fixed bugs with address in incognito and NaN in delivery costs and total

front-api/models/delivery_destination.rb

@@ -3,8 +3,8 @@ class DeliveryDestination < ActiveRecord::Base
   belongs_to :user
 
   def self.create_from_last(anonymous_id, user_id)
-    dd = DeliveryDestination.where(user_id: user_id).order("id desc").first
-    dd ||= DeliveryDestination.where(anonymous_id_string: anonymous_id).order("id desc").first
+    dd = DeliveryDestination.where(["user_id is not null and user_id = ?", user_id]).order("id desc").first
+    dd ||= DeliveryDestination.where(["anonymous_id_string is not null and anonymous_id_string = ?", anonymous_id]).order("id desc").first
     dd ||= DeliveryDestination.new({user_id: user_id, anonymous_id_string: anonymous_id })
     attributes = dd.as_json
     attributes.delete("id")