EntityTestUuidId.php

<?php

declare (strict_types=1);
namespace Drupal\entity_test\Entity;

use Drupal\Component\Uuid\UuidInterface;
use Drupal\Core\Field\BaseFieldDefinition;
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;

/**
 * Defines a test entity class with UUIDs as IDs.
 *
 * @ContentEntityType(
 *   id = "entity_test_uuid_id",
 *   label = @Translation("Test entity with UUIDs as IDs"),
 *   handlers = {
 *     "access" = "Drupal\entity_test\EntityTestAccessControlHandler",
 *     "form" = {
 *       "default" = "Drupal\entity_test\EntityTestForm"
 *     },
 *     "route_provider" = {
 *       "html" = "Drupal\Core\Entity\Routing\DefaultHtmlRouteProvider",
 *     },
 *   },
 *   translatable = TRUE,
 *   base_table = "entity_test_uuid_id",
 *   data_table = "entity_test_uuid_id_data",
 *   admin_permission = "administer entity_test content",
 *   entity_keys = {
 *     "id" = "uuid",
 *     "uuid" = "uuid",
 *     "bundle" = "type",
 *     "langcode" = "langcode",
 *     "label" = "name",
 *   },
 *   links = {
 *     "canonical" = "/entity_test_uuid_id/manage/{entity_test_uuid_id}",
 *     "add-form" = "/entity_test_uuid_id/add",
 *     "edit-form" = "/entity_test_uuid_id/manage/{entity_test_uuid_id}/edit",
 *   },
 * )
 */
class EntityTestUuidId extends EntityTest {
    
    /**
     * {@inheritdoc}
     */
    public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
        $fields = parent::baseFieldDefinitions($entity_type);
        // Configure a string field to match the UUID field configuration and use it
        // for both the ID and the UUID key. The UUID field type cannot be used
        // because it would add a unique key to the data table.
        $fields[$entity_type->getKey('uuid')] = BaseFieldDefinition::create('string')->setLabel(new TranslatableMarkup('UUID'))
            ->setSetting('max_length', 128)
            ->setSetting('is_ascii', TRUE)
            ->setDefaultValueCallback(static::class . '::generateUuid');
        return $fields;
    }
    
    /**
     * Statically generates a UUID.
     *
     * @return string
     *   A newly generated UUID.
     */
    public static function generateUuid() : string {
        $uuid = \Drupal::service('uuid');
        assert($uuid instanceof UuidInterface);
        return $uuid->generate();
    }

}