Dojo如何从dojo.data.ItemFileReadStore获取JSON属性

我在typeData变量中有以下 JSON,然后将其放入dojo.data.ItemFileReadStore.我需要知道的是如何检查状态的值,是设置为“成功”还是其他一些值.我无法弄清楚如何从ItemFileReadStore获取状态值,任何帮助都将非常感激.

var typesData = {
        status: "success",
        label: "name",
        identifier: "value",
        items: [
            {value: 3, name: "Truck"},
            {value: 8, name: "Van"},
            {value: 6, name: "Car"},
            {value: 7, name: "Scooter"}
        ]
    };
var test = new dojo.data.ItemFileReadStore({ data: typesData });

ItemFileReadStore不会处理数据对象上的其他属性.但是,您可以扩展ItemFileReadStore以执行您需要的操作.你将重写’内部’方法,所以它是开发人员要小心.

dojo.declare("MyCustomStore", [Store], {
    _getItemsFromLoadedData: function(/* Object */ dataObject){
        this.serverStatus = dataObject.status;                     
        this.inherited(arguments);                            
    }
});

var typesData = {
    status: "success",
    label: "name",
    identifier: "value",
    items: [
        {value: 3, name: "Truck"},
        {value: 8, name: "Van"},
        {value: 6, name: "Car"},
        {value: 7, name: "Scooter"}
    ]
};
var test = new MyCustomStore({ data: typesData });
test._forceLoad(); // forces the processing of the data object

console.debug(test.serverStatus);

http://jsfiddle.net/cswing/dVGSc/