Question

I have a standard controller which is set up to respond to HTML, JS and JSON requests:

def picture
  @picture = Picture.new params[:picture]

  respond_to do |format|
    if @picture.save
      format.html do
        logger.debug "In the HTML responder"
        redirect_to @picture
      end
      format.json { render json: @picture, status: :created, location: @picture }
      format.js { render :nothing => true }
    else
      # you get the idea
    end
  end
end

Now I’m trying to send a request to that controller with the $.ajax function (I can’t use :remote => true in this specific situation – I’m trying to make ajax file upload work).

$.ajax({
  url: $("form#new_picture").attr("action"),
  type: "POST",
  data: formdata,
  processData: false,
  contentType: false
});

The problem is that my request is being treated as a HTML request for some reason. How do I tell rails that I want a JS response?

By the way, I’m using jquery_ujs in my project so I have access to the methods it provides if necessary. I’m not really good enough at JS to tweak that to do what I need here.

Answer 1

This solution didn’t work for me (rails 3.1 + coffeescript). After searching quite a lot, I found the good way to do it and I wanted to share:

Just add “.js” to the end of the url. So simple… 😉