Ext.define('SimpleTasks.model.List', { extend: 'Ext.data.Model', fields: [ { name: 'id', type: 'int' }, { name: 'name' }, // if we are using local storage, we need to persist the index field so the ordering of tree nodes will be preserved {name: 'index', type: 'int', defaultValue: null, persist: !!SimpleTasksSettings.useLocalStorage} ], proxy: SimpleTasksSettings.useLocalStorage ? { type: 'localstorage', id: 'SimpleTasks-List' } : { type: 'ajax', api: { create: 'php/list/create.php', read: 'php/list/read.php', update: 'php/list/update.php', destroy: 'php/list/delete.php' }, reader: { type: 'json', messageProperty: 'message' } } });