了解 : 怎么处理jobbox status drop down list roll back

that.onStatusEnumChange = function (toStatus) {
　　//设计理念是当completed 和 rejected 的状态下，是无法换状态
    if (toStatus == "completed" || toStatus == "rejected") {
        S.confirm("After status change to " + toStatus + ", it will not able to change back, are you sure ?", function () {
            updateStatus();
        }, function () {
            rollbackValue();
        });
    }
    else {
        updateStatus();
    }
　　//恢复资料
    function rollbackValue() {
        that.resourceClone.statusEnum = that.resource.statusEnum;
    }
    function updateStatus() { 
　　　　//new HttpObj 制作一个请求对象
        var updateStatushttpObj = new HttpObj({
            url: "//localhost:4745/api/Orders(" + that.resourceClone.id + ")/RPC.changeStatus",
            method: "POST",
            data: {
                toStatusEnum: that.resourceClone.statusEnum
            }
        });

　　　　//refreshAsyncHttpObj 制作一个请求对象，同时有promise（把回来的资源给覆盖回之前的资源）
        var refreshResourceHttpObj = that.resource.extend.refreshAsyncHttpObj();

　　　　//batchHttp 就是把所有请求对象给发出去
        batchHttp([updateStatushttpObj, refreshResourceHttpObj], {
            ajaxCommObject: {}
        }).then(function () {
            that.resourceClone = that.resource.extend.cloneForPut();
        }, function () {
            rollbackValue();
        });
    }
}