Rails - May 2006 - Passing params between actions?

I am wondering what are the rules for the availability of params in
controller actions?  If I redirect, are the params still available?  How
about when I render a different action?  It doesn''t seem so...  What
are the
best ways to pass them?

I''m trying to use an ajax scaffold component with 2 actions which load
different data for the component.  I have an ajax scaffold component
"listings" that I want to use on one page for "new listings"
and on a
different page for "listings search results".  I''m also
trying to make the
"search" action save an object called "saved_search" with
the search
parameters so the searches can be re-run later.

So where should code specific to the search action go?  I dont'' want to
put
it in component_update as then both actions would use it.  But if I put it
in the search action, I''m not sure how to then pass the params on to
the
component_action?

  if @params[:saved_search_id]
      @saved_search = SavedSearch.find(params[:saved_search_id])
    else
      @saved_search = SavedSearch.new
      saved_search.update_attributes(params[:saved_search])
  end

Thanks to Brian Hughes and Liquid for great answers on my doc question!
Thanks,

Eric
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