Just another quick problem I ran into with rails this afternoon – how to submit a form_for to a custom action. Luckily there’s quite a bit on how to do this in the documentation, my solution ended up as follows:
url_for(:controller => 'feedbacks', :action => 'leave_seller_feedback') do |f| %>
Just substitute your form_for tag with the one above and put in the relevant details and it should all work fine. Keep in mind that the submit tag doesn’t need to be changed, just the form_for tag.