upgrade method

  1. @override
Future<Schema> upgrade (Schema fromSchema, List<Migration> withMigrations, { bool temporary: false })


Future<Schema> upgrade(Schema fromSchema, List<Migration> withMigrations,
    {bool temporary = false}) async {
  var connection = await getDatabaseConnection();

  Schema schema = fromSchema;
  await connection.transaction((ctx) async {
    final transactionStore =
        PostgreSQLPersistentStore._transactionProxy(this, ctx);
    await _createVersionTableIfNecessary(ctx, temporary);

    withMigrations.sort((m1, m2) => m1.version.compareTo(m2.version));

    for (var migration in withMigrations) {
      migration.database =
          SchemaBuilder(transactionStore, schema, isTemporary: temporary);
      migration.database.store = transactionStore;

      var existingVersionRows = await ctx.query(
          "SELECT versionNumber, dateOfUpgrade FROM $versionTableName WHERE versionNumber >= @v:int4",
          substitutionValues: {"v": migration.version});
      if (existingVersionRows.isNotEmpty) {
        final date = existingVersionRows.first.last;
        throw MigrationException(
            "Trying to upgrade database to version ${migration.version}, but that migration has already been performed on $date.");

      logger.info("Applying migration version ${migration.version}...");
      await migration.upgrade();

      for (var cmd in migration.database.commands) {
        await ctx.execute(cmd);

          "Seeding data from migration version ${migration.version}...");
      await migration.seed();

      await ctx.execute(
          "INSERT INTO $versionTableName (versionNumber, dateOfUpgrade) VALUES (${migration.version}, '${DateTime.now().toUtc().toIso8601String()}')");

          .info("Applied schema version ${migration.version} successfully.");

      schema = migration.currentSchema;

  return schema;