instance method assume_migrated_upto_version

# File activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb, line 1397
      def assume_migrated_upto_version(version)
        version = version.to_i
        sm_table = quote_table_name(pool.schema_migration.table_name)

        migration_context = pool.migration_context
        migrated = migration_context.get_all_versions
        versions = migration_context.migrations.map(&:version)

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

        inserting = (versions - migrated).select { |v| v < version }
        if inserting.any?
          if (duplicate = inserting.detect { |v| inserting.count(v) > 1 })
            raise "Duplicate migration #{duplicate}. Please renumber your migrations to resolve the conflict."
          end
          execute insert_versions_sql(inserting)
        end
      end