Phalcon\Mvc\Model\Behavior\NestedSet::moveAsRoot PHP Method

    public function moveAsRoot()
    {
        $owner = $this->getOwner();
        if (!$this->hasManyRoots) {
            throw new Exception('Many roots mode is off.');
        }
        if ($this->getIsNewRecord()) {
            throw new Exception('The node should not be new record.');
        }
        if ($this->getIsDeletedRecord()) {
            throw new Exception('The node should not be deleted.');
        }
        if ($owner->isRoot()) {
            throw new Exception('The node already is root node.');
        }
        $this->db->begin();
        $left = $owner->{$this->leftAttribute};
        $right = $owner->{$this->rightAttribute};
        $levelDelta = 1 - $owner->{$this->levelAttribute};
        $delta = 1 - $left;
        $condition = $this->leftAttribute . '>=' . $left . ' AND ';
        $condition .= $this->rightAttribute . '<=' . $right . ' AND ';
        $condition .= $this->rootAttribute . '=' . $owner->{$this->rootAttribute};
        $this->ignoreEvent = true;
        foreach ($owner::find($condition) as $i) {
            $arr = [$this->leftAttribute => $i->{$this->leftAttribute} + $delta, $this->rightAttribute => $i->{$this->rightAttribute} + $delta, $this->levelAttribute => $i->{$this->levelAttribute} + $levelDelta, $this->rootAttribute => $owner->{$this->primaryKey}];
            if ($i->update($arr) == false) {
                $this->db->rollback();
                $this->ignoreEvent = false;
                return false;
            }
        }
        $this->ignoreEvent = false;
        $this->shiftLeftRight($right + 1, $left - $right - 1);
        $this->db->commit();
        return true;
    }