title: Extjs form : load data
body: <p>I want to load json data into form.</p>
  
  <p>my json :</p>
  
  <pre><code>{
      "success": "true",
      "data": {
          "operation[id]": "1199",
          "operation[startdate]": "2011-10-04 08:00:00",
          "operation[starthour]": "08:00",
          "operation[enddate]": "2011-10-04 18:00:00",
          "operation[endhour]": "18:00",
          "operation[year]": "2011",
          "operation[abscomment]": "",
          "operation[person_id]": "13",
          "operation[Mission]": {
              "id": "1",
              "operation_id": "1199",
              "subject": null
          }
      }
  }
  </code></pre>
  
  <p>It works with key like operation[id] but not with operation[Mission][id].</p>
  
  <p>In my form :</p>
  
  <pre><code>{
    xtype: 'textfield',
    fieldLabel: 'Subject',
    name:'operation[Mission][subject]',
    anchor: '50%',
    margin: '15 10 5 10',
    allowBlank: false,
    blankText:'required'
  },
  </code></pre>