How the Repository Pattern Made My NestJS Projects Cleaner and Easier.

A few days ago, I was working on a NestJS project, and things started to get messy. My services were getting too big with lots of database queries, and testing was becoming a headache.

I knew I needed a better way to Organize my code, so I decided to try something new—the Repository Pattern.

At first, I wasn’t sure if it would really help. But once I started using it, I could immediately see the difference.

Here’s what happened:

1. My code became cleaner. With the repository handling all the database stuff, my services were focused only on business logic.
2. It was easier to test. Since the database logic was separated, I could easily mock the repository and test my services.
3. Scaling the project became much smoother. I wasn’t repeating myself anymore, and making changes was faster and less risky.

The best part? My project was now much easier to maintain and expand. What felt like a mess before was now a well-organized system.

If you’re building a NestJS app and your code is starting to feel messy, give the Repository Pattern a try. It’s a small change that can make a big difference.