yii\validators\CompareValidator::validateValue PHP Метод

    protected function validateValue($value)
    {
        if ($this->compareValue === null) {
            throw new InvalidConfigException('CompareValidator::compareValue must be set.');
        }
        if (!$this->compareValues($this->operator, $this->type, $value, $this->compareValue)) {
            return [$this->message, ['compareAttribute' => $this->compareValue, 'compareValue' => $this->compareValue, 'compareValueOrAttribute' => $this->compareValue]];
        } else {
            return null;
        }
    }