ExtJs4.1 Proxy Api的使用

Ext.define('User', {
extend: 'Ext.data.Model',
fields: [
              {name: 'id',  type: 'string'},
              {name: 'roleName',   type: 'string'},
              {name: 'createDate'},
              {name: 'state'}
          ],
proxy: {
type: 'ajax',
api: {
create  : 'proxyApiController.do?method=create',
read    : 'proxyApiController.do?method=create',
update  : 'proxyApiController.do?method=update',
destroy : 'proxyApiController.do?method=create'
          },
writer: {
type: "json",
encode: true,
allowSingle: false,
root: "data"
              }
          }
      });