gistfile1.js

store = Ext.create('Ext.data.Store', {
    fields: [
        'id',
        'model',
        'brand'
    ],
    proxy: {
        type: 'ajax',
        url: '/sagi/service/car',
        batchActions: false,
        api: {
            create: '/sagi/service/car/create',
            read: '/sagi/service/car',
            update: '/sagi/service/car/update',
            destroy: '/sagi/service/car/destroy',
        },
        reader: {
            type: 'json',
            root: 'data',
            idProperty: 'id'
        },
        writer: {
            type: 'json',
            encode: true,
            allowSingle: true,
            writeAllFields: true,
            root: 'data'
        }
    }
});
 
store.load({
    callback: function(records, operation, success) {
        if (success) {
            console.log(records)
        } else {
            console.log('server reported an error')
        }
    }
});

store.add({model: 'Hilux Vego', brand: 'Toyota'});

console.log(store.last().data);

store.getModifiedRecords()

store.sync()

store.getAt(2).set('model', 'Accord')

store.getModifiedRecords()

store.sync()