Merged r12126 from trunk (#13008).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@12127 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/user_preference.rb

@@ -33,7 +33,7 @@ class UserPreference < ActiveRecord::Base
   end
 
   def [](attr_name)
-    if attribute_present? attr_name
+    if has_attribute? attr_name
       super
     else
       others ? others[attr_name] : nil
@@ -41,7 +41,7 @@ class UserPreference < ActiveRecord::Base
   end
 
   def []=(attr_name, value)
-    if attribute_present? attr_name
+    if has_attribute? attr_name
       super
     else
       h = (read_attribute(:others) || {}).dup