[13.0] [IMP] website_product_pack: For packs line with discount non u…

…pdate prices.

website_product_pack/models/sale_order.py

@@ -13,11 +13,19 @@ def _cart_update(
         self, product_id=None,
             line_id=None, add_qty=0, set_qty=0, **kwargs):
         sale_order_line = self.env['sale.order.line'].browse(line_id)
+        # If the line product pack has discount, non update prices fot this line.
+        pack_line_with_discount = sale_order_line.pack_parent_line_id and \
+            sale_order_line.pack_parent_line_id.product_id.pack_line_ids.filtered(
+                lambda x: x.product_id == sale_order_line.product_id and x.sale_discount)
         if sale_order_line.pack_parent_line_id and not \
-           sale_order_line.pack_parent_line_id.product_id.pack_modifiable:
-            return {
-                'line_id': line_id,
-                'quantity': sale_order_line.product_uom_qty}
+           sale_order_line.pack_parent_line_id.product_id.pack_modifiable or pack_line_with_discount:
+            quantity = sale_order_line.product_uom_qty
+            if sale_order_line.pack_parent_line_id.product_id.pack_modifiable:
+                if set_qty:
+                    quantity = set_qty
+                elif add_qty is not None:
+                    quantity += (add_qty or 0)
+            return {'line_id': line_id, 'quantity': quantity}
         # we force to remove the packs lines when the partent line is removed from the order.
         if not self._context.get('update_pricelist', False) and set_qty == 0 and sale_order_line.pack_child_line_ids:
             sale_order_line.pack_child_line_ids.unlink()