[FIX] website_sale: discount display in e-commerce

Each time the quantity of a product is changed, the price must
be updated according to the pricelist of the user.
When the price given by the pricelist is less then the unit price
of the product, the reduction of the price must be displayed.

opw:660178

addons/website_sale/models/sale_order.py

@@ -3,6 +3,7 @@ import random
 import openerp
 
 from openerp import SUPERUSER_ID, tools
+import openerp.addons.decimal_precision as dp
 from openerp.osv import osv, orm, fields
 from openerp.addons.web.http import request
 from openerp.tools.translate import _
@@ -119,6 +120,19 @@ class sale_order(osv.Model):
             product_ids = random.sample(s, min(len(s), 3))
             return self.pool['product.product'].browse(cr, uid, product_ids, context=context)
 
+class sale_order_line(osv.Model):
+    _inherit = "sale.order.line"
+
+    def _fnct_get_discounted_price(self, cr, uid, ids, field_name, args, context=None):
+        res = dict.fromkeys(ids, False)
+        for line in self.browse(cr, uid, ids, context=context):
+            res[line.id] = (line.price_unit * (1.0 - (line.discount or 0.0) / 100.0))
+        return res
+
+    _columns = {
+        'discounted_price': fields.function(_fnct_get_discounted_price, string='Discounted price', type='float', digits_compute=dp.get_precision('Product Price')),
+    }
+
 
 class website(orm.Model):
     _inherit = 'website'

addons/website_sale/static/src/js/website_sale.js

@@ -101,12 +101,12 @@ $('.oe_website_sale').each(function () {
 
     $(oe_website_sale).on("change", 'input[name="add_qty"]', function (event) {
         var product_ids = [];
-        var product_dom = $(".js_add_cart_variants[data-attribute_value_ids]").first();
+        var product_dom = $(".js_add_cart_variants[data-attribute_value_ids]").last();
         if (!product_dom.length) {
             return;
         }
         _.each(product_dom.data("attribute_value_ids"), function(entry) {
-            product_ids.push(entry);});
+            product_ids.push(entry[0]);});
         var qty = $(event.target).closest('form').find('input[name="add_qty"]').val();
 
         if ($("#product_detail").length) {

addons/website_sale/views/templates.xml

@@ -448,6 +448,10 @@
 <template id="product_variants" inherit_id="website_sale.product" active="False" customize_show="True" name="List View of Variants">
   <xpath expr="//t[@t-placeholder='select']" position="replace">
     <input type="hidden" t-if="len(product.product_variant_ids) == 1" name="product_id" t-att-value="product.product_variant_ids[0].id"/>
+    <t t-debug="pudb"/>
+    <t t-call="website_sale.variants">
+      <t t-set="ul_class" t-value="'nav-stacked'"/>
+    </t>
     <t t-if="len(product.product_variant_ids) &gt; 1">
       <label label-default="label-default" class="radio" t-foreach="product.product_variant_ids" t-as="variant_id">
         <input type="radio" name="product_id" class="js_product_change" t-att-checked="'checked' if variant_id_index == 0 else ''" t-att-value="variant_id.id" t-att-data-lst_price="variant_id.lst_price" t-att-data-price="variant_id.price"/>
@@ -772,13 +776,13 @@
                   </div>
               </td>
               <td class="text-center" id="td-price" name="price">
-                  <del t-attf-class="text-danger #{'' if (compute_currency(line.product_id.lst_price) - line.price_unit) &gt; 0.1 else 'hidden'}" style="text-decoration: line-through; white-space: nowrap;"
+                  <del t-attf-class="text-danger #{'' if line.product_id.lst_price &gt; line.discounted_price else 'hidden'}" style="text-decoration: line-through; white-space: nowrap;"
                     t-field="line.product_id.lst_price" t-field-options='{
                         "widget": "monetary",
                         "from_currency": "line.company_id.currency_id",
                         "display_currency": "website.currency_id"
                     }'/>
-                <span t-field="line.price_unit" style="white-space: nowrap;" t-field-options='{
+                <span t-field="line.discounted_price" style="white-space: nowrap;" t-field-options='{
                      "widget": "monetary",
                      "display_currency": "website.currency_id"
                  }'/>