data.context在jQuery File Uploader的fileuploadprogress事件中为空

Question

我遇到了jQuery File Uploader(blueimp)的问题:

我的实现是完全自定义的.我使用图像预览和验证.

我的问题是,即使我在我的fileuploadadd事件中定义data.context ,它在fileuploadprogress被触发时也是空的.

$('fileinput-element').fileupload({
    url: '/__module/uploadModule/receive',
    type: 'post',
    acceptFileTypes: acceptedFileRegEx,
    dataType: 'json',
    'dropZone': $(dropZone),
    paramName: 'files',
    autoUpload: false,
}).on('fileuploadadd', function (e, data) {

    $.each(data.files, function (index, file) {

        // NOTE: This function call returns a clone of an element that i use as template for upload list items. Works fine.
        var component=uploadModule.getDynamicComponent('listItemContainer');

        // Filling the template (code omitted due to better readabilty)

        // Appending the component to my #uploadList and assigning that to data.context
        data.context = component.appendTo('#uploadList');

    });

    // For manual submittion later on, i fill an array with the data objects from each event call
    dataList.push(data);

}).on('fileuploadprocessalways', function(e,data){

    var index = data.index,
        file = data.files[index],
        node = $(data.context.children()[index]);

    // Further code ommitted due to readability. Here i apply file.preview and (potential) file.error to my list item that is now stored in the variable node. This works fine. My list renders perfectly well.

}).on('fileuploadprogress', function(e, data){

    // PROBLEM: data.context is EMPTY ! Why???
    console.log(data.context);

});

这就是我点击开始上传按钮后提交所有内容的方式:

$(dataList).each(function(){
    this.submit();
});

// This works well - the uploads are being submitted and sent to the server.

我已经做了大量的解决方案搜索,测试,试错,调试1.5天了.我无法绕过这个.

我究竟做错了什么？

请注意:如果我data.submit()在add事件回调中执行了正确的操作,那么data.context在progress事件触发时会正确填充,但我不再需要手动启动整个上传队列.

Answer 1

这个问题的解决方案非常令人惊讶:

我对fileupload组件和插件的加载顺序是:

jquery
jquery-ui (for the widget
load-image.js
iframe-transport.js
fileupload.js
fileupload-process.js
fileupload-image.js
fileupload-validate.js
fileupload-ui.js

最后一个(fileupload-ui.js)是陷阱.我认为我必须将它包含在我的上传器的实现中,但我没有.似乎我误解了它的用途.

我删除它的那一刻,我的脚本/实现开始工作,data.context现在正确填充.