Schema documentation in GraphQL - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is schema documentation in GraphQL?

Schema documentation in GraphQL is the practice of adding descriptions to types, fields, and arguments in the schema to explain their purpose and usage clearly.

beginner

How do you add a description to a GraphQL type or field?

You add a description by placing a string in triple quotes ("""Description""") just before the type or field definition in the schema.

beginner

Why is schema documentation important in GraphQL?

It helps developers understand what each part of the schema does, making it easier to use and maintain the API without confusion.

intermediate

Can you document arguments in GraphQL schema? How?

Yes, you can add descriptions to arguments by placing triple-quoted strings just before the argument definition inside the field.

intermediate

What tools can use GraphQL schema documentation to improve developer experience?

Tools like GraphiQL, Apollo Studio, and GraphQL Playground use schema documentation to show helpful descriptions and hints while exploring the API.

How do you add a description to a GraphQL field?

A Use a special @doc directive

B Add a comment with // before the field

C Place a triple-quoted string before the field definition

D Descriptions are not supported in GraphQL

GraphQL uses triple-quoted strings placed before types or fields to add descriptions.

What is the main benefit of schema documentation in GraphQL?

A Improves API security

B Helps developers understand the API

C Speeds up query execution

D Automatically generates database tables

Schema documentation helps developers understand the API's purpose and usage.

Can you document arguments in a GraphQL schema?

A Yes, by placing triple-quoted strings before the argument

B Yes, but only in comments outside the schema

C No, only types and fields can be documented

D No, arguments are self-explanatory

Arguments can have descriptions by placing triple-quoted strings before them.

Which of these tools uses GraphQL schema documentation to show descriptions?

A GraphiQL

B MySQL Workbench

C Postman

D MongoDB Compass

GraphiQL uses schema documentation to display helpful descriptions.

What syntax is used for descriptions in GraphQL schema?

A JSON objects

B Single-line comments with //

C XML tags <desc></desc>

D Triple-quoted strings """Description"""

GraphQL uses triple-quoted strings for descriptions.

Explain how to add documentation to a GraphQL schema and why it is useful.

Think about how descriptions appear in the schema and how tools use them.

Describe the role of schema documentation in GraphQL developer tools.

Consider how tools like GraphiQL display schema info.