CodeIgniter extended Model Class

MY_Model.php

<?php if (!defined('BASEPATH')) exit('No direct script access allowed.');

/* MY_Model
* Reorganizes the $DB::result() object passed to it so joined
* tables are child-objects of the result object, rather than
* first-class variables. Pretty strict on the way it works.
*
* Example:
*	protected $relationships = array(
*		'has_one' => array(
*			'company'
*		)
*	);
*
*	function get() {
*		$this->db->select('users.*')
*			->select('companies.name AS company_name')
*			->from('users')
*			->join('companies', 'companies.id = users.company_id');
*		$query = $this->db->get();
*
*		if ($query->num_rows($result) > 0) {
*			return $this->_objectify($query->result());
*		}
*
*		return NULL;
*	}
*/
class MY_Model extends CI_Model {

	private $_result;

	public function __construct() {
		parent::__construct();
	}
	
	
	/* _objectify()
	* Reformats the result object so foreign keys are child objects
	*
	* @access	private
	* @params	$DB::result()
	* @returns	stdClass
	*/
	protected function _objectify($result) {
		$this->_result = $result;
		foreach ($this->relationships['has_one'] as $has_one) {
			$this->_has_one($has_one);
		}
		
		return $this->_result;
	}
	
	/* _has_one()
	* Reformats the result object for has_one relationships
	*
	* @access	private
	* @params	string
	* @returns	void
	*/
	private function _has_one($child) {
		if (is_array($this->_result)) {
			foreach ($this->_result as $key => $result) {
				$fk = $child . '_id';
				if (isset($result->$fk)) {
					$result->$child = new stdClass();
					
					foreach ($result as $key => $val) {
						if (substr($key, 0, strlen($child) + 1) == $child . '_') {
							$new_key = substr($key, (strlen($child) + 1) - strlen($key));
							$result->$child->$new_key = $val;
							unset($result->$key);
						}
					
					}
				}
			}
		}
	}

}