graphql-n-plus-one-remediation

What N+1 looks like in a resolver tree

One field returns a list of N rows. The executor then invokes the resolver for each inner field once per row, so if Query.topReviews returns ten reviews the executor resolves Review.product ten times, and a data-source call in that child field becomes ten calls (apollographql.com). So 1 outer query plus N inner queries equals N+1.

// Parent resolver fetches N posts
posts: () => db.posts.findMany({ limit: 50 })