sillyforum/app/controllers/forum_threads_controller.rb

class ForumThreadsController < ApplicationController
   def index
end
  
   def show
    @category = Category.find(params[:category_id])

    @forum_topic = @category.forum_topics.find(params[:forum_topic_id])

    @forum_thread = @forum_topic.forum_threads.find(params[:id])
    @forum_thread.replies = Reply.all

end
end