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eba717f95f
git-svn-id: http://gallery.svn.sourceforge.net/svnroot/gallery/trunk/eval/gx/gallery3/trunk@18408 57fcd75e-5312-0410-8df3-f5eb6fbb1595
76 lines
1.7 KiB
PHP
76 lines
1.7 KiB
PHP
<?php defined('SYSPATH') or die('No direct script access.');
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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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* $Id$
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*
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* @package Core
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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_Core extends ORM {
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// Name of the child
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protected $children;
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// Parent keyword name
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protected $parent_key = 'parent_id';
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/**
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* Overload ORM::__get to support "parent" and "children" properties.
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*
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* @param string column name
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* @return mixed
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*/
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public function __get($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($this->children));
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if (isset($this->object[$this->parent_key]))
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{
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// Find children of this parent
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$model->where($this->parent_key, $this->object[$this->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($this->children));
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if ($this->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->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->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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