How to properly work with beforeValidate and isNewRecord in yii2?

Question

Yii

Hello. Time after time I run into the same problem.
For new entries in the database, I need to fill in some fields, such as the update date. To achieve my goal, I use a public function beforeValidate() and an if ($this->isNewRecord) which should literally fire "do before validation" and "if the record is new". But in fact $this->dtUpdate=time(); is always performed. It doesn't matter if the record is new or not.
If, for example, I display data in a GridView with the ability to filter, then the dtUpdate field for filters will always be filled with the current date..

Answer 1

public function beforeSave($insert)
    {
         if ($insert){ ваш код }
        return parent::beforeSave($insert); // TODO: Change the autogenerated stub
    }

But it is better to translate these behaviors into Behaviours.