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## Rails 4.0.0.beta1 (February 25, 2013) ##
* Add `ActiveModel::Validations::AbsenceValidator`, a validator to check the
absence of attributes.
class Person
include ActiveModel::Validations
attr_accessor :first_name
validates_absence_of :first_name
end
person = Person.new
person.first_name = "John"
person.valid?
# => false
person.errors.messages
# => {:first_name=>["must be blank"]}
*Roberto Vasquez Angel*
* `[attribute]_changed?` now returns `false` after a call to `reset_[attribute]!`.
*Renato Mascarenhas*
* Observers was extracted from Active Model as `rails-observers` gem.
*Rafael Mendonça França*
* Specify type of singular association during serialization.
*Steve Klabnik*
* Fixed length validator to correctly handle `nil`. Fixes #7180.
*Michal Zima*
* Removed dispensable `require` statements. Make sure to require `active_model` before requiring
individual parts of the framework.
*Yves Senn*
* Use BCrypt's `MIN_COST` in the test environment for speedier tests when using `has_secure_pasword`.
*Brian Cardarella + Jeremy Kemper + Trevor Turk*
* Add `ActiveModel::ForbiddenAttributesProtection`, a simple module to
protect attributes from mass assignment when non-permitted attributes are passed.
*DHH + Guillermo Iguaran*
* `ActiveModel::MassAssignmentSecurity` has been extracted from Active Model and the
`protected_attributes` gem should be added to Gemfile in order to use
`attr_accessible` and `attr_protected` macros in your models.
*Guillermo Iguaran*
* Due to a change in builder, `nil` and empty strings now generate
closed tags, so instead of this:
<pseudonyms nil=\"true\"></pseudonyms>
it generates this:
<pseudonyms nil=\"true\"/>
*Carlos Antonio da Silva*
* Inclusion/exclusion validators accept a method name passed as a symbol to the
`:in` option.
This allows to use dynamic inclusion/exclusion values using methods, besides
the current lambda/proc support.
*Gabriel Sobrinho*
* `ActiveModel::Validation#validates` ability to pass custom exception to the
`:strict` option.
*Bogdan Gusiev*
* Changed `ActiveModel::Serializers::Xml::Serializer#add_associations` to by default
propagate `:skip_types, :dasherize, :camelize` keys to included associations.
It can be overriden on each association by explicitly specifying the option on one
or more associations
*Anthony Alberto*
* Changed `ActiveModel::Serializers::JSON.include_root_in_json` default value to false.
Now, AM Serializers and AR objects have the same default behaviour. Fixes #6578.
class User < ActiveRecord::Base; end
class Person
include ActiveModel::Model
include ActiveModel::AttributeMethods
include ActiveModel::Serializers::JSON
attr_accessor :name, :age
def attributes
instance_values
end
end
user.as_json
=> {"id"=>1, "name"=>"Konata Izumi", "age"=>16, "awesome"=>true}
# root is not included
person.as_json
=> {"name"=>"Francesco", "age"=>22}
# root is not included
*Francesco Rodriguez*
* Passing false hash values to `validates` will no longer enable the corresponding validators.
*Steve Purcell*
* `ConfirmationValidator` error messages will attach to `:#{attribute}_confirmation` instead of `attribute`.
*Brian Cardarella*
* Added `ActiveModel::Model`, a mixin to make Ruby objects work with AP out of box.
*Guillermo Iguaran*
* `AM::Errors#to_json`: support `:full_messages` parameter.
*Bogdan Gusiev*
* Trim down Active Model API by removing `valid?` and `errors.full_messages`.
*José Valim*
* When `^` or `$` are used in the regular expression provided to `validates_format_of`
and the `:multiline` option is not set to true, an exception will be raised. This is
to prevent security vulnerabilities when using `validates_format_of`. The problem is
described in detail in the Rails security guide.
*Jan Berdajs + Egor Homakov*
Please check [3-2-stable](https://github.com/rails/rails/blob/3-2-stable/activemodel/CHANGELOG.md) for previous changes.
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