update_migration_info (DataMapper::Migration)

    # File lib/dm-migrations/migration.rb, line 148
        def update_migration_info(direction)
          save, @verbose = @verbose, false

          create_migration_info_table_if_needed

          if direction.to_sym == :up
            execute("INSERT INTO #{migration_info_table} (#{migration_name_column}) VALUES (#{quoted_name})")
          elsif direction.to_sym == :down
            execute("DELETE FROM #{migration_info_table} WHERE #{migration_name_column} = #{quoted_name}")
          end
          @verbose = save
        end