root/trunk/app/models/share.php

<?php
/**  
*  Chipotle Software 2002-2008  GPLv3 
*  @version 0.3
**/

class Share extends AppModel {
 
 public $belongsTo = array('User' =>
                   array('className'  => 'User',
                         'conditions' => '',
                     'order'      => '',
                     'fields'     =>'id, username',
                     'foreignKey' => 'user_id'
                     ),
                   'Subject' =>
               array('className'  => 'Subject',
                         'conditions' => '',
                     'order'      => null,
                 'foreignKey' => 'subject_id'
                         )
                      );

 public $validate = array(
  'file' => array(
                    'rule'       => array('minLength', 4),
                    'message'    => 'File must be at least four characters long',
            'allowEmpty' => false,
                    'required'   => true 
            ),
  'description' => array(
                    'rule'       => array('minLength', 8),
                    'message'    => 'Description must be at least 8 characters long',
            'allowEmpty' => false,
                    'required'   => true 
            ),
  'user_id' => array(
             'rule'       => 'numeric',
                     'allowEmpty' => false,
                     'on' => 'create', // but not on update
                     'required'   => true 
             )
   );
 
}
?>