title: Django and Extjs, how to use combo with jsonstore
body: <p>I want to display an extjs combo with a JsonStore
  Server side I use python/Django.</p>
  
  <p>So, this is my combo:</p>
  
  <pre><code>xtype: 'combo',
  store: new Ext.data.JsonStore({
      url: 'get_peoples',
      root: 'data',
      totalProperty: 'total',
      fields: [
          {name: 'name', mapping: 'fields.name'},
          {name: 'subname', mapping: 'fields.subname'}
      ],
      autoLoad: true
  }),
  trigerAction: 'all'
  </code></pre>
  
  <p>and the views.py server side:</p>
  
  <pre><code>def get_peoples(request):
      queryset = People.objects.all()    
      data = '{"total": %s, "%s": %s}' % \
          (queryset.count(), 'data', serializers.serialize('json', queryset))
      return HttpResponse(data, mimetype='application/json')
  </code></pre>
  
  <p>the get_people call give me </p>
  
  <pre><code>{"total": 1, "data": [{"pk": 1, "model": "myapp.people", "fields": {"name": "Paul", "subname": "Di Anno"}}
  </code></pre>
  
  <p>I think i'm not doing it right, cause my combo doesn't display any item</p>