Fix raw cache issue.

Author: huacnlee

app/controllers/topics_controller.rb

@@ -82,7 +82,7 @@ def show
     drop_breadcrumb("#{@node.try(:name)}", node_topics_path(@node.try(:id)))
     drop_breadcrumb t("topics.read_topic")
 
-    fresh_when(:etag => [@topic,@has_followed,@has_favorited,@replies,@node])
+    fresh_when(:etag => [@topic,@has_followed,@has_favorited,@replies,@node,@show_raw])
   end
 
   def new

app/views/topics/show.html.erb

@@ -69,7 +69,7 @@
         共收到 <b><%= @topic.replies_count %></b> 条回复
       </div>
       <div class="items">
-        <%= cache([@topic,params[:page]]) do %>
+        <%= cache([@topic,params[:page],"raw:#{@show_raw}"]) do %>
           <%= render :partial => "replies/reply", :collection => @replies %>
         <% end %>
       </div>