relation

# File activerecord/lib/active_record/base.rb, line 449
      def relation #:nodoc:
        @relation ||= Relation.new(self, arel_table)

        if finder_needs_type_condition?
          @relation.where(type_condition).create_with(inheritance_column.to_sym => sti_name)
        else
          @relation
        end
      end