From 1bd44e1106d02812aa8866ddc2835ac0f4ee200f Mon Sep 17 00:00:00 2001
From: rde <rde@odoo.com>
Date: Tue, 31 Oct 2017 17:57:38 +0100
Subject: [PATCH] [FIX] website_sale_coupon: update reward line total when
 changing product qty on cart

  - Add a product (imac 1.799$) and a promo code (eg: 10%) in your cart
  - Go to checkout (/shop/cart). You now see 1,619.10 Total and 179.90 discount
  - Change product qty (eg: 2)
  - Subtotal is now 2x 1.799 - 179.90 instead of 2x 1.799 - 2x 179.90
  - Reward line total (discount) is still the same amount (10% on 1 ipad)

Now, we will recompute the discount price based on the entire cart

Note: This behavior was wanted and comes from this commit #87d542
But for the shop, we need to have the reward line being updated on the fly or
it wont make sense for the end user.

This closes #ee4be7a532dd707a0cd19c766dc8e8537dcda242
---
 controllers/main.py |  6 ++++++
 models/__init__.py  |  3 ++-
 models/website.py   | 12 ++++++++++++
 3 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 models/website.py

diff --git a/controllers/main.py b/controllers/main.py
index 3a589ac2979..c818db4640f 100644
--- a/controllers/main.py
+++ b/controllers/main.py
@@ -19,3 +19,9 @@ class WebsiteSale(WebsiteSale):
         order = request.website.sale_get_order()
         order.recompute_coupon_lines()
         return super(WebsiteSale, self).payment(**post)
+
+    @http.route(['/shop/cart'], type='http', auth="public", website=True)
+    def cart(self, **post):
+        order = request.website.sale_get_order()
+        order.recompute_coupon_lines()
+        return super(WebsiteSale, self).cart(**post)
diff --git a/models/__init__.py b/models/__init__.py
index bdc919f5eec..1cc49f34af5 100644
--- a/models/__init__.py
+++ b/models/__init__.py
@@ -2,4 +2,5 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 import sale_coupon_rule
-import sale_order
\ No newline at end of file
+import sale_order
+import website
diff --git a/models/website.py b/models/website.py
new file mode 100644
index 00000000000..37f93c7f64b
--- /dev/null
+++ b/models/website.py
@@ -0,0 +1,12 @@
+# -*- coding: utf-8 -*-
+from odoo import models, fields, api
+
+
+class Website(models.Model):
+    _inherit = "website"
+
+    @api.multi
+    def sale_get_order(self, force_create=False, code=None, update_pricelist=False, force_pricelist=False):
+        order = super(Website, self).sale_get_order(force_create, code, update_pricelist, force_pricelist)
+        order.recompute_coupon_lines()
+        return order