class Reference < ActiveRecord::Base belongs_to :person belongs_to :job has_many :agents_posts_authors, :through => :person class << self; attr_accessor :make_comments; end self.make_comments = false before_destroy :make_comments def make_comments if self.class.make_comments person.update comments: "Reference destroyed" end end end class BadReference < ActiveRecord::Base self.table_name = 'references' default_scope { where(:favourite => false) } end