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| 1 | <?php |
| 2 | |
| 3 | namespace Drupal\crm\Plugin\Validation\Constraint; |
| 4 | |
| 5 | use Drupal\Core\StringTranslation\TranslatableMarkup; |
| 6 | use Drupal\Core\Validation\Attribute\Constraint; |
| 7 | use Symfony\Component\Validator\Constraint as SymfonyConstraint; |
| 8 | |
| 9 | /** |
| 10 | * Entity Reference unique reference constraint. |
| 11 | * |
| 12 | * Verifies that referenced entities referenced only once. |
| 13 | */ |
| 14 | #[Constraint( |
| 15 | id: 'UniqueReference', |
| 16 | label: new TranslatableMarkup('Unique Entity Reference reference', [], ['context' => 'Validation']) |
| 17 | )] |
| 18 | class UniqueReferenceConstraint extends SymfonyConstraint { |
| 19 | |
| 20 | /** |
| 21 | * The default violation message. |
| 22 | * |
| 23 | * @var string |
| 24 | */ |
| 25 | public $message = 'A @entity_type with @field_name referencing entity with ID @id already exists.'; |
| 26 | |
| 27 | } |