commerce: update session after modifying shopping cart content

when using a RAM cache for session, we can modify the temp objects directly
and the changes are kept, because the same object kept in RAM is accessed by
subsequent requests, but when using memcached every request get a different
object, so we need to put back the object in the session so that the new
version is saved in cache, so that subsequent requests use the modified object

bt5/erp5_advanced_ecommerce/SkinTemplateItem/portal_skins/erp5_advanced_ecommerce/Resource_addToShoppingCart.py

@@ -88,6 +88,9 @@ if not line_found:
     method_id(category)
   order_line.setPrice(context.getPrice(supply_path_type=["Sale Supply Line", "Sale Supply Cell"], context=order_line))
 context.WebSection_updateShoppingCartTradeCondition(shopping_cart, None)
+
+context.getPortalObject().portal_sessions[session_id].update(shopping_cart=shopping_cart)
+
 if checkout:
   website = context.getWebSiteValue()
   if website is not None:

bt5/erp5_advanced_ecommerce/SkinTemplateItem/portal_skins/erp5_advanced_ecommerce/WebSection_editShoppingCart.py

@@ -7,7 +7,8 @@
   - use Base_edit and a real ERP5 Form in order to  benefit from
     field reusability and property validation
 """
-translateString = context.Base_translateString 
+portal = context.getPortalObject()
+translateString = portal.Base_translateString 
 if field_my_buy_quantity is None:
   field_my_buy_quantity = context.REQUEST.get("field_my_buy_quantity", None)
 
@@ -44,7 +45,7 @@ if field_my_shipping_method not in ['', None]:
   line = getattr(shopping_cart, 'shipping_method', None)
   if line is not None:
     shopping_cart.manage_delObjects(line.getId())
-  shipping = context.getPortalObject().restrictedTraverse(field_my_shipping_method)
+  shipping = portal.restrictedTraverse(field_my_shipping_method)
   # create new shipping method order line
   shopping_cart.newContent(
                  id='shipping_method', 
@@ -58,6 +59,8 @@ if field_my_comment is not None:
 
 context.WebSection_updateShoppingCartTradeCondition(shopping_cart, field_my_payment_mode, preserve=True)
 
+portal.portal_sessions[container.REQUEST['session_id']].update(shopping_cart=shopping_cart)
+
 if redirect:
   # Hardcode redirection.
   return context.Base_redirect("WebSection_viewShoppingCart", \

bt5/erp5_advanced_ecommerce/SkinTemplateItem/portal_skins/erp5_advanced_ecommerce/WebSection_updateShoppingCartTradeCondition.py

 """
   Update Trade Condition with the appropriated Trade Condition.
 """
+portal = context.getPortalObject()
 if payment_mode is None and preserve:
   current_trade_condition = shopping_cart.getSpecialiseValue()
   if current_trade_condition is not None:
@@ -16,7 +17,7 @@ if context.REQUEST.get("loyalty_reward", "") == "enable" and context.getSiteLoya
 
 if payment_mode:
   reference = '%s_%s' % (reference, payment_mode.lower())
-sale_trade_condition = context.portal_catalog.getResultValue(
+sale_trade_condition = portal.portal_catalog.getResultValue(
   portal_type='Sale Trade Condition',
   reference='%' + reference + '%',
   validation_state='published',
@@ -27,3 +28,6 @@ if sale_trade_condition:
   shopping_cart.setSpecialiseValue(sale_trade_condition.getObject())
 else:
   shopping_cart.setSpecialise(context.WebSection_getDefaultTradeCondition())
+
+
+portal.portal_sessions[container.REQUEST['session_id']].update(shopping_cart=shopping_cart)

bt5/erp5_advanced_ecommerce/SkinTemplateItem/portal_skins/erp5_advanced_ecommerce/WebSite_createWebSiteAccount.py

@@ -71,6 +71,7 @@ else:
 shopping_cart = context.SaleOrder_getShoppingCart()
 if shopping_cart is not None:
   shopping_cart.manage_setLocalRoles(user_id, ['Owner'])
+  portal.portal_sessions[container.REQUEST['session_id']].update(shopping_cart=shopping_cart)
 
 """
 response = context.REQUEST.RESPONSE

bt5/erp5_commerce/SkinTemplateItem/portal_skins/erp5_commerce/Resource_addToShoppingCart.py

@@ -43,12 +43,14 @@ for order_line in shopping_cart_items:
     line_found=True
     break
 
-if line_found == False:
+if not line_found:
   ## new Resource so add it to shopping cart
   order_line = shopping_cart.newContent(portal_type='Sale Order Line')
   order_line.setResource(resource.getRelativeUrl())
   order_line.setQuantity(quantity)
 
+context.getPortalObject().portal_sessions[request['session_id']].update(shopping_cart=shopping_cart)
+
 if( context.getPortalType() == 'Product'):
   context.Base_redirect('Resource_viewAsShop',
                       keep_items={'portal_status_message':context.Base_translateString("Added to cart.")})

bt5/erp5_commerce/SkinTemplateItem/portal_skins/erp5_commerce/SaleOrder_deleteShoppingCartItem.py

 """
   Delete a shopping cart item.
 """
-
-translateString = context.Base_translateString
+portal = context.getPortalObject()
+translateString = portal.Base_translateString
 shopping_cart = context.SaleOrder_getShoppingCart()
 
 if field_my_order_line_id is not None:
@@ -11,5 +11,6 @@ if field_my_order_line_id is not None:
 else:
   portal_status_message = "Please select an item."
 
+portal.portal_sessions[container.REQUEST['session_id']].update(shopping_cart=shopping_cart)
 context.Base_redirect(form_id, \
                       keep_items={'portal_status_message': translateString(portal_status_message, mapping={})})