How to Use MongoDB Transactions in Node.js

How to Use MongoDB Transactions in Node.js

MongoDB Node.js Driver 3.6.4, and Node.js 14.15.4. How to use MongoDB Transactions in Node.js - Want to see transaction in action? We're over halfway through the Quick Start with MongoDB and Node.js series. The Airbnb dataset that would require a multi-document transaction.

Developers who move from relational databases to MongoDB commonly ask, "Does MongoDB support ACID transactions? If so, how do you create a transaction?" The answer to the first question is, "Yes!"

Beginning in 4.0, MongoDB added support for  multi-document ACID transactions, and, beginning in 4.2, MongoDB added support for  distributed ACID transactions. If you're not familiar with what ACID transactions are or if you should be using them in MongoDB, check out my  earlier post on the subject.

This post uses MongoDB 4.4, MongoDB Node.js Driver 3.6.4, and Node.js 14.15.4.

Click  here to see a previous version of this post that uses MongoDB 4.0, MongoDB Node.js Driver 3.3.2, and Node.js 10.16.3.

We're over halfway through the Quick Start with MongoDB and Node.js series. We began by walking through how to  connect to MongoDB and perform each of the  CRUD (Create, Read, Update, and Delete) operations. Then we jumped into more advanced topics like the  aggregation framework.

The code we write today will use the same structure as the code we built in the first post in the series; so, if you have any questions about how to get started or how the code is structured,  head back to that first post.

Now, let's dive into that second question developers askā€”let's discover how to create a transaction!

Creating an Airbnb Reservation

As you may have experienced while working with MongoDB, most use cases do not require you to use multi-document transactions. When you model your data using our rule of thumb Data that is accessed together should be stored together, you'll find that you rarely need to use a multi-document transaction. In fact, I struggled a bit to think of a use case for the Airbnb dataset that would require a multi-document transaction.

After a bit of brainstorming, I came up with a somewhat plausible example. Let's say we want to allow users to create reservations in the sample_airbnb database.

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