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*Rails 3.0.0 [beta 2] (pending)*
* #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]
* #to_key was added to ActiveModel::Lint so we can generate DOM IDs for
AMo objects with composite keys [MG]
*Rails 3.0.0 [beta 1] (February 4, 2010)*
* 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.class_eval 'def after_find() end' unless
* 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.
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