Error - $(that).fileupload("option", "done").call is not a function

[norman ancajas]

I'm using this plugin for a Rails app, and I followed this tutorial and this example.

However I encounter the ff error in the console

$(that).fileupload("option", "done").call is not a function

from this snippet here from the main.js file:

// Load existing files:
    $('#fileupload').each(function () {
        var that = this;
        $.getJSON(this.action, function (result) {
            if (result && result.length) {
                $(that).fileupload('option', 'done')
                  .call(that, null, { result:result });
            }
        });
    });
 

Regardless of the error message above, the files I uploaded were saved in the database. However I encountered unexpected behaviors in the file upload form.
1. The existing files were not rendered, even though JSON data was retrieved.
2. The selected files for upload were not rendered also.
3. After file selection, the file/s are automatically saved (even if I didn't set autoUpload = true). I understand that this is not default behavior.

[norman ancajas]

I've found a solution for this error.

Apparently, I missed including the jquery.fileupload-ui.js file.