Zend FR

CREATE TABLE IF NOT EXISTS `admin` (
  `id_user` int(11) NOT NULL AUTO_INCREMENT,
  `nom` varchar(50) NOT NULL,
  `droit` tinyint(3) unsigned NOT NULL,
  PRIMARY KEY (`id_user`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=12 ;

CREATE TABLE IF NOT EXISTS `image` (
  `id_image` int(11) NOT NULL AUTO_INCREMENT,
  `id_user` int(11) NOT NULL,
  `url` varchar(10) NOT NULL,
  PRIMARY KEY (`id_image`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=3 ;

class Application_Model_DbTable_Image extends Zend_Db_Table_Abstract
{

    protected $_name = 'image';
    protected $_primary = array('id_image');
    /*
     *  Références (FK)
     */
 
    protected $_referenceMap = array(  //// Référence à la table "Admin"
                                       'Admin' => array( 
                                            'columns' => 'id_user',
                                            'refTableClass' => 'Application_Model_Table_DbTable_Admin',
                                            'refColumns' => 'id_user' )
                                                );
}

<?php

class IndexController extends Zend_Controller_Action {
    public function init() {
        /* Initialize action controller here */
    }
    public function indexAction() {
        $table = new Application_Model_DbTable_Admin();
        $users = $table->fetchAll();
        
        foreach ($users as $user) {
            echo $user->url;//on lit le champ url de la table image
        }
    }
}

class IndexController extends Zend_Controller_Action {
    public function init() {
        /* Initialize action controller here */
    }
    public function indexAction() {
        $table = new Application_Model_DbTable_Admin();
        $users = $table->fetchAll();
        
        foreach ($users as $user) {
            echo $user->nom;//on lit le champ nom de la table admin
        }
    }
}

An error occurred
Application error