EntityTestStringId.php

<?php

namespace Drupal\entity_test\Entity;

use Drupal\Core\Field\BaseFieldDefinition;
use Drupal\Core\Entity\EntityTypeInterface;

/**
 * Defines a test entity class with a string ID.
 *
 * @ContentEntityType(
 *   id = "entity_test_string_id",
 *   label = @Translation("Test entity with string_id"),
 *   handlers = {
 *     "access" = "Drupal\entity_test\EntityTestAccessControlHandler",
 *     "form" = {
 *       "default" = "Drupal\entity_test\EntityTestForm"
 *     },
 *     "route_provider" = {
 *       "html" = "Drupal\Core\Entity\Routing\DefaultHtmlRouteProvider",
 *     },
 *   },
 *   base_table = "entity_test_string",
 *   admin_permission = "administer entity_test content",
 *   entity_keys = {
 *     "id" = "id",
 *     "uuid" = "uuid",
 *     "bundle" = "type",
 *     "label" = "name",
 *   },
 *   links = {
 *     "canonical" = "/entity_test_string_id/manage/{entity_test_string_id}",
 *     "add-form" = "/entity_test_string_id/add",
 *     "edit-form" = "/entity_test_string_id/manage/{entity_test_string_id}",
 *   },
 *   field_ui_base_route = "entity.entity_test_string_id.admin_form",
 * )
 */
class EntityTestStringId extends EntityTest {
    
    /**
     * {@inheritdoc}
     */
    public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
        $fields = parent::baseFieldDefinitions($entity_type);
        $fields['id'] = BaseFieldDefinition::create('string')->setLabel(t('ID'))
            ->setDescription(t('The ID of the test entity.'))
            ->setReadOnly(TRUE)
            ->setSetting('is_ascii', TRUE);
        return $fields;
    }

}