register_graphql_object_type

Add an Object Type to the GraphQL Schema

register_graphql_object_type( string $type_name, array $config );

Parameters

$type_name (string): The name of the Type. This must be unique across all Types of any kind in the GraphQL Schema.
$config (array):
- $description (string): Description of the Object Type. What does it represent? This will be used in Introspection for for self-documenting the Type in the Schema.
- $fields (array): Associative array of key/value pairs. The key being the field name and the value being the field config.
  - $name (string): The name of the field
  - $config (array): Config for the field to add to the Type
    - $type: (string): The name of the GraphQL Type the field should return.
    - $description (string): Description of the field. What does the field represent? This will be used in Introspection to self-document the Schema.
    - $resolve (function): The function that will execute when the field is asked for in a query.

Source

File: access-functions.php

Examples

Below are some examples of using the function to extend the GraphQL Schema.

Register a new Type with a single field

This example shows how to register a new type called MyNewType which contains a String field.

add_action( 'graphql_register_types', function() { 

  register_graphql_object_type( 'MyNewType', [
    'description' => __( 'Describe the Type and what it represents', 'replace-me' ),
    'fields' => [
      'testField' => [
        'type' => 'String', 
        'description' => __( 'Describe what this field should be used for', 'replace-me' ),
      ],
    ],
  ] );

} );

You can view this type in the documentation section of GraphiQL:

Documentation for a single field object type called MyNewType

Register a new type with multiple fields

This example shows how to register a new type called MyMultifieldType which contains a String and an Int field.

register_graphql_object_type( 'MyMultifieldType', [
	'description' => __( 'Describe what MyMultifieldType is', 'replace-me' ),
	'fields' => [
		'testField' => [
			'type' => 'String',
			'description' => __( 'Describe what testField should be used for', 'replace-me' ),
		],
		'count' => [
			'type' => 'Int',
			'description' => __( 'Describe what the count field should be used for', 'replace-me' ),
		],
	],
] );