patch.diff

diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index a22849f..021c50d 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -1030,13 +1030,14 @@ module ActiveRecord
       arel.order(*orders) unless orders.empty?
     end

-    VALID_DIRECTIONS = [:asc, :desc, 'asc', 'desc'] # :nodoc:
+    VALID_DIRECTIONS = [:asc, :desc, :ASC, :DESC,
+                        'asc', 'desc', 'ASC', 'DESC'] # :nodoc:

     def validate_order_args(args)
       args.grep(Hash) do |h|
-        h.values.map(&:downcase).each do |value|
+        h.values.each do |value|
           raise ArgumentError, "Direction '#{value}' is invalid. Valid " \
-                               "directions are asc and desc." unless VALID_DIRECTIONS.include?(value)
+                               "directions are: #{VALID_DIRECTIONS.inspect}" unless VALID_DIRECTIONS.include?(value)
         end
       end
     end