erp5_advanced_ecommerce: fix price issue and display always variation lower price

bt5/erp5_advanced_ecommerce/SkinTemplateItem/portal_skins/erp5_advanced_ecommerce/Resource_getWebShopImageURL.py

@@ -16,18 +16,26 @@ else:
   default_image = context.getDefaultImageValue()
 
 if default_image is not None:
-  # if current product has image, consider that it has no variation
-  return default_image.absolute_url()
+  #xxxx if current product has image, consider that it has no variation
+  if len([x for x in context.contentValues(portal_type='Product Individual Variation') if x.getVisibilityState() == "visible" ]) == 0:
+    return default_image.absolute_url()
 
 def getAvailableVariation(individual_variation_list):
+  price = None
+  default = context.REQUEST.get('variation', None)
   for individual_variation in individual_variation_list:
-    return individual_variation
+    context.REQUEST.set("variation", individual_variation.getRelativeUrl())
+    tmp = context.Resource_getShopPrice()
+    if price == None or price > tmp:
+      price = tmp
+      min_individual_variation = individual_variation
+
+  context.REQUEST.set("variation", default)
+  return min_individual_variation
     #if context.Resource_getInventoryStatus(variation=individual_variation.getRelativeUrl()) in ("STOCK", "AVAILABLE"):
     #  return individual_variation
-  return None
 
 individual_variation_list = [x for x in context.contentValues(portal_type='Product Individual Variation') if x.getVisibilityState() == "visible" ]
-random.shuffle(individual_variation_list)
 individual_variation = getAvailableVariation(individual_variation_list)
 if individual_variation:
   if image_id: