Nextras\Orm\Relationships\ManyHasMany::doPersist PHP Метод

    public function doPersist()
    {
        if (!$this->isModified) {
            return;
        }
        $toRemove = [];
        foreach ($this->toRemove as $entity) {
            $id = $entity->getValue('id');
            $toRemove[$id] = $id;
        }
        $toAdd = [];
        foreach ($this->toAdd as $entity) {
            $id = $entity->getValue('id');
            $toAdd[$id] = $id;
        }
        $this->added += $this->toAdd;
        $this->removed += $this->toRemove;
        $this->toAdd = [];
        $this->toRemove = [];
        $this->isModified = false;
        $this->collection = null;
        if ($this->metadata->relationship->isMain) {
            $this->getRelationshipMapper()->remove($this->parent, $toRemove);
            $this->getRelationshipMapper()->add($this->parent, $toAdd);
        }
    }