Union types in GraphQL - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a union type named SearchResult.

GraphQL

union SearchResult = [1] | Book | Author

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

AArticle

BSong

CMovie

DReview

Attempts:

3 left

💡 Hint

Common Mistakes

Using a type not defined in the schema.

Forgetting to separate types with |.

The union type SearchResult includes Movie, Book, and Author types.

2fill in blank

medium

Complete the query to search for a SearchResult by ID.

GraphQL

query { search(id: 1) { ... on [1] { title } ... on Author { name } } }

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

AMovie

BDirector

CPublisher

DBook

Attempts:

3 left

💡 Hint

Common Mistakes

Using a type not in the union.

Missing the inline fragment syntax.

The query uses an inline fragment on Book to get the title field.

3fill in blank

hard

Fix the error in the union type definition by completing the code.

GraphQL

union SearchResult = Book | [1] | Author

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

AMovie

BString

CInt

DBoolean

Attempts:

3 left

💡 Hint

Common Mistakes

Including scalar types in union definitions.

Using types not defined as objects.

Union types can only include object types, not scalar types like String or Int.

4fill in blank

hard

Fill both blanks to complete the query using inline fragments for SearchResult.

GraphQL

query { search(id: 2) { ... on [1] { title } ... on [2] { name } } }

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

ABook

BAuthor

CMovie

DPublisher

Attempts:

3 left

💡 Hint

Common Mistakes

Using types not in the union.

Forgetting to use inline fragments.

The query uses inline fragments on Book and Author to get their respective fields.

5fill in blank

hard

Fill all three blanks to define a union and query it correctly.

GraphQL

union SearchResult = [1] | [2] | Author

query { search(id: 3) { ... on [3] { title } ... on Author { name } } }

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

ABook

BMovie

CPublisher

DDirector

Attempts:

3 left

💡 Hint

Common Mistakes

Using scalar types in union.

Mismatch between union types and query fragments.

The union includes Director, Movie, and Author. The query uses an inline fragment on Movie to get the title.