custom-meta.php

<?php
/**
 * custom meta
 *
 * @package workshops-cpt
 */

namespace gemeindetag\workshops;

// Exit if accessed directly.
defined( 'ABSPATH' ) || exit;

// nr: Int
// leiter: String
// startZeit: String
// endZeit: String
// beschränkt: Bool
// maxPlätze: Int

$string           = [
	'type'         => 'string',
	'single'       => true,
	'show_in_rest' => true,
];
$boolean          = [
	'type'         => 'boolean',
	'single'       => true,
	'show_in_rest' => true,
];
$number           = [
	'type'         => 'number',
	'single'       => true,
	'show_in_rest' => true,
];
$multiple_numbers = [
	'type'         => 'number',
	'single'       => false,
	'show_in_rest' => true,
];

register_post_meta( 'workshops', 'nr', $number );
register_post_meta( 'workshops', 'character', $string );
register_post_meta( 'workshops', 'leiter', $string );
register_post_meta( 'workshops', 'ort', $string );
register_post_meta( 'workshops', 'beschreibung', $string );
register_post_meta( 'workshops', 'startZeit', $string );
register_post_meta( 'workshops', 'endZeit', $string );
register_post_meta( 'workshops', 'beschraenkt', $boolean );
register_post_meta( 'workshops', 'maxPlaetze', $number );
register_post_meta( 'workshops', 'preis', $number );
register_post_meta( 'workshops', 'registrationClosed', $boolean );