sillyforum/app/controllers/forum_threads_controller.rb

class ForumThreadsController < ApplicationController
   def index
end
  
   def show
   id = params.extract_value(:id)
  @category = Category.find(params[:category_id])
  @forum_topic = @category.forum_topics.find(params[:forum_topic_id])
  @forum_thread = @category.forum_topics.forum_threads.find(params[:forum_thread_id])
end

  end
   end

end