socialforge/app/models/homework_common.rb

#老师布置的作业表
#homework_type: 0:普通作业;1:匿评作业;2:编程作业
class HomeworkCommon < ActiveRecord::Base
  # attr_accessible :name, :user_id, :description, :publish_time, :end_time, :homework_type, :late_penalty, :course_id
  include Redmine::SafeAttributes
  include ApplicationHelper

  belongs_to :course
  belongs_to :user
  has_one :homework_detail_manual, :dependent => :destroy
  has_one :homework_detail_programing, :dependent => :destroy
  has_many :homework_tests, :dependent => :destroy
  has_many :student_works, :dependent => :destroy, :conditions => "is_test=0"
  has_many :student_works_evaluation_distributions, :through => :student_works #一个作业的分配的匿评列表
  has_many :acts, :class_name => 'Activity', :as => :act, :dependent => :destroy #用户活动
  # 课程动态
  has_many :course_acts, :class_name => 'CourseActivity',:as =>:course_act ,:dependent => :destroy
  # 课程消息
  has_many :course_messages, :class_name =>'CourseMessage', :as => :course_message, :dependent => :destroy
  acts_as_attachable
  acts_as_event :title => Proc.new {|o| "#{l(:label_course_homework)} ##{o.id}: #{o.name}" },
                :description => :description,
                :author => :author,
                :url => Proc.new {|o| {:controller => 'student_work', :action => 'index', :homework => o.id}}
  after_create :act_as_activity, :send_mail, :act_as_course_activity, :act_as_course_message
  after_destroy :delete_kindeditor_assets

  def act_as_activity
    self.acts << Activity.new(:user_id => self.user_id)
  end

  #课程动态公共表记录
  def act_as_course_activity
    if self.course
      self.course_acts << CourseActivity.new(:user_id => self.user_id,:course_id => self.course_id)
    end
  end

  #课程作业消息记录
  def act_as_course_message
    if self.course
      self.course.members.each do |m|
        # if m.user_id != self.user_id
          self.course_messages << CourseMessage.new(:user_id => m.user_id, :course_id => self.course_id, :viewed => false)
        # end
      end
    end
  end

  #删除对应的图片
  def delete_kindeditor_assets
    delete_kindeditor_assets_from_disk self.id,OwnerTypeHelper::HOMEWORKCOMMON
  end

  def send_mail
    Mailer.run.homework_added(self)
  end

  def is_program_homework?
    self.homework_type == 2 && self.homework_detail_programing
  end

  delegate :language_name, :language, :to => :homework_detail_programing

end