Extjs4 Chained combos

Question

I've a set of 2 combo boxes. One is countries combo and another is states combo. By default the states combo store is empty when I select a country then based on the combo value field States combo has to be filtered/load according to the first combo. In Extjs2.0 this is working whats the changes in Extjs4.

country store

var country_store = Ext.create('Ext.data.Store', {
    //autoLoad: true,
    fields: ['id','c_id','c_name'],
    proxy: {
        type: 'ajax',
        url: 'country_list.php',
        reader: {
           type:'json',
           root: 'results'
        }
    },
    storeId: 'edu_context_store'
});

State store

var state_name = Ext.create('Ext.data.Store', {
autoLoad: true,
fields: ['id','s_id','s_name','parent_country_id'],
proxy: {
    type: 'ajax',
    url: 'states_list.php',
    reader: {
       type:'json',
       root: 'results'
    }
},
storeId: 'state_name'

});

Combo boxes

{
            xtype: 'combo',
            id: 'country_combo',
            hiddenName: 'country_name',
            displayField: 'c_name',
            valueField: 'c_id',
            fieldLabel: 'Country',
            queryMode: 'remote',
            allowBlank: false,
            triggerAction: 'all',
            store: country_store,
            width: 450,
            selectOnFocus: true,
            listeners:{
            scope: this,
            'select': function(combo, rec, idx){
               var country_val = combo.getRawValue();
               var states_obj = Ext.getCmp('states_combo');        
                        states_obj.clearValue();
                        //states_obj.store.load();
                        states_obj.store.filter('parent_country_id', country_val);


            }                           
        }

        }, {
            xtype: 'combo',
            id: 'states_combo',
            hiddenName:'state_name',
            displayField:'s_name',
            valueField:'s_id',
            queryMode: 'remote',
            fieldLabel: 'State',
            cls: 'textlineht',
            allowBlank: false,
            triggerAction: 'all',
            store: states_store,
            width: 450

        }

Anyone knows how to do that ?

Thanks !

Answer 1

combo.getRawValue() will return the value displayed to the user in the combo - not the underlying id value. Try instead combo.getValue().