Parse.com and ExtJS 5 base model

model_Base.js

Ext.define('MyApp.model.Base', {
  extend: 'Ext.data.Model',

  fields: [
    {
      name: 'objectId',
      type: 'string'
    }
  ],

  schema: {
    namespace: 'MyApp.model',

    proxy: {
      type: 'rest',
      url: 'https://api.parse.com/1/classes/{entityName}',
      reader: {
        type: 'json',
        rootProperty: 'results'
      },
      headers: {
        'X-Parse-Application-Id': 'XXX',
        'X-Parse-REST-API-Key': 'XXX'
      }
    }
  }
});