From eba717f95f586d2538007bd18da6e9b32b076c30 Mon Sep 17 00:00:00 2001
From: Bharat Mediratta <bharat@menalto.com>
Date: Fri, 31 Oct 2008 22:12:14 +0000
Subject: Merge over vendor code.

git-svn-id: http://gallery.svn.sourceforge.net/svnroot/gallery/trunk/eval/gx/gallery3/trunk@18408 57fcd75e-5312-0410-8df3-f5eb6fbb1595
---
 kohana/libraries/ORM_Tree.php | 76 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 kohana/libraries/ORM_Tree.php

(limited to 'kohana/libraries/ORM_Tree.php')

diff --git a/kohana/libraries/ORM_Tree.php b/kohana/libraries/ORM_Tree.php
new file mode 100644
index 00000000..ff5f62f1
--- /dev/null
+++ b/kohana/libraries/ORM_Tree.php
@@ -0,0 +1,76 @@
+<?php defined('SYSPATH') or die('No direct script access.');
+/**
+ * Object Relational Mapping (ORM) "tree" extension. Allows ORM objects to act
+ * as trees, with parents and children.
+ *
+ * $Id$
+ *
+ * @package    Core
+ * @author     Kohana Team
+ * @copyright  (c) 2007-2008 Kohana Team
+ * @license    http://kohanaphp.com/license.html
+ */
+class ORM_Tree_Core extends ORM {
+
+	// Name of the child
+	protected $children;
+
+	// Parent keyword name
+	protected $parent_key = 'parent_id';
+
+	/**
+	 * Overload ORM::__get to support "parent" and "children" properties.
+	 *
+	 * @param   string  column name
+	 * @return  mixed
+	 */
+	public function __get($column)
+	{
+		if ($column === 'parent')
+		{
+			if (empty($this->related[$column]))
+			{
+				// Load child model
+				$model = ORM::factory(inflector::singular($this->children));
+
+				if (isset($this->object[$this->parent_key]))
+				{
+					// Find children of this parent
+					$model->where($this->parent_key, $this->object[$this->parent_key])->find();
+				}
+
+				$this->related[$column] = $model;
+			}
+
+			return $this->related[$column];
+		}
+		elseif ($column === 'children')
+		{
+			if (empty($this->related[$column]))
+			{
+				$model = ORM::factory(inflector::singular($this->children));
+
+				if ($this->children === $this->table_name)
+				{
+					// Load children within this table
+					$this->related[$column] = $model
+						->where($this->parent_key, $this->object[$this->primary_key])
+						->find_all();
+				}
+				else
+				{
+					// Find first selection of children
+					$this->related[$column] = $model
+						->where($this->foreign_key(), $this->object[$this->primary_key])
+						->where($this->parent_key, NULL)
+						->find_all();
+				}
+			}
+
+			return $this->related[$column];
+		}
+
+		return parent::__get($column);
+	}
+
+} // End ORM Tree
\ No newline at end of file
-- 
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