Transactions

Ensure multiple operations succeed or fail together.

Overview

Ensure multiple operations succeed or fail together.

Code Example

const session = client.startSession();
session.startTransaction();
try {
  await users.updateOne({}, {$inc: {bal: -100}}, {session});
  await orders.insertOne({total: 100}, {session});
  await session.commitTransaction();
} catch (e) { await session.abortTransaction(); }

Web Development Context

In modern web development, understanding Transactions is crucial. By applying this concept correctly, you can build scalable, efficient, and robust applications. Remember that MongoDB is a flexible NoSQL database, meaning that while you have the freedom to design your data as you see fit, following best practices ensures performance and maintainability.

Common Mistakes

• Not using the correct data type (e.g. string instead of ObjectId).
• Forgetting to handle asynchronous operations properly in Node.js.
• Exposing database credentials in frontend code.

Next Steps

To solidify your understanding, review the related references and try out the practice challenges.