socialforge/app/controllers/poll_controller.rb

class PollController < ApplicationController
  before_filter :find_poll_and_course, :only => [:edit,:update,:destroy,:show,:statistics_result]
  before_filter :find_container, :only => [:new,:create, :index]
  before_filter :is_member_of_course, :only => [:index,:show]
  before_filter :is_course_teacher, :only => [:new,:create,:edit,:update,:destroy]

  def index
    if @course
      @is_teacher = User.current.allowed_to?(:as_teacher,@course)
      polls = Poll.where("polls_type = 'Course' and polls_group_id = #{@course.id}")
      @polls = paginateHelper polls,10 #分页
      respond_to do |format|
        format.html{render :layout => 'base_courses'}
      end
    elsif @project
      #项目的问卷调查相关代码
    end
  end

  def show
    @poll = Poll.find params[:id]
    @poll_questions = @poll.poll_questions

    respond_to do |format|
      format.html {render :layout => 'base_courses'}
    end
  end

  def new
    if @course
      option = {
          :polls_name => l(:label_poll_new),
          :polls_type => @course.class.to_s,
          :polls_group_id => @course.id,
          :polls_status => 1,
          :user_id => User.current.id,
          :published_at => Time.now,
          :closed_at => Time.now,
          :polls_description => ""
      }
      @poll = Poll.create option
      if @poll
        respond_to do |format|
          format.html{render :layout => 'base_courses'}
        end
      end
    elsif @project
      #项目的问卷调查相关代码
    end
  end

  def create

  end

  def edit

  end

  def update
    @poll.polls_name = params[:polls_name]
    if @poll.save
      respond_to do |format|
        format.html { redirect_to poll_index_url(:polls_type => @course.class.to_s, :polls_group_id => @course.id) }
      end
    else
    end
  end

  def destroy
    if @poll && @poll.destroy
      respond_to do |format|
        format.js
      end
    end
  end

  def statistics_result
    respond_to do |format|
      format.html{render :layout => 'base_courses'}
    end
  end

  #添加单选题
  def add_mc

  end

  private
  def find_poll_and_course
    @poll = Poll.find params[:id]
    @course = Course.find @poll.polls_group_id
  rescue Exception => e
    render_404
  end

  def find_container
    if params[:polls_type] && params[:polls_group_id]
      case params[:polls_type]
        when "Course"
          @course = Course.find_by_id params[:polls_group_id]
        when "Project"
          @project = Project.find_by_id params[:polls_group_id]
      end
    else
      render_404
    end
  end

  def is_member_of_course
    render_403 unless(@course && User.current.member_of_course?(@course))
  end

  def is_course_teacher
    render_403 unless(@course && User.current.allowed_to?(:as_teacher,@course))
  end
end