NestJS · Middle · Question 26 of 75

How do you write a global filter that formats all errors as RFC 9457 problem details?

✓Correct answer: A class with @Catch() (no arguments catches everything) implementing catch(exception, host), registered with APP_FILTER
2A pipe on every route
3Override HttpException.prototype.toString

Explanation

Map HttpExceptions to their status, unknown errors to 500 with a generic message, and log the real error with a request ID.

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.