This patch changes update_attribute implementatino so:

- it will only save the attribute it has been asked to save and not all dirty attributes

- it does not invoke callbacks

- it does change updated_at/on

Signed-off-by: José Valim <jose.valim@gmail.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/activerecord/lib/active_record/timestamp.rb b/activerecord/lib/active_record/timestamp.rb
index da8324ddcc..e6d52744df 100644
--- a/activerecord/lib/active_record/timestamp.rb
+++ b/activerecord/lib/active_record/timestamp.rb
@@ -58,14 +58,22 @@ module ActiveRecord
     end
 
     def update(*args) #:nodoc:
-      if record_timestamps && (!partial_updates? || changed?)
+      record_update_timestamps
+      super
+    end
+
+    def record_update_timestamps
+      if should_record_update_timestamps
         current_time = current_time_from_proper_timezone
         timestamp_attributes_for_update_in_model.each { |column| write_attribute(column.to_s, current_time) }
       end
+    end
 
-      super
+    def should_record_update_timestamps
+      record_timestamps && (!partial_updates? || changed?)
     end
 
+
     def timestamp_attributes_for_update #:nodoc:
       [:updated_at, :updated_on]
     end