
  <p>My JSon store fields need to retrieve some more info:</p>
  
  <pre><code> { name: "ExpirationDate", convert: convertDate },
   { name: "AffectedObject", convert: GetValue }, 
  </code></pre>
  
  <p>The date method is working fine but the result from GetValue is <strong>not</strong> being rendered on the grid even though the code is working and returning the correct value (either with or without JSON):</p>
  
  <pre><code>function GetValue(v) {
      var conn = new Ext.data.Connection();
      conn.request({
          url: 'test/GetObjectByID',
          method: 'POST',
          params: { id: v },
          scriptTag: true,
          success: function (response) {
              console.log(response.responseText);
              ReturnResult(response.responseText);
          },
          failure: function () {
              Ext.Msg.alert('Status', 'Something went wrong');
          }
      });
  
  
  function ReturnResult(str) {
      return Ext.util.JSON.decode(str.toString());
  }
  </code></pre>
  
  <p>Any idea why the result is not not showing?</p>