app/models/relation_member.rb

   1 class RelationMember < ActiveRecord::Base
   2   set_table_name 'current_relation_members'
   3   set_primary_keys :relation_id, :sequence_id
   4
   5   belongs_to :relation
   6   belongs_to :member, :polymorphic => true
   7
   8   after_find :set_class_from_type
   9   after_initialize :set_class_from_type
  10   before_save :set_type_from_class
  11
  12   def member_type=(type)
  13     self[:member_type] = type
  14     self[:member_class] = type.capitalize
  15   end
  16
  17 private
  18
  19   def set_class_from_type
  20     self[:member_class] = self.member_type.classify unless self.member_type.nil?
  21   end
  22
  23   def set_type_from_class
  24     self.member_type = self[:member_class].classify
  25   end
  26 end