Ext级联ComboBox: this.proxy is undefined

Question

Firebug控制台输出：
this.proxy is undefined
SimpleStore()(Object params=Object)ext-all.js （行 43）
initComponent()("", true)ext-all.js （行 129）
initComponent()()ext-all.js （行 129）
camelFn()()ext-all.js （行 13）
getViewWidth()()ext-base.js （行 10）
[Break on this error] Ext.data.Store=function(A){this.data=new....data=C;this.resumeEvents();return B}});

js代码
[code="js"]
var root_arr = parent.getrootarr();
var classstore = new Ext.data.SimpleStore({
fields: ['id', 'class', 'parentId'],
data : root_arr
});

var combo = new Ext.form.ComboBox({
    xtype:'combo',
    store: classstore,
    displayField:'class',
    typeAhead: true,
    mode: 'local',
    forceSelection: true,
    fieldLabel: '选择类别',
    triggerAction: 'all',
    emptyText:'选择一个类别...',
    selectOnFocus:true,
    listeners:{select:function(combo, record, index){
            var value = record.get('id'); 
            console.log(value);
            /*classstore.filter('id',codeHead); 
            var newStore = new Ext.data.SimpleStore({fields: ['id', 'class','parentId']});  
            newStore.add(classstore.getRange());*/ 
            var comboSub = Ext.getCmp('subclass'); 
            if(!value){

                           comboSub.setRawValue('');
                           comboSub.disable();
                           return;
                       }
                       comboSub.enable();
                       comboSub.reset();
            comboSub.clearValue();
            [color=red]comboSub.store.filter('parentId',value,true);[/color]


}}

});



var comboSub = new Ext.form.ComboBox({
    xtype:'combo',
    fieldLabel: '子类别',
    id:'subclass',
    store: new Ext.data.SimpleStore({
            fields: ['id', 'class', 'parentId'],
            data :  subclass_arr
        }),
    displayField:'class',
    typeAhead: true,
    mode : 'remote',
    disabled : true,
    forceSelection: true,
    fieldLabel: '选择类别',
    triggerAction: 'all',
    emptyText:'选择一个子类别...',
    selectOnFocus:true
});

[/code]

Answer 1

mode : 'local', 应该可以