uniquevalidator.php

<?php
namespace Bitrix\Main\ORM\Fields\Validators;
 
use Bitrix\Main\ORM;
use Bitrix\Main\ORM\Query\Query;
use Bitrix\Main\Localization\Loc;
 
Loc::loadMessages(__FILE__);
 
class UniqueValidator extends Validator
{
    protected $errorPhraseCode = 'MAIN_ENTITY_VALIDATOR_UNIQUE';
 
    public function validate($value, $primary, array $row, ORM\Fields\Field $field)
    {
        $entity = $field->getEntity();
        $primaryNames = $entity->getPrimaryArray();
 
        $query = new Query($entity);
        $query->setSelect($primaryNames);
        $query->setFilter(array('='.$field->getName() => $value));
        $query->setLimit(2);
        $result = $query->exec();
 
        while ($existing = $result->fetch())
        {
            // check primary
            foreach ($existing as $k => $v)
            {
                if (!isset($primary[$k]) || $primary[$k] != $existing[$k])
                {
                    return $this->getErrorMessage($value, $field);
                }
            }
        }
 
        return true;
    }
}