Описание тега remotipart

The Remotipart gem enables AJAX file-upload capability to remote forms in Rails 3 apps by extending the native jquery-ujs functionality.

The Remotipart gem does two things:

1. When non-blank file input fields are detected in a form, remotipart.js hijacks the remote form submission, and instead submits the form using via form.js’s.ajaxSubmit() function, which uses iFrame technique described in the last article.
2. Remotipart provides the remotipart_response block method in our response js.erb views. This method first checks to see if the form was hijacked by Remotipart and was thus submitted in an iFrame, and if so, it returns our generated JS inside a textarea element, so that it automatically gets executed in our parent window.