GraphQL·GraphQL essentials

Schema

A schema defines types, fields and operations.

Intermediate 10 min read Lesson 1 of 150 Challenge included
What you will be able to do
  • Use type Query.
  • Define object types.
  • Make fields nullable deliberately.

In plain English

A schema defines types, fields and operations.

  • Use type Query.
  • Define object types.
  • Make fields nullable deliberately.
schema.graphqlJavaScript
type Course {
  slug: ID!
  title: String!
  minutes: Int!
}

type Query {
  courses: [Course!]!
}
Your turn

Explain it back

Easy

Answer from memory: What does ! mean in GraphQL?

TEXT · starter
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Knowledge checkQuestion 1

What does ! mean in GraphQL?

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