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More additions to the NestedSet implementation: Added $node->makeRoot() which can be used when using many roots to detach a node from a tree and make it a root node itself.

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romanb 2007-05-07 18:29:52 +00:00
parent e90e62c9f7
commit f0236dc9a1
1 changed files with 53 additions and 0 deletions
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53
lib/Doctrine/Node/NestedSet.php
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@ -538,6 +538,59 @@ class Doctrine_Node_NestedSet extends Doctrine_Node implements Doctrine_Node_Int
$this->updateNode($dest->getNode()->getRightValue());
}
}
/**
* Enter description here...
*
* @todo Exception handling/wrapping
*/
public function makeRoot()
{
// TODO: throw exception instead?
if ($this->getLeftValue() == 1 || !$this->record->getTable()->getTree()->getAttribute('hasManyRoots')) {
return false;
}
$oldRgt = $this->getRightValue();
$oldLft = $this->getLeftValue();
$oldRoot = $this->getRootValue();
try {
$conn = $this->record->getTable()->getConnection();
$conn->beginTransaction();
// Detach from old tree
$first = $oldRgt + 1;
$delta = $oldLft - $oldRgt - 1;
$this->shiftRLValues($first, $delta, $this->getRootValue());
// Set new lft/rgt/root values for root node
$this->setLeftValue(1);
$this->setRightValue($oldRgt - $oldLft + 1);
$this->setRootValue($this->record->id);
// Update descendants lft/rgt/root values
$diff = 1 - $oldLft;
$newRoot = $this->record->id;
$componentName = $this->record->getTable()->getComponentName();
$rootColName = $this->record->getTable()->getTree()->getAttribute('rootColumnName');
$q = $this->record->getTable()->createQuery();
$q = $q->update($componentName)
->set($componentName . '.lft', 'lft + ' . $diff)
->set($componentName . '.rgt', 'rgt + ' . $diff)
->set($componentName . '.' . $rootColName, $newRoot)
->where($componentName . '.lft > ? AND ' . $componentName . '.rgt < ?',
array($oldLft, $oldRgt));
$q = $this->record->getTable()->getTree()->returnQueryWithRootId($q, $oldRoot);
$q->execute();
$conn->commit();
}
catch (Exception $e) {
$conn->rollback();
throw $e;
}
}
/**
* adds node as last child of record