Hello, I am trying to implement a sort on the returned results of a search with rails.

Filter by: 'recent' %> | 'lowest_price' %> | 'highest_price' %>

here are my links. I would like to add a filter to the end of my search query. So for example, I submit a search and I get back results and in my url I have

http://localhost:3000/junks?search=handbag&condition=&category=&main_submit=Go!

I would then like the user to be able to click one of the above links and have the page come back with a new query (i have this set up in the controller like such)

con_id = params[:condition]
   if params[:category].nil? || params[:category].empty?
     cat_id = params[:category]
     results = Junk.search params[:search], :with => { :category_id => cat_id, :condition_id => con_id  }

         case params[:filter]
         when "lowest_price"
           @junks = results.lowest_price.paginate :page => params[:page], :per_page => 12
         when "highest_price"
           @junks = results.highest_price.paginate :page => params[:page], :per_page => 12
         else
           @junks = results.paginate :page => params[:page], :per_page => 12
         end
   else

I would like the user to be able to click on of the above links and append a filter param to the end of the search query so that my controller can pick it up and call the correct database queries as seen in the case statement above.

I'm guessing the url will look like this

http://localhost:3000/junks?search=handbag&condition=&category=&main_submit=Go!&filter="lowest_price"

How can I do this? Is there a better way?