Which of the following is the correct GraphQL schema snippet to represent a one-to-many relationship between Author and Book?

easy📝 Syntax Q12 of 15

GraphQL - Type Relationships

Which of the following is the correct GraphQL schema snippet to represent a one-to-many relationship between Author and Book?

Atype Author { id: ID! name: String! books: [Book!]! } type Book { id: ID! title: String! authorId: ID! }

Btype Author { id: ID! name: String! book: Book } type Book { id: ID! title: String! author: Author }

Ctype Author { id: ID! name: String! books: Book } type Book { id: ID! title: String! authorId: ID! }

Dtype Author { id: ID! name: String! books: Book! } type Book { id: ID! title: String! authorId: ID! }

Step-by-Step Solution

Solution:

Step 1: Identify list type for many children
In GraphQL, a one-to-many uses a list type like [Book!]! for multiple books.
Step 2: Check each option's books field
type Author { id: ID! name: String! books: [Book!]! } type Book { id: ID! title: String! authorId: ID! } uses books: [Book!]! correctly; others use single Book or wrong types.
Final Answer:
type Author { id: ID! name: String! books: [Book!]! } type Book { id: ID! title: String! authorId: ID! } -> Option A
Quick Check:
List type for many children = [Type!]! [OK]

Quick Trick: Use square brackets [] for lists in GraphQL schema [OK]

Common Mistakes:

Master "Type Relationships" in GraphQL

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free

More GraphQL Quizzes