title: Linked Combobox (filter store)
body: <p>you need when choosing to download a combobox <em>CountryComboBox</em> combobox <em>CityComboBox</em> list of products filtered by field *city_id*. My code works, but not the first time))
  Opt for the first combobox value - I go in the second - the filter does not apply. Click again on the first, again in the second - and that's only if it is applied. What am I doing wrong? And then make a filter for the output grid, as well as for the combobox?</p>
  
  <p>ExtJs 3.</p>
  
  <p>My Code:</p>
  
  <pre><code>tbar: [
  {
      xtype     : 'CountryComboBox', // expansion Ext.form.ComboBox
      listeners : {
          'select' : {
              fn : function(combo, value) {
                  var combobox_city = Ext.getCmp('ProductsProductTypeComboBoxForProduct');
                  combobox_city.enable();
                  combobox_city.clearValue();
                  combobox_city.store.filter('city_id', combo.getValue(), true); 
              }
          } 
      }
  },
  {
      xtype     : 'CityComboBox', // expansion Ext.form.ComboBox
      disabled  : true,
      listeners : {
          'select' : {
              fn : function(combo, value) {
                  this.store.filter('people_id', combo.getValue(), true);
              } 
          }
      }
  },  
  ... 
  </code></pre>