freenetis-github/system/libraries/ORM_Tree.php @ b79f77ca
| 8baed187 | Michal Kliment | <?php defined('SYSPATH') OR die('No direct access allowed.');
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/**
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* Object Relational Mapping (ORM) "tree" extension. Allows ORM objects to act
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* as trees, with parents and children.
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*
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* $Id: ORM_Tree.php 3923 2009-01-22 15:37:04Z samsoir $
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*
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* @package ORM
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* @author Kohana Team
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* @copyright (c) 2007-2008 Kohana Team
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* @license http://kohanaphp.com/license.html
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*/
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class ORM_Tree extends ORM {
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// Name of the child
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protected $ORM_Tree_children;
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// Parent keyword name
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protected $ORM_Tree_parent_key = 'parent_id';
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/**
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* Overload ORM::__get to support "parent" and "children" properties.
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*
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* @param string column name
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* @return mixed
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*/
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public function __get($column)
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{
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if ($column === 'parent')
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{
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if (empty($this->related[$column]))
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{
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// Load child model
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$model = ORM::factory(inflector::singular($this->ORM_Tree_children));
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if (array_key_exists($this->ORM_Tree_parent_key, $this->object))
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{
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// Find children of this parent
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$model->where($model->primary_key, $this->object[$this->ORM_Tree_parent_key])->find();
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}
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$this->related[$column] = $model;
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}
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return $this->related[$column];
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}
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elseif ($column === 'children')
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{
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if (empty($this->related[$column]))
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{
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$model = ORM::factory(inflector::singular($this->ORM_Tree_children));
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if ($this->ORM_Tree_children === $this->table_name)
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{
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// Load children within this table
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$this->related[$column] = $model
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->where($this->ORM_Tree_parent_key, $this->object[$this->primary_key])
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->find_all();
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}
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else
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{
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// Find first selection of children
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$this->related[$column] = $model
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->where($this->foreign_key(), $this->object[$this->primary_key])
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->where($this->ORM_Tree_parent_key, NULL)
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->find_all();
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}
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}
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return $this->related[$column];
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}
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return parent::__get($column);
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}
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} // End ORM Tree
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