## Rails 3.0.20 (unreleased)

* Fix XML serialization of methods that return nil to not be considered as YAML (GH #8853 and GH #492)

## Rails 3.0.19 (Jan 8, 2013)

* No changes.

## Rails 3.0.18 (Jan 2, 2013)

* No changes.

## Rails 3.0.17 (Aug 9, 2012)

* No changes.

## Rails 3.0.16 (Jul 26, 2012)

* No changes.

## Rails 3.0.14 (Jun 12, 2012)

* No changes.

*Rails 3.0.13 (May 31, 2012)*

* No changes.

*Rails 3.0.10 (August 16, 2011)*

*No changes.


*Rails 3.0.9 (June 16, 2011)*

*No changes.


*Rails 3.0.8 (June 7, 2011)*

*No changes.


*Rails 3.0.7 (April 18, 2011)*

*No changes.


*Rails 3.0.6 (April 5, 2011)

* Fix when database column name has some symbolic characters (e.g. Oracle CASE# VARCHAR2(20)) #5818 #6850 [Robert Pankowecki, Santiago Pastorino]

* Fix length validation for fixnums #6556 [Andriy Tyurnikov]

* Fix i18n key collision with namespaced models #6448 [yves.senn]


*Rails 3.0.5 (February 26, 2011)*

* No changes.


*Rails 3.0.4 (February 8, 2011)*

* No changes.


*Rails 3.0.3 (November 16, 2010)*

* No changes.


*Rails 3.0.2 (November 15, 2010)*

* No changes.


*Rails 3.0.1 (October 15, 2010)*

* No changes.


*Rails 3.0.0 (August 29, 2010)*

* Added ActiveModel::MassAssignmentSecurity [Eric Chapweske, Josh Kalderimis]

* JSON supports a custom root option: to_json(:root => 'custom')  #4515 [Jatinder Singh]

* #new_record? and #destroyed? were removed from ActiveModel::Lint. Use
  persisted? instead. A model is persisted if it's not a new_record? and it was
  not destroyed? [MG]

* Added validations reflection in ActiveModel::Validations [JV]

    Model.validators
    Model.validators_on(:field)

* #to_key was added to ActiveModel::Lint so we can generate DOM IDs for
  AMo objects with composite keys [MG]

* ActiveModel::Observer#add_observer!

  It has a custom hook to define after_find that should really be in a
  ActiveRecord::Observer subclass:

      def add_observer!(klass)
        klass.add_observer(self)
        klass.class_eval 'def after_find() end' unless klass.respond_to?(:after_find)
      end

* Change the ActiveModel::Base.include_root_in_json default to true for Rails 3 [DHH]

* Add validates_format_of :without => /regexp/ option. #430 [Elliot Winkler, Peer Allan]

  Example :

      validates_format_of :subdomain, :without => /www|admin|mail/

* Introduce validates_with to encapsulate attribute validations in a class.  #2630 [Jeff Dean]

* Extracted from Active Record and Active Resource.