socialforge/app/controllers/homework_attach_controller.rb

class HomeworkAttachController < ApplicationController
  #显示作业信息
  def show
    @homework = HomeworkAttach.find(params[:id])
    # 打分统计
    stars_reates = @homework.
        rates(:quality)
    stars_reates_count = stars_reates.count == 0 ? 1 : stars_reates.count
    stars_status = stars_reates.select("stars, count(*) as scount").
        group("stars")
    @stars_status_map = Hash.new(0.0)
    stars_status.each do |star_status|
      percent = (star_status.scount * 1.0/ stars_reates_count) * 100.to_f
      percent_m = format("%.2f", percent)
      @stars_status_map["star#{star_status.stars.to_i}".to_sym] =
          percent_m.to_s + "%"
    end
    @jours = @homework.journals_for_messages.order("created_on DESC")
    @limit =  10
    @feedback_count = @jours.count
    @feedback_pages = Paginator.new @feedback_count, @limit, params['page']
    @offset ||= @feedback_pages.offset
    @jour = @jours[@offset, @limit]
  end

  def destroy
    @journal_destroyed = JournalsForMessage.delete_message(params[:object_id])
    respond_to do |format|
      format.js
    end
  end

  def addjours
    @homework = HomeworkAttach.find(params[:jour_id])
    @homework.addjours User.current.id, params[:new_form][:user_message],0
    @jours = @homework.journals_for_messages.order("created_on DESC")
    @limit =  10
    @feedback_count = @jours.count
    @feedback_pages = Paginator.new @feedback_count, @limit, params['page']
    @offset ||= @feedback_pages.offset
    @jour = @jours[@offset, @limit]
    respond_to do |format|
      format.js
    end
  end
end