Revert "Fixes bug in ActiveRecord::QueryMethods, #1697"

This reverts commit 0df27c98d9.

Reverted due to failing test, see #2845.

activerecord/lib/active_record/relation/query_methods.rb

@@ -305,8 +305,10 @@ module ActiveRecord
         when Arel::Nodes::Ordering
           o.reverse
         when String, Symbol
-          s = o.to_s.gsub(/\s((desc)|(asc))\s*(,|\Z)/i) { |m| " #{$2 ? 'ASC' : 'DESC'}#{$4}" }
-          s.match(/\s(de|a)sc\Z/i) ? s : s.concat(" DESC")
+          o.to_s.split(',').collect do |s|
+            s.strip!
+            s.gsub!(/\sasc\Z/i, ' DESC') || s.gsub!(/\sdesc\Z/i, ' ASC') || s.concat(' DESC')
+          end
         else
           o
         end

activerecord/test/cases/relations_test.rb

@@ -934,11 +934,6 @@ class RelationTest < ActiveRecord::TestCase
     assert_equal 'zyke', FastCar.order_using_old_style.limit(1).first.name
   end
 
-  def test_order_with_function_and_last
-    authors = Author.scoped
-    assert_equal authors(:bob), authors.order( "id asc, COALESCE( organization_id, owned_essay_id)" ).last
-  end
-  
   def test_order_using_scoping
     car1 = CoolCar.order('id DESC').scoping do
       CoolCar.find(:first, :order => 'id asc')