retain query on item page

app/controllers/items_controller.rb

@@ -1,7 +1,8 @@
 class ItemsController < ApplicationController
+  before_filter :set_query
+  
   def index
     if params.has_key?(:q)
-      @query = params[:q]
       begin
         @results = Item.search(@query).alphabetize.paginate :page => params[:page]
       rescue
@@ -13,4 +14,10 @@ class ItemsController < ApplicationController
   def show
     @item = Item.find params[:id]
   end
+  
+  private
+  
+  def set_query
+    @query = params[:q]
+  end
 end

app/views/items/_item.html.haml

@@ -1,3 +1,3 @@
-= link_to item, :class => 'item' do
+= link_to item_path(item, :q => @query), :class => 'item' do
   = image_tag item.thumbnail_url, :alt => item.description, :title => item.description
   = item.name