我将根据服务调用的响应在记录更新时添加一些警报。

当我检查响应中是否有任何数据时:

if (response.data === null)


这部分似乎没有得到遵守,并且显示了已成功更新记录的警报,并且如果您在屏幕快照中查看,则response.data为null。

我不确定简单的if是否无法正常工作,或者我是否正确地查看了响应对象。

有人可以帮忙,以便我了解如何执行此操作的最佳做​​法吗?

谢谢。

图片更新

javascript - AngularJS:当检查对象为null时,返回错误消息-LMLPHP

最佳答案

希望这将有助于解释为什么您没有得到期望的结果(阅读代码注释):

function boooooom(msg) {
    alert('We\'re sorry folks! ' + msg);
}

$http({
    method: 'PUT',
    url: 'api/StorePage/PutStorePage?StorePageId=' + this.newpage.StorePageID,
    data: storePage,
})
    .then(
        // This callback will be called when the response is *available*
        function(response) {
            // Change this to `response.data` instead of `!response.data`
            if (response.data) {
                $scope.pages = response.data;
                alert('Congrats!');
            } else {
                boooooom('No data');
            }
        },

        // This callback is called if an error occurs or if the server
        // returns a response with an *error* status.
        //
        // *Your* request hasn't caused an error as it *has* responded
        // and the response is a 200 status (which is not an error status)
        // so this callback doesn't get called.
        function(response) {
            boooooom('Houston we have a problem');
        }
    )
    // It looks like you always want to `clearFields` for both failure and success
    // so you can just do that here, which will do that for you.
    .finally(clearFields);

关于javascript - AngularJS:当检查对象为null时,返回错误消息,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/40185193/

10-12 12:40
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