FOF30\Model\DataModel\Relation\BelongsToMany::saveRelations PHP Метод

    public function saveRelations()
    {
        // Get all the new keys
        $newKeys = array();
        if ($this->data instanceof DataModel\Collection) {
            foreach ($this->data as $item) {
                if ($item instanceof DataModel) {
                    $newKeys[] = $item->getId();
                } elseif (!is_object($item)) {
                    $newKeys[] = $item;
                }
            }
        }
        $newKeys = array_unique($newKeys);
        $db = $this->parentModel->getDbo();
        $localKeyValue = $this->parentModel->getFieldValue($this->localKey);
        // Kill all existing relations in the pivot table
        $query = $db->getQuery(true)->delete($db->qn($this->pivotTable))->where($db->qn($this->pivotLocalKey) . ' = ' . $db->q($localKeyValue));
        $db->setQuery($query);
        $db->execute();
        // Write the new relations to the database
        $protoQuery = $db->getQuery(true)->insert($db->qn($this->pivotTable))->columns(array($db->qn($this->pivotLocalKey), $db->qn($this->pivotForeignKey)));
        $i = 0;
        $query = null;
        foreach ($newKeys as $key) {
            $i++;
            if (is_null($query)) {
                $query = clone $protoQuery;
            }
            $query->values($db->q($localKeyValue) . ', ' . $db->q($key));
            if ($i % 50 == 0) {
                $db->setQuery($query);
                $db->execute();
                $query = null;
            }
        }
        if (!is_null($query)) {
            $db->setQuery($query);
            $db->execute();
        }
    }