add_limit!

# File activerecord/lib/active_record/base.rb, line 1420
        def add_limit!(sql, options, scope = :auto)
          scope = scope(:find) if :auto == scope

          if scope
            options[:limit] ||= scope[:limit]
            options[:offset] ||= scope[:offset]
          end

          connection.add_limit_offset!(sql, options)
        end