NestJS · Senior · Question 51 of 75

How can you implement API versioning without duplicating whole controllers?

1Change response formats without versions
2Copy the whole app for each version
✓Correct answer: Version only changed routes (@Version), share services, and map to version-specific DTOs at the edges

Explanation

VERSION_NEUTRAL routes serve all versions; only routes whose contract changed need a new version.

Further reading

NestJS: Versioning ↗

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