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Database

TypeORM

async function runWithTransaction(connection: Connection) {

    const user = new User();
    user.firstName = "Timber";
    user.lastName = "Saw";
    user.age = 26;

    const queryRunner = connection.createQueryRunner();
    await queryRunner.connect();
    await queryRunner.startTransaction();
    await queryRunner.manager.save(user);
    await queryRunner.commitTransaction();

    // less explicit transaction

    await getManager().transaction(async transactionEntityManager => {
       await transactionEntityManager.save(user1);
       await transactionEntityManager.save(user2);
       // throw new Error("some error");  // Check that no user is added if we have exception.
    });

}