创建模型，设置id

/** 
         * 创建模型，设置id
         */  
         Ext.onReady(function(){
             Ext.define('Person',{
                extend:'Ext.data.Model',
                idProperty:'personId',
                fields:[
                    {name:'name',type:'string'},
                    {name:'age',type:'int'}
                ]
            });
            var person1 = new Person({
                personId:'person1',
                name:'zhouhai',
                age:12,
            });
            var person2 = new Person({
                personId:'person2',
                name:'zhouhai',
                age:12,
            });
            //这个地方还不能 直接的person.name
            //person.set({name:'hello'});

            //alert(person.get('name'));
            console.log(person1);

            console.log(person2);
        });