Extjs 4.1:Ext.data。存储记录不会加载到第二个Ext.data中。百货商店

Ext.define('App.model.Product', {
    extend: 'Ext.data.Model',
    alias: 'model-product',
    idgen: 'sequential',
    fields: [
        { name: 'available', type: 'boolean', useNull: false, defaultValue: true },
        { name: 'country', type: 'int', useNull: false },
        { name: 'key', type: 'string', useNull: false },
        { name: 'name', type: 'string', useNull: false }
    ],
    proxy: {
        type: 'memory',
        reader: {
            type: 'json',
            root: 'products'
        }
    }
});

Ext.define('App.store.Product', {
    extend: 'Ext.data.Store',
    autoLoad: false,
    autoSync: false,
    groupField: 'id',
    countryFilter: function(countryId) {
        this.clearFilter();
        this.filter('country', countryId);
        return this;
    },
    getRecordsForCountry: function (countryId) {
        var records = [];
        this.findBy(function (record) {
            if (record.get('country') === countryId) {
                records.push(record.copy());
            }
        });
        return records;
    },
    model: 'App.model.Product',
    sorters: [ {
        property: 'key',
        direction: 'ASC'
    } ],
    sortOnLoad: true
});

Ext.onReady(function () {
    var data = {
        products: [{
            country: 1,
            key: 'test1',
            name: 'Test1'
        }, {
            country: 2,
            key: 'test2',
            name: 'Test2'
        }, {
            country: 3,
            key: 'test3',
            name: 'Test3'
        }]
    };

    var store = Ext.create('App.store.Product');
    store.loadRawData(data, false);
  
    var store2 = Ext.create('App.store.Product'),
    records = store.getRecordsForCountry(1);
    store2.add(records);
    //tried also:
    //store2.loadRecords(records);
    //store2.loadData(records);
    //store2.loadRawData(records);

    var combobox = Ext.create('Ext.form.field.ComboBox', {
        queryMode: 'local',
        forceSelection: true,
        displayField: 'name', // <-- Add this 
        valueField: 'key',
        renderTo: Ext.getBody(),
        store: store
    });
    var combobox2 = Ext.create('Ext.form.field.ComboBox', {
        queryMode: 'local',
        forceSelection: true,
        displayField: 'name', // <-- Add this 
        valueField: 'key',
        renderTo: Ext.getBody(),
        store: store2
    });
});

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