Search across types in GraphQL - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does 'Search across types' mean in GraphQL?

It means querying multiple different data types in a single search, so you can find results from various categories or objects at once.

intermediate

How can you search across different types in GraphQL?

By using a union or interface type that groups multiple types together, then querying that union or interface to get results from all included types.

beginner

What is a GraphQL union type?

A union type lets you combine multiple object types into one, so a query can return different types of objects in the same field.

intermediate

Why use fragments when searching across types?

Fragments let you specify which fields to get from each type in a union or interface, so you get the right data for each kind of result.

intermediate

Example: How to write a query that searches across 'Book' and 'Author' types?

Use a union type like 'union SearchResult = Book | Author' and query it with fragments for each type to get fields like title for Book and name for Author.

What GraphQL feature allows combining multiple types for a single search?

A Input type

B Scalar type

C Union type

D Enum type

Union types let you combine multiple object types so a field can return different types.

When querying a union type, how do you specify fields for each type?

A Using fragments

B Using variables

C Using directives

D Using enums

Fragments let you define fields for each type inside a union or interface.

Which of these is NOT a valid use of searching across types?

A Getting user and product info together

B Returning only scalar values

C Finding books and authors in one query

D Searching multiple categories at once

Searching across types involves objects, not just scalar values.

What keyword defines a union type in GraphQL schema?

A enum

B interface

C type

D union

'union' keyword is used to define a union type.

Can you use interfaces instead of unions for searching across types?

A Yes, interfaces can also group types

B No, only unions work

C Only with scalar types

D Only in mutations

Interfaces can also group types and be used for searching across types.

Explain how to perform a search across multiple types in GraphQL.

Think about how to combine types and get fields from each.

Describe the difference between union types and interfaces when searching across types.

Consider how each groups types and what fields they require.