app/models/relation_member.rb

   1 class RelationMember < ActiveRecord::Base
   2   set_table_name 'current_relation_members'
   3
   4   belongs_to :member, :polymorphic => true, :foreign_type => :member_class
   5   belongs_to :relation, :foreign_key => :id
   6
   7   def after_find
   8     self[:member_class] = self.member_type.capitalize
   9   end
  10
  11   def after_initialize
  12     self[:member_class] = self.member_type.capitalize
  13   end
  14
  15   def before_save
  16     self.member_type = self[:member_class].downcase
  17   end
  18
  19   def member_type=(type)
  20     self[:member_type] = type
  21     self[:member_class] = type.capitalize
  22   end
  23 end