Method begin

src/transaction.js:158–169

()

  }

  async begin() {
    const queryInterface = this.sequelize.getQueryInterface();

    if ( this.sequelize.dialect.supports.settingIsolationLevelDuringTransaction ) {
      await queryInterface.startTransaction(this, this.options);
      return queryInterface.setIsolationLevel(this, this.options.isolationLevel, this.options);
    }

    await queryInterface.setIsolationLevel(this, this.options.isolationLevel, this.options);

    return queryInterface.startTransaction(this, this.options);
  }

  cleanup() {
    // Don't release the connection if there's a parent transaction or