gistfile1.rb

      def by_direction(condition, time, options = {}, &block)
        field = 'end'
        ensure_valid_options(options)
        scoping = { :conditions => ["#{self.table_name}.#{field} #{condition} ?", time.utc] }.merge(options)
        with_scope(:find => scoping) do
          scoped_by(block) do
            find(:all)
          end
        end
      end