Product->tax_rate ne marche pas

[agarmur]

Bonjour, 

je suis créer un webservice pour pouvoir créer des produits, je chercher un moyen de mettre une tax par rapport à un nombre données, dans un produit il y a une fonction tax_rate, quand je l'implémente $product->tax_rate = 10; et que par la suite je echo $product->getTaxesRate();

Il me renvoie : 0

 

Voici mon code complet : 

$xml = simplexml_load_file('php://input');
$product = new Product($xml->id);
$product->category = [2, 3];
$product->id_category_default = (int)$xml->id_category_default;
$product->name = $xml->name;
$product->price = $xml->price; //prix
$product->unit_price = $xml->unit_price; //prix unitaire
$product->wholesale_price = $xml->wholesale_price; //prix de gros
$product->ecotax = $xml->ecotax;
$product->ean13 = $xml->ean13; //code barre

$product->tax_rate = 30;

$product->description = html_entity_decode($xml->description);
$product->description_short = html_entity_decode($xml->description_short);
$product->reference = $xml->reference;
$product->weight = $xml->weight; //poids
$product->height = $xml->height; //hauteur
$product->width = $xml->width; //largeur
$product->depth = $xml->depth; //profondeur
$product->minimal_quantity = (int)$xml->minimal_quantity; // quantité minimal
$product->available_date = $xml->available_date;
$product->delivery_in_stock = $xml->delivery_in_stock;
$product->delivery_out_stock = $xml->delivery_out_stock;
$product->additional_shipping_cost = $xml->shipping_cost;
$product->id_manufacturer = 1;
$product->manufacturer_name = $xml->manufacturer_name;
$product->indexed = 1;
$product->redirect_type = '301';
$product->active = true;
if ($xml->online_only == "true") {
$product->online_only = true;
} else {
$product->online_only = false;
}
if ($xml->available_for_order == "true") {
$product->available_for_order = true;
} else {
$product->available_for_order = false;
}
if ($xml->show_price == "true") {
$product->show_price = true;
} else {
$product->show_price = false;
}
$product->save();
$product->updateCategories($product->category);
// STOCK
$e = $product->getDefaultIdProductAttribute();
StockAvailable::setQuantity($product->id, $e, $xml->quantity);
//IMAGE
$nb = count($xml->urlImage) - 1;
$i = 0;
$a = 1;
while ($i <= $nb) {
  $image = new Image();
  $image->id_product = $product->id;
  $image->position = Image::getHighestPosition($product->id) + $a++;
  if ($i >= 1) {
  $image->cover = false;
  } else {
  $image->cover = true;
  }
  $image->image_format = 'jpg';
  $image->save();
  $this->copyImg((int)$product->id, (int)$image->id, ($xml->urlImage[$i++]), 'products', false);
  }
  //SET CARRIER
  Db::getInstance()->execute('INSERT INTO `ps_product_carrier` (`id_product`, `id_carrier_reference`, `id_shop`) VALUES (' . $product->id . ', ' . $xml->idCarrier . ', ' . (int)Context::getContext()->shop->id . ');');


  echo $product->getTaxesRate();

Merci d'avance !