NestJS · Middle · Question 24 of 75

Why might you write a custom pipe instead of using `ValidationPipe`?

✓Correct answer: For specific transformations, e.g. turning an ID into a loaded entity, or validating with Zod schemas
2ValidationPipe doesn't work with POST requests
3Custom pipes run before middleware

Explanation

A pipe implements transform(value, metadata). Zod-based pipes are popular when schemas are shared with the front end.

Further reading

NestJS: Pipes ↗

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