yii\validators\CompareValidator::init PHP Метод

    public function init()
    {
        parent::init();
        if ($this->message === null) {
            switch ($this->operator) {
                case '==':
                    $this->message = Yii::t('yii', '{attribute} must be equal to "{compareValueOrAttribute}".');
                    break;
                case '===':
                    $this->message = Yii::t('yii', '{attribute} must be equal to "{compareValueOrAttribute}".');
                    break;
                case '!=':
                    $this->message = Yii::t('yii', '{attribute} must not be equal to "{compareValueOrAttribute}".');
                    break;
                case '!==':
                    $this->message = Yii::t('yii', '{attribute} must not be equal to "{compareValueOrAttribute}".');
                    break;
                case '>':
                    $this->message = Yii::t('yii', '{attribute} must be greater than "{compareValueOrAttribute}".');
                    break;
                case '>=':
                    $this->message = Yii::t('yii', '{attribute} must be greater than or equal to "{compareValueOrAttribute}".');
                    break;
                case '<':
                    $this->message = Yii::t('yii', '{attribute} must be less than "{compareValueOrAttribute}".');
                    break;
                case '<=':
                    $this->message = Yii::t('yii', '{attribute} must be less than or equal to "{compareValueOrAttribute}".');
                    break;
                default:
                    throw new InvalidConfigException("Unknown operator: {$this->operator}");
            }
        }
    }