instance method assume_migrated_upto_version

# File activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb, line 839
      def assume_migrated_upto_version(version, migrations_paths = ActiveRecord::Migrator.migrations_paths)
        migrations_paths = Array(migrations_paths)
        version = version.to_i
        sm_table = quote_table_name(ActiveRecord::Migrator.schema_migrations_table_name)

        migrated = select_values("SELECT version FROM #{sm_table}").map(&:to_i)
        versions = ActiveRecord::Migrator.migration_files(migrations_paths).map do |file|
          ActiveRecord::Migrator.parse_migration_filename(file).first.to_i
        end

        unless migrated.include?(version)
          execute "INSERT INTO #{sm_table} (version) VALUES ('#{version}')"
        end

        inserted = Set.new
        (versions - migrated).each do |v|
          if inserted.include?(v)
            raise "Duplicate migration #{v}. Please renumber your migrations to resolve the conflict."
          elsif v < version
            execute "INSERT INTO #{sm_table} (version) VALUES ('#{v}')"
            inserted << v
          end
        end
      end