rails--rails/activemodel/CHANGELOG.md

Rails 4.0.0 (unreleased)

• 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 values. 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 values and empty strings now generates closed tags, so instead of this:

  <pseudonyms nil=\"true\"></pseudonyms>
  

  It generates this:

  <pseudonyms nil=\"true\"/>
  

  Carlos Antonio da Silva

• Changed inclusion and exclusion validators to accept a symbol for :in option.

  This allows to use dynamic inclusion/exclusion values using methods, besides the current lambda/proc support.

  Gabriel Sobrinho

• AM::Validation#validates ability to pass custom exception to :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 `AM::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 for previous changes.