force Create on scaffold Save

Hello there,

I working on a form, but I would like to save a news version after the
edit form, I changed my form_for to:

<%# form_for(@quote) do |f| %>
<% form_for :quote, :url => { :action => "create" } do |f| %>

but it's no working, a possible reason is that I have some nested
items on my form, but the save are working well with these items,

my first idea was overwrite the update method like

def update

one last thing, I considered using the acts_as_versioned but I could
not make it work with nested items.

does anybody have any advice here?

thank you very much!