NestJS · Middle · Question 63 of 75

What's a sign that a Nest controller is doing too much?

1It has more than one route
2It uses DTOs
✓Correct answer: It contains business rules, database queries and orchestration instead of delegating to services

Explanation

Thin controllers are easier to test, and the same logic can be reused by queues, schedulers or GraphQL resolvers.

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.