Ext4 未找到Model.js,该怎么解决

    <script language="javascript" type="text/javascript" src="@Url.Content("~/Scripts/ext-all.js")"></script>

    <link type="text/css" rel="Stylesheet" href="@Url.Content("~/Content/ext-all.css")" />

    <script type="text/javascript">

        Ext.Loader.setConfig({ enabled: true });  

        Ext.require([

                'Ext.grid.*',

                'Ext.data.*',

                'Ext.util.*',

                'Ext.state.*',

                'Ext.form.Panel'

                ]);

        Ext.onReady(function () {

            var isAdd = true; //默认是添加

            Ext.define('NewContent', {

                extend: 'Ext.data.Mode',

                fields:

                [

                'NewsCategoryID',

                'PublicDate',

                'NewsMainTitle',

                 'NewsSubTitle',

                'NewsSummary',

                'NewsListImage',

                 'NewsContent',

                'IsFocusNews',

                'FocusNewsImage',

                 'IsAllowComment',

                'IsPublicToMobileClient',

                'NewsStatus',

                'CreateDatetime'

                ]

            });



            var NewContentStore = Ext.create('Ext.data.Store', {

                model: 'NewContent',

                proxy: {