probleme formulaire AJAX

[massi4]

salut

 

j'ai un formulaire dans mon module en back office.

j'ai 2 balise select et je voudrais que le 2^eme  select affiche des valeurs en fonction du 1^er select

 

voici mon fichier qui devrait envoyer et recevoire les donnees

adminvitrine.php

<?php

//die();
//include(_PS_ROOT_DIR_.'\init.php');
//include(_PS_ROOT_DIR_.'\config\config.inc.php');
class AdminVitrineController extends ModuleAdminController {

    public function __construct() {
        $this->bootstrap = true;
        parent::__construct();
       
	
    }

	public function initContent()
	{   if (!defined('_PS_ADMIN_DIR_'))
		define('_PS_ADMIN_DIR_', getcwd());
		//echo getcwd();
		//include(_PS_ADMIN_DIR_.'/../config/config.inc.php');
		/* Getting cookie or logout */
		//require_once(_PS_ADMIN_DIR_.'/init.php');
	   $products_partials = Product::getProducts(1, 0, 0, 'id_product', 'DESC' );
	   $adhesif = AdhesifModel::findAll();
	   //$subcategoryImages = SubCategoryImagesModel::findAll();
	   $Images = ImageModel::findAll();
	   $subcategory = SubCategoryModel::findAll();
       $products = Product::getProductsProperties(1, $products_partials);
        foreach ($products as $key => $product) {          
            $cover = Product::getCover($product['id_product']);
            $products[$key]["id_image"] = $cover["id_image"];     

        }
        $json = array();
	    if(tools::getValue('q')) {
	    $id = htmlentities(intval(tools::getValue('q')));
	    // requête qui récupère les images selon la sous categorie
	    $json = SubCategoryImagesModel::find($id);
	    $this->context->smarty->assign('subcategoryImages',$json);
	    echo json_encode($json);
	    }
		$this->context->smarty->assign('products',$products);
		$this->context->smarty->assign('adhesifs',$adhesif);
		//$this->context->smarty->assign('subcategoryImages',$subcategoryImages);
		$this->context->smarty->assign('subcategories',$subcategory);
		$this->context->smarty->assign('img','http://localhost/prestashop/img/vitrine/');
	 parent::initContent();
	}

}

et voici le ficjier JS

 $subcategory.on('change', function() {
        var val = $(this).val(); // on récupère la valeur des souscategories
        if(val != '') {
            $image.empty(); // on vide la liste des images
             alert(val);
            $.ajax({
                url: 'http://localhost/prestashop/modules/vitrine/controllers/admin/adminvitrine.php',
                data: 'id_subcategory='+ val, // on envoie $_GET['id_subcategory']
                dataType: 'json',
                success: function(json) {
                    $.each(json, function(index, value) {
                        $image.append('<option value="'+ index +'">'+ value +'</option>');
                    });
                }
            });
        }
    });

merci