rails--rails/activesupport/CHANGELOG.md

• Add SecureRandom::uuid_v3 and SecureRandom::uuid_v5 to support stable UUID fixtures on PostgreSQL.

  Roderick van Domburg

• Fixed ActiveSupport::Duration#eql? so that 1.second.eql?(1.second) is true.

  This fixes the current situation of:

  1.second.eql?(1.second) #=> false
  

  eql? also requires that the other object is an ActiveSupport::Duration. This requirement makes ActiveSupport::Duration's behavior consistent with the behavior of Ruby's numeric types:

  1.eql?(1.0) #=> false
  1.0.eql?(1) #=> false
  
  1.second.eql?(1) #=> false (was true)
  1.eql?(1.second) #=> false
  
  { 1 => "foo", 1.0 => "bar" }
  #=> { 1 => "foo", 1.0 => "bar" }
  
  { 1 => "foo", 1.second => "bar" }
  # now => { 1 => "foo", 1.second => "bar" }
  # was => { 1 => "bar" }
  

  And though the behavior of these hasn't changed, for reference:

  1 == 1.0 #=> true
  1.0 == 1 #=> true
  
  1 == 1.second #=> true
  1.second == 1 #=> true
  

  Emily Dobervich

• ActiveSupport::SafeBuffer#prepend acts like String#prepend and modifies instance in-place, returning self. ActiveSupport::SafeBuffer#prepend! is deprecated.

  Pavel Pravosud

• HashWithIndifferentAccess better respects #to_hash on objects it's given. In particular, .new, #update, #merge, #replace all accept objects which respond to #to_hash, even if those objects are not Hashes directly.

  Peter Jaros

• Deprecate Class#superclass_delegating_accessor, use Class#class_attribute instead.

  Akshay Vishnoi

• Ensure classes which include Enumerable get #to_json in addition to #as_json.

  Sammy Larbi

• Change the signature of fetch_multi to return a hash rather than an array. This makes it consistent with the output of read_multi.

  Parker Selbert

• Introduce Concern#class_methods as a sleek alternative to clunky module ClassMethods. Add Kernel#concern to define at the toplevel without chunky module Foo; extend ActiveSupport::Concern boilerplate.

  # app/models/concerns/authentication.rb
  concern :Authentication do
    included do
      after_create :generate_private_key
    end
  
    class_methods do
      def authenticate(credentials)
        # ...
      end
    end
  
    def generate_private_key
      # ...
    end
  end
  
  # app/models/user.rb
  class User < ActiveRecord::Base
    include Authentication
  end
  

  Jeremy Kemper

Please check 4-1-stable for previous changes.