Phalcon\Validation\Validator\Db\Uniqueness::__construct PHP Method

    public function __construct(array $options = [], DbConnection $db = null)
    {
        parent::__construct($options);
        if (!$db) {
            // try to get db instance from default Dependency Injection
            $di = Di::getDefault();
            if ($di instanceof DiInterface && $di->has('db')) {
                $db = $di->get('db');
            }
        }
        if (!$db instanceof DbConnection) {
            throw new ValidationException('Validator Uniqueness require connection to database');
        }
        if (!$this->hasOption('table')) {
            throw new ValidationException('Validator require table option to be set');
        }
        if (!$this->hasOption('column')) {
            throw new ValidationException('Validator require column option to be set');
        }
        if ($this->hasOption('exclude')) {
            $exclude = $this->getOption('exclude');
            if (!isset($exclude['column']) || empty($exclude['column'])) {
                throw new ValidationException('Validator with "exclude" option require column option to be set');
            }
            if (!isset($exclude['value']) || empty($exclude['value'])) {
                throw new ValidationException('Validator with "exclude" option require value option to be set');
            }
        }
        $this->db = $db;
    }