NestJS · Middle · Question 48 of 75

What does `@ResolveField()` do in a GraphQL resolver?

1Marks a field as deprecated
✓Correct answer: Resolves a field of a type separately, e.g. loading author for each Post, often with DataLoader to avoid N+1
3Validates GraphQL input

Explanation

Without batching, resolving author for 100 posts triggers 100 queries.

Further reading

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