EntityHasFieldConstraint.php

<?php

namespace Drupal\Core\Entity\Plugin\Validation\Constraint;

use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\Core\Validation\Attribute\Constraint;
use Symfony\Component\Validator\Attribute\HasNamedArguments;
use Symfony\Component\Validator\Constraint as SymfonyConstraint;

/**
 * Checks if a value is an entity that has a specific field.
 */
class EntityHasFieldConstraint extends SymfonyConstraint {
  
  /**
   * The field name option.
   *
   * @var string
   */
  // phpcs:ignore Drupal.NamingConventions.ValidVariableName.LowerCamelName
  public $field_name;
  public function __construct(mixed $options = NULL, ?string $field_name = NULL, public $message = 'The entity must have the %field_name field.', public $notFieldableMessage = 'The entity does not support fields.', ?array $groups = NULL, mixed $payload = NULL) {
    parent::__construct($options, $groups, $payload);
    $this->field_name = $field_name ?? $this->field_name;
  }
  
  /**
   * {@inheritdoc}
   */
  public function getDefaultOption() : ?string {
    return 'field_name';
  }
  
  /**
   * {@inheritdoc}
   */
  public function getRequiredOptions() : array {
    return (array) $this->getDefaultOption();
  }

}