javascript – 从json store extjs获取记录

我有一个json存储加载,我需要从中获取一条记录.
我用过：getAt(index),find(),getById(),但没有结果.
这是我的代码：

var appSettingReader = new Ext.data.JsonReader({     
                root: 'results',
              },[
                {name: 'id', type: 'int', mapping: 'id'},
                {name: 'projetId', type: 'int', mapping: 'projetId'},
                {name: 'resLevels', type: 'int', mapping: 'resLevels'},
                {name: 'maxResToLock',  type: 'int', mapping: 'maxResToLock'},
                {name: 'maxTimetoLock', type: 'int', mapping: 'maxTimetoLock'},
                {name: 'infosToPrint', type: 'string', mapping: 'infosToPrint'}
              ])

var appSettingStore = new Ext.data.Store({
                proxy: new Ext.data.HttpProxy({
                        url: 'inc/getSettings.PHP',
                        method: 'POST'
                    }),
                baseParams:{task: "app"}, 
                reader : appSettingReader,
                sortInfo:{field: 'id', direction: "DESC"}
               })

appSettingStore.load(); 

此代码返回undefined：

console.log(appSettingStore.getAt(0));

console.log(appSettingStore.find("id","1")); 

这是从服务器返回的json字符串：

{success:true,"results":[{"id":"1","projetId":"1","resLevels":"1","maxResToLock":"40","maxTimetoLock":"10","infosToPrint":"1_2_3_5","hotlineMail":"[email protected]"}]}

我也测试了这段代码：

var records = new Array()       
var test = appSettingStore.each(function(rec){
            records.push(rec)
         })
console.log(records)

我得到一个空数组！

PS：这个商店不受任何组件的约束;
我只想读写它.

解决方法:

您需要在商店上放置一个回调,它将在加载后触发.然后,您可以根据需要使用数据.

store.load({
    callback : function(r, options, success) {
        console.log(r.data)
    }
})