frontend\modules\user\models\UserMeta::beforeSave PHP Method

    public function beforeSave($insert)
    {
        if ($insert) {
            $userActionNotify = (new NotificationService())->findUserActionNotify($this);
            if ($userActionNotify) {
                $userActionNotify->delete();
            }
            // 点赞、感谢和收藏会收到通知
            if (in_array($this->type, ['like', 'favorite', 'thanks'])) {
                switch ($this->target_type) {
                    case 'topic':
                        (new NotificationService())->newActionNotify($this->target_type . '_' . $this->type, Yii::$app->user->id, $this->topic->user_id, $this->topic);
                        break;
                    case 'tweet':
                        (new NotificationService())->newActionNotify($this->target_type . '_' . $this->type, Yii::$app->user->id, $this->tweet->user_id, $this->tweet);
                        break;
                    case 'comment':
                        (new NotificationService())->newActionNotify($this->target_type . '_' . $this->type, Yii::$app->user->id, $this->comment->user_id, $this->comment->topic, $this->comment);
                        break;
                    default:
                        break;
                }
            }
        }
        return parent::beforeSave($insert);
    }