# container_type:
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# Avatar-首次上传头像  Attendance-签到  Memo/Discusses-发布帖子或评论 Star-实训评分获得的随机奖励 CheckTaAnswer-查看他人答案
# Feedback-反馈问题 Authentication-实名认证 Professional-职业认证
class Grade < ActiveRecord::Base
  attr_accessible :container_id, :container_type, :score, :user_id

  belongs_to :user

  has_many :tidings, :as => :container, :dependent => :destroy
  after_create :send_tiding
  def send_tiding
    self.tidings << Tiding.new(:user_id => self.user_id, :trigger_user_id => 0, :parent_container_id => self.container_id,
                               :parent_container_type => self.container_type, :viewed => 0, :tiding_type => "System")
  end
end