NestJS · Senior · Question 50 of 75

How would you implement response caching that varies by user in Nest?

1Use the default CacheInterceptor, which is already per user
2Cache in the DTO
✓Correct answer: Extend CacheInterceptor and override trackBy() to include the user ID (or skip caching for authenticated requests)

Explanation

The default key is based on the URL. Caching personalized responses under a shared key leaks data.

Further reading

NestJS: Caching ↗

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