bigdir/app/controllers/memos_controller.rb

class MemosController < ApplicationController
  layout 'base_memos'
  def new
    @memo = Memo.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @memo }
    end
  end
  
  def show
    @memo = Memo.find_by_id(params[:id])
    @forum = Forum.find(params[:forum_id])
    @replies = @memo.replies
    @mome_new = Memo.new
    
    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @memo }
    end
  end
  
  def create
    @memo = Memo.new(params[:memo])
    @memo.forum_id = params[:forum_id]
    @memo.author_id = User.current.id
    @forum = Forum.find(params[:forum_id])

    if @memo.parent_id
      @parent_memo = Memo.find_by_id(@memo.parent_id)
      @parent_memo.replies_count += 1
    end

    respond_to do |format|
      if @memo.save
        @forum.memo_count += 1
        @forum.last_memo_id = @memo.id
        @back_memo_id = (@memo.parent_id.nil? ? @memo.id : @memo.parent_id)
        if @parent_memo
          @parent_memo.last_reply_id = @memo.id
          @parent_memo.save
        else
          @forum.topic_count += 1
        end
        @forum.save

        format.html { redirect_to forum_memo_path(@memo.forum_id, @back_memo_id), notice: 'Memo was successfully created.' }
        format.json { render json: @memo, status: :created, location: @memo }
      else
        format.html { render action: "new" }
        format.json { render json: @memo.errors, status: :unprocessable_entity }
      end
    end
  end
  
  def destroy
    @memo = Memo.find(params[:id])
    @memo.destroy

    respond_to do |format|
      format.html { redirect_to memos_url }
      format.json { head :no_content }
    end
  end
end