// Comment useless line in order to clean this

// Add table and identifier to CartRule class

classes/Cart.php

@@ -321,7 +321,8 @@ class CartCore extends ObjectModel
 			$row['description'] = $row['name'];
 		}
 
-		$results = $this->getCartRule();
+		// TODO Clean the following line, this line generate bug because getCartRule method not exists
+		//$results = $this->getCartRule();
 
 		return $result;
 	}
@@ -825,7 +826,7 @@ class CartCore extends ObjectModel
 			/* Add product to the cart */
 			else
 			{
-				$sql = 'SELECT stock.out_of_stock, IFNULL(stock.quantity, 0)
+				$sql = 'SELECT stock.out_of_stock, IFNULL(stock.quantity, 0) as quantity
 						FROM '._DB_PREFIX_.'product p
 						'.Product::sqlStock('p', $id_product_attribute, true, $shop).'
 						WHERE p.id_product = '.$id_product;

classes/CartRule.php

@@ -62,6 +62,9 @@ class CartRuleCore extends ObjectModel
 		'identifier' => 'id_cart_rule',
 	);
 
+	protected $table = 'cart_rule';
+	protected $identifier = 'id_cart_rule';
+
  	protected $fieldsRequired = array('date_from', 'date_to');
  	protected $fieldsSize = array('code' => 254, 'description' => 65534);
  	protected $fieldsValidate = array(