NestJS · Senior · Question 5 of 75

What are durable providers for?

1Providers that are stored in Redis
✓Correct answer: Multi-tenant apps: request-scoped subtrees are cached per tenant (via a ContextIdStrategy) instead of rebuilt for every request
3Providers that survive process restarts

Explanation

You map each request to a tenant context ID, so tenant-specific providers (like a tenant DB connection) are reused across that tenant's requests.

Further reading

NestJS: Injection scopes ↗

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