class MessageAll < ActiveRecord::Base
  attr_accessible :message_id, :message_type, :user_id
  belongs_to :user
  # 虚拟关联---项目消息表/课程消息表/用户留言消息表/贴吧消息表
  belongs_to :forge_message, foreign_key: 'message_id', conditions: "message_alls.message_type = 'ForgeMessage'"
  belongs_to :course_message, foreign_key: 'message_id', conditions: "message_alls.message_type = 'CourseMessage'"
  belongs_to :applied_message, foreign_key: 'message_id', conditions: "message_alls.message_type = 'AppliedMessage'"
  belongs_to :at_message, foreign_key: 'message_id', conditions: "message_alls.message_type = 'AtMessage'"
  belongs_to :memo_message, foreign_key: 'message_id', conditions: "message_alls.message_type = 'MemoMessage'"
  belongs_to :org_message, foreign_key: 'message_id', conditions: "message_alls.message_type = 'OrgMessage'"
  belongs_to :system_message, foreign_key: 'message_id', conditions: "message_alls.message_type = 'SystemMessage'"
  belongs_to :user_feedback_message, foreign_key: 'message_id', conditions: "message_alls.message_type = 'UserFeedbackMessage'"
  belongs_to :message ,:polymorphic => true

end