MongoDB Transactions Examples

Implement a Transaction to Transfer Funds

Write a MongoDB transaction that debits one user's account and credits another's atomically.

Expected output: Both accounts are updated together or not at all.

Hint: Use sessions and update operations within a transaction.

Handle Transaction Errors Gracefully

Modify your transaction code to retry on transient errors and abort on fatal errors.

Expected output: Transaction retries on transient errors and aborts on others.

Hint: Use try-catch blocks and check error labels.

Transactions ensure multiple operations across documents and collections execute atomically, maintaining data consistency.

You start a transaction by creating a client session and calling startTransaction() on that session.

Yes, MongoDB transactions can include operations across multiple collections and documents.