GraphQLNonNull <T>

Non-Null Type Wrapper

A non-null is a wrapping type which points to another type. Non-null types enforce that their values are never null and can ensure an error is raised if this ever occurs during a request. It is useful for fields which you can make a strong guarantee on non-nullability, for example usually the id field of a database row will never be null.

Example:

const RowType = new GraphQLObjectType({
  name: 'Row',
  fields: () => ({
    id: { type: new GraphQLNonNull(GraphQLString) },
  })
})

Note: the enforcement of non-nullability occurs within the executor.

Implements

• GraphQLSchemaElement

Index

Constructors

• constructor

Properties

• ofType

Accessors

• [toStringTag]

Methods

• toJSON
• toString

Constructors

constructor

• new GraphQLNonNull<T>(ofType: T): GraphQLNonNull<T>

• Type parameters

  • T: GraphQLNullableType

  Parameters

  • ofType: T

  Returns GraphQLNonNull<T>

Properties

readonlyofType

ofType: T

Accessors

[toStringTag]

• get [toStringTag](): string

• Returns string

Methods

toJSON

• toJSON(): string

• Implementation of GraphQLSchemaElement.toJSON

  Returns string

toString

• toString(): string

• Implementation of GraphQLSchemaElement.toString

  Returns string