class CourseMessage < ActiveRecord::Base # status说明: status在课程不同的类型,区分不同的功能 status = 9 作品的提交记录 # ApplyResource status: # 0: 发送申请 1:回复允许申请 2:拒绝申请消息 # HomeworkCommon:status: # nil:发布了作业; 1:作业截止时间到了提醒!;2:开启匿评; 3:关闭匿评; 4:匿评开始失败; 5:申请引用作业, 6:申请结果 # apply_user_id: 申请者的用户id # StudentWorksScoresAppeal: status: # 1: 申诉中, 2:申诉撤销, 3:申诉成功, 4:申诉被拒绝 attr_accessible :course_id, :course_message_id, :course_message_type, :user_id, :viewed, :content, :status, :apply_user_id, :apply_result # 多态 虚拟关联 belongs_to :course_message ,:polymorphic => true belongs_to :course belongs_to :user has_many :message_alls, :class_name => 'MessageAll',:as =>:message, :dependent => :destroy validates :user_id,presence: true validates :course_id,presence: true validates :course_message_id,presence: true validates :course_message_type, presence: true #validates_length_of :content, :maximum => 100 # after_create :add_user_message def add_user_message #unless self.course_message_type == 'JoinCourseRequest' if MessageAll.where("message_type = '#{self.class.to_s}' and message_id = '#{self.id}'").first.nil? && self.status != 9 self.message_alls << MessageAll.new(:user_id => self.user_id) end #end end end