dosamigos\taggable\Taggable::beforeDelete PHP Method

    public function beforeDelete($event)
    {
        $relation = $this->owner->getRelation($this->relation);
        $pivot = $relation->via->from[0];
        /** @var ActiveRecord $class */
        $class = $relation->modelClass;
        $query = new Query();
        $pks = $query->select(current($relation->link))->from($pivot)->where([key($relation->via->link) => $this->owner->getPrimaryKey()])->column($this->owner->getDb());
        if (!empty($pks)) {
            $class::updateAllCounters([$this->frequency => -1], ['in', $class::primaryKey(), $pks]);
        }
        $this->owner->getDb()->createCommand()->delete($pivot, [key($relation->via->link) => $this->owner->getPrimaryKey()])->execute();
    }