Monkey patch a prepend_order method

app/models/card/golden.rb

@@ -6,12 +6,7 @@ module Card::Golden
 
     has_one :goldness, dependent: :destroy, class_name: "Card::Goldness"
 
-    scope :with_golden_first, -> do
+    scope :with_golden_first, -> { left_outer_joins(:goldness).prepend_order("card_goldnesses.id IS NULL") }
-      left_outer_joins(:goldness).tap do |relation|
-        # Make sure it can be layered in with other orderings taking precedence.
-        relation.order_values.unshift("card_goldnesses.id IS NULL")
-      end
-    end
   end
 
   def golden?

lib/rails_ext/prepend_order.rb

@@ -0,0 +1,16 @@
+module ActiveRecordRelationPrependOrder
+  extend ActiveSupport::Concern
+
+  included do
+    def prepend_order(*args)
+      new_orders = args.flatten.map { |arg| arg.is_a?(String) ? arg : arg.to_sql }
+
+      spawn.tap do |relation|
+        relation.order_values = new_orders + order_values
+      end
+    end
+  end
+end
+
+ActiveRecord::Relation.include(ActiveRecordRelationPrependOrder)
+ActiveRecord::AssociationRelation.include(ActiveRecordRelationPrependOrder)