Added ActiveRecord::Base#last_modified to work with the new fresh_when/stale? conditional get methods from Action Pack

2 files changed, 8 insertions, 0 deletions

diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index f798b03ea1..d39418cd87 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## Rails 3.2.0 (unreleased) ##
 
+*   Added ActiveRecord::Base#last_modified to work with the new fresh_when/stale? conditional get methods from Action Pack *DHH*
 
 *   Implemented ActiveRecord::Relation#pluck method
 
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 76aa121ade..bae2dc738e 100644
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -1702,6 +1702,13 @@ MSG
         end
       end
 
+      # By default returns the value of the updated_at attribute, but can be overwritten to 
+      # provide another indicator of when this record was last updated. This is used by
+      # ActionControllers conditional get fresh_when/stale? methods.
+      def last_modified
+        self[:updated_at]
+      end
+
       def quoted_id #:nodoc:
         quote_value(id, column_for_attribute(self.class.primary_key))
       end