gistfile1.js

store = Ext.create('Ext.data.Store', {
    fields: [
        'id',
        'model',
        'brand'
    ],
    proxy: {
        type: 'ajax',
        url: '/sagi/service/car',
        reader: {
            type: 'json',
            root: 'data',
            idProperty: 'id'
        }
    }
});

store.load({
    callback: function(records, operation, success) {
        if (success) {
            console.log(records)
        } else {
            console.log('server reported an error')
        }
    }
})