WP_REST_Controller::add_additional_fields_to_object( array $prepared, WP_REST_Request $request )

Source

File: wp-includes/rest-api/endpoints/class-wp-rest-controller.php

protected function add_additional_fields_to_object( $prepared, $request ) {

		$additional_fields = $this->get_additional_fields();

		$requested_fields = $this->get_fields_for_response( $request );

		foreach ( $additional_fields as $field_name => $field_options ) {
			if ( ! $field_options['get_callback'] ) {
				continue;
			}

			if ( ! rest_is_field_included( $field_name, $requested_fields ) ) {
				continue;
			}

			$prepared[ $field_name ] = call_user_func( $field_options['get_callback'], $prepared, $field_name, $request, $this->get_object_type() );
		}

		return $prepared;
	}