db\BaseActiveRecord beforeSave()

This method is called at the beginning of inserting or updating a record.

The default implementation will trigger an EVENT_BEFORE_INSERT event when $insert is true, or an EVENT_BEFORE_UPDATE event if $insert is false. When overriding this method, make sure you call the parent implementation like the following:

public function beforeSave($insert)
{
    if (parent::beforeSave($insert)) {
        // ...custom code here...
        return true;
    } else {
        return false;
    }
}