NestJS · Middle · Question 34 of 75

What's a clean way to keep Prisma or TypeORM details out of business logic?

1Use the ORM directly in controllers
2Duplicate queries in each service
✓Correct answer: Put data access behind repository providers with an interface token, and keep services working with domain types

Explanation

This adds a layer, so it pays off in larger domains or when you need to swap storage or test without a database.

Further reading

Test yourself

Take the NestJS · Middle quiz: questions and options are shuffled, and you get a review of your mistakes at the end.