[FIX] website_sale: order products by sequence ascendant

Sequence is used everywhere as lowest first but was not in ecommerce.
Fixes #7263

addons/website_sale/controllers/main.py

@@ -221,7 +221,7 @@ class website_sale(http.Controller):
 
         product_count = product_obj.search_count(cr, uid, domain, context=context)
         pager = request.website.pager(url=url, total=product_count, page=page, step=ppg, scope=7, url_args=post)
-        product_ids = product_obj.search(cr, uid, domain, limit=ppg, offset=pager['offset'], order='website_published desc, website_sequence desc', context=context)
+        product_ids = product_obj.search(cr, uid, domain, limit=ppg, offset=pager['offset'], order='website_published desc, website_sequence asc', context=context)
         products = product_obj.browse(cr, uid, product_ids, context=context)
 
         attributes_obj = request.registry['product.attribute']

addons/website_sale/data/demo.xml

@@ -11,7 +11,7 @@
             <field name="website_published" eval="True"/>
             <field name="website_size_x">2</field>
             <field name="website_size_y">2</field>
-            <field name="website_sequence">5</field>
+            <field name="website_sequence">3</field>
             <field name="website_style_ids" eval="[(6,0,[ref('website_sale.image_full')])]"/>
             <field name="website_description" type="html">
                 <section class="mt16 mb16 oe_dark">

addons/website_sale/models/product.py

@@ -115,8 +115,8 @@ class product_template(osv.Model):
     }
 
     def _defaults_website_sequence(self, cr, uid, *l, **kwargs):
-        cr.execute('SELECT MAX(website_sequence)+1 FROM product_template')
-        next_sequence = cr.fetchone()[0] or 0
+        cr.execute('SELECT MIN(website_sequence)-1 FROM product_template')
+        next_sequence = cr.fetchone()[0] or 10
         return next_sequence
 
     _defaults = {

addons/website_sale_options/data/demo.xml

@@ -20,7 +20,7 @@
         <record id="product_product_1" model="product.product">
             <field name="name">Warranty</field>
             <field name="list_price">20.0</field>
-            <field name="website_sequence">-1</field>
+            <field name="website_sequence">100</field>
             <field name="website_published" eval="True"/>
             <field name="type">service</field>
             <field name="uom_id" ref="product.product_uom_unit"/>