Question

我有一个ajax电话，如

    $.ajax({
        type: 'POST',
        url: 'addVideo',
        data: {
            video_title: title,
            playlist_name: playlist,
            url: id
            // csrfmiddlewaretoken: '{{ csrf_token }}',
        },
        done: bootstrap_alert.success('video saved successfully'),
        fail: bootstrap_alert.error('There were some errors while saving the video. Please try in a while')
    });

和

的行动

// setting up alerts on action
bootstrap_alert = function() {}
bootstrap_alert.success = function(message) {
  $('#feature').prepend('<div class="alert alert-success"><a class="close" data-dismiss="alert">×</a><span>'+message+'</span></div>');
}
bootstrap_alert.error = function(message) {
  $('#feature').prepend('<div class="alert alert-error"><a class="close" data-dismiss="alert">×</a><span>'+message+'</span></div>');
}

当前端进行ajax呼叫时，我同时看到两个通知

video saved successfully
There were some errors while saving the video. Please try in a while

我是不是正确地进行了ajax调用？

更新
将done更改为success会导致相同的行为

// send the data to the server using .ajax() or .post()
        $.ajax({
            type: 'POST',
            url: 'addVideo',
            data: {
                video_title: title,
                playlist_name: playlist,
                url: id
                // csrfmiddlewaretoken: '{{ csrf_token }}',
            },
            success: bootstrap_alert.success('video saved successfully'),
            fail: bootstrap_alert.error('There were some errors while saving the video. Please try in a while')
        });

服务器响应为HTTP/1.0" 200 3200，我认为fail不应该被调用

Answer 1

这些值应该是函数，回调。但是，你正在做的是马上打电话给他们。用匿名函数包装你的回调。

$.ajax({
  type: 'POST',
  url: 'addVideo',
  data: { video_title: title, playlist_name: playlist, url: id }
}).done(function(){
  bootstrap_alert.success('video saved successfully');
}).fail(function(){
  bootstrap_alert.error('There were some errors while saving the video. Please try in a while');
});

Answer 2

始终会调用

done。这应该发生。您应该在success属性中处理您的成功代码。

Answer 3

您需要将其包装在匿名函数中（正如其他人所说）。但是，我没有看到有人提到为什么（我认为值得一提）。

您需要执行此操作的原因是因为javascript将冒号右侧的评估分配给左侧。为了评估右侧，它需要首先运行您的功能。但是如果在右侧有一个匿名函数，它将函数本身定义为左侧引用的值（在javascript中，变量的值可以是函数）并将函数指定为左侧side（现在是函数的引用）。因此，它会延迟评估（运行函数），直到你的ajax调用完成。

Answer 4

这样改变

// send the data to the server using .ajax() or .post()
        $.ajax({
            type: 'POST',
            url: 'addVideo',
            data: {
                video_title: title,
                playlist_name: playlist,
                url: id
                // csrfmiddlewaretoken: '{{ csrf_token }}',
            },
            success: function(response, textStatus, jqXHR){
                 // log a message to the console
                 console.log("Hooray, it worked!");
                 bootstrap_alert.success('video saved successfully');
            },

            // callback handler that will be called on error
            error: function(jqXHR, textStatus, errorThrown){
                // log the error to the console
                console.log("The following error occured: "+ textStatus, errorThrown);
                bootstrap_alert.error('There were some errors while saving the video. Please try in a while');
            },
        });

Answer 5

尝试将done替换为success，将fail替换为error？你在回调挂钩时使用它们作为选项。

jQuery：ajax运行两个处理程序 - 完成和失败

5 个答案: