libraries/Model.php

   1 <?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
   2 /**
   3  * CodeIgniter
   4  *
   5  * An open source application development framework for PHP 4.3.2 or newer
   6  *
   7  * @package             CodeIgniter
   8  * @author              ExpressionEngine Dev Team
   9  * @copyright   Copyright (c) 2008 - 2009, EllisLab, Inc.
  10  * @license             http://codeigniter.com/user_guide/license.html
  11  * @link                http://codeigniter.com
  12  * @since               Version 1.0
  13  * @filesource
  14  */
  15
  16 // ------------------------------------------------------------------------
  17
  18 /**
  19  * CodeIgniter Model Class
  20  *
  21  * @package             CodeIgniter
  22  * @subpackage  Libraries
  23  * @category    Libraries
  24  * @author              ExpressionEngine Dev Team
  25  * @link                http://codeigniter.com/user_guide/libraries/config.html
  26  */
  27 class Model {
  28
  29         var $_parent_name = '';
  30
  31         /**
  32          * Constructor
  33          *
  34          * @access public
  35          */
  36         function Model()
  37         {
  38                 // If the magic __get() or __set() methods are used in a Model references can't be used.
  39                 $this->_assign_libraries( (method_exists($this, '__get') OR method_exists($this, '__set')) ? FALSE : TRUE );
  40
  41                 // We don't want to assign the model object to itself when using the
  42                 // assign_libraries function below so we'll grab the name of the model parent
  43                 $this->_parent_name = ucfirst(get_class($this));
  44
  45                 log_message('debug', "Model Class Initialized");
  46         }
  47
  48         /**
  49          * Assign Libraries
  50          *
  51          * Creates local references to all currently instantiated objects
  52          * so that any syntax that can be legally used in a controller
  53          * can be used within models.
  54          *
  55          * @access private
  56          */
  57         function _assign_libraries($use_reference = TRUE)
  58         {
  59                 $CI =& get_instance();
  60                 foreach (array_keys(get_object_vars($CI)) as $key)
  61                 {
  62                         if ( ! isset($this->$key) AND $key != $this->_parent_name)
  63                         {
  64                                 // In some cases using references can cause
  65                                 // problems so we'll conditionally use them
  66                                 if ($use_reference == TRUE)
  67                                 {
  68                                         $this->$key = NULL; // Needed to prevent reference errors with some configurations
  69                                         $this->$key =& $CI->$key;
  70                                 }
  71                                 else
  72                                 {
  73                                         $this->$key = $CI->$key;
  74                                 }
  75                         }
  76                 }
  77         }
  78
  79 }
  80 // END Model Class
  81
  82 /* End of file Model.php */
  83 /* Location: ./system/libraries/Model.php */