store.each不工作

Question

我正在研究extjs3.2 Grid。我有一个商店，如下面的链接

所述

http://loianegroner.com/2010/09/extjs-spring-mvc-3-and-hibernate-3-5-crud-datagrid-example/

var store = new Ext.data.Store({
                    id : 'user',
                    proxy : proxy,
                    reader : reader,
                    writer : writer, // <-- plug a DataWriter into the store
                    url: 'aaa/view.action',
                    remoteSort: true,


                    autoSave : false
                // <-- false would delay executing create, update, destroy
                // requests until specifically told to do so with some [save]
                // buton.
                }); 

但是，当我使用商店时，它不起作用

store.each(function(r) {
            alert(r.get('col'));
               })