javascript - Cannot remove files from file list using JQuery-File-Upload

Question

I have an issue using the JQuery-File-Upload plugin. I am using the plugin directly and not through the author's provided html example pages. Basically I have a form with some inputs one of which is a file input. The first upload works fine but when I attempt a second upload both files are sent (the first one for the second time) when it should only be the second one.

Example:

• File 1 is selected.
• File 1 is uploaded.
• Success.
• Using jquery I reset the form with $(FORM_SELECTOR).trigger('reset')
• File 2 is selected.
• File 1 and file 2 are BOTH uploaded.
• Problem.

Now I have two copies of file 1. This is not what I want.

Obviously there isn't much point of using an ajax form upload if it only works once so I assume that there is something I am missing.

Is there a way to reset the file queue?

When examining the data.files object I can see that the files are there after the form is reset. What can I do to sync the plugin with the input or clear out the data.files. If I manually clear out the data.files array (via pop or data.files = []) attempting a second upload does not work.

I init the upload form like this:

    $('#file-upload-form').fileupload({
    url: 'uploads/upload',
    type: 'POST',
    dataType: 'json',
    multipart: true,
    dropZone: null,
    formAcceptCharset: 'utf-8',
    autoUpload: true,
    add: function (e, data) {
        fileUploadData = data;
        $("#upload-file-btn").click(function () {
            data.submit()
                .success(function (e, status, data) {
                    console.log("success response from post", status, data);
                    var i = '<input id="file-select-input" name="files[]" multiple/>';
                    $('#file-select-input').replaceWith(i);
                })
        });
    }
});

Answer 1

I have a custom .add event handler, in which I have called .off("click") on my button:

                add: function (e, data) {

                    $('#btnstartupload').off("click");
                    data.context = $('#btnstartupload')
                        .click(function () {
                            data.submit();
                            $(".fileinput-button").hide();
                        });
}