Many-to-many relationships in GraphQL - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a many-to-many relationship between Author and Book types using GraphQL schema syntax.

GraphQL

type Author {
  id: ID!
  name: String!
  books: [[1]!]!
}

Drag options to blanks, or click blank then click option'

AString

BBook

CAuthor

DID

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong type like Author or scalar types instead of Book.

Not using a list to represent multiple books.

The books field in Author should be a list of Book types to represent the many-to-many relationship.

2fill in blank

medium

Complete the code to define the reciprocal many-to-many relationship from Book back to Author.

GraphQL

type Book {
  id: ID!
  title: String!
  authors: [[1]!]!
}

Drag options to blanks, or click blank then click option'

ABook

BString

CAuthor

DID

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong type like Book or scalar types instead of Author.

Not using a list to represent multiple authors.

The authors field in Book should be a list of Author types to link books back to their authors.

3fill in blank

hard

Fix the error in this GraphQL schema snippet that tries to define a many-to-many relationship but uses incorrect syntax.

GraphQL

type Author {
  id: ID!
  name: String!
  books: [1]
}

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A[Book]!

B[Book]

CBook!

DBook

Attempts:

3 left

💡 Hint

Common Mistakes

Using just Book without list brackets.

Using [Book] without the non-null marker on the list.

The field books should be a non-null list of Book types, so [Book]! is correct.

4fill in blank

hard

Fill both blanks to complete the GraphQL schema for a join type AuthorBook that connects Author and Book by their IDs.

GraphQL

type AuthorBook {
  authorId: [1]!
  bookId: [2]!
}

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AID

BString

CInt

DBoolean

Attempts:

3 left

💡 Hint

Common Mistakes

Using String or Int instead of ID.

Using Boolean which is not suitable for IDs.

Both authorId and bookId should be of type ID to uniquely identify the related records.

5fill in blank

hard

Fill all three blanks to complete a GraphQL query that fetches authors with their books, filtering books by title containing 'GraphQL'.

GraphQL

query {
  authors {
    name
    books(filter: { title: { [1]: "GraphQL" } }) {
      [2]
      [3]
    }
  }
}

Drag options to blanks, or click blank then click option'

Acontains

Bid

Ctitle

Dequals

Attempts:

3 left

💡 Hint

Common Mistakes

Using equals instead of contains for filtering.

Not selecting both id and title fields.

The filter uses contains to find books with titles containing 'GraphQL'. The query selects id and title fields of those books.