serializable_add_includes

# File activerecord/lib/active_record/serialization.rb, line 31
      def serializable_add_includes(options = {})
        return unless include_associations = options.delete(:include)

        base_only_or_except = { :except => options[:except],
                                :only => options[:only] }

        include_has_options = include_associations.is_a?(Hash)
        associations = include_has_options ? include_associations.keys : Array.wrap(include_associations)

        for association in associations
          records = case self.class.reflect_on_association(association).macro
          when :has_many, :has_and_belongs_to_many
            send(association).to_a
          when :has_one, :belongs_to
            send(association)
          end

          unless records.nil?
            association_options = include_has_options ? include_associations[association] : base_only_or_except
            opts = options.merge(association_options)
            yield(association, records, opts)
          end
        end

        options[:include] = include_associations
      end