fixed problem with multiple carts and a whole load of problems with crazy delivery destination logic / if I didn't write it i would have thought it was written by a drug abuser during high

front-api/models/delivery_destination.rb

@@ -2,10 +2,13 @@ class DeliveryDestination < ActiveRecord::Base
   has_one :cart
   belongs_to :user
 
-  def self.find_or_create(anonymous_id, user_id)
+  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.create!({user_id: user_id, anonymous_id_string: anonymous_id })
-    return dd
+    dd ||= DeliveryDestination.new({user_id: user_id, anonymous_id_string: anonymous_id })
+    attributes = dd.as_json
+    attributes.delete("id")
+    result = DeliveryDestination.create!(attributes)
+    return result
   end
 end