rails/activesupport/CHANGELOG.md

• DateTime#to_f now preserves the fractional seconds instead of always rounding to .0.

  Fixes #15994.

  John Paul Ashenfelter

• Add Hash#transform_values to simplify a common pattern where the values of a hash must change, but the keys are left the same.

  Sean Griffin

• Always instrument ActiveSupport::Cache.

  Since ActiveSupport::Notifications only instrument items when there are subscriber we don't need to disable instrumentation.

  Peter Wagenet

• Make the apply_inflections method case-insensitive when checking whether a word is uncountable or not.

  Robin Dupret

• Make Dependencies pass a name to NameError error.

  arthurnn

• Fixed ActiveSupport::Cache::FileStore exploding with long paths.

  Adam Panzer / Michael Grosser

• Fixed ActiveSupport::TimeWithZone#- so precision is not unnecessarily lost when working with objects with a nanosecond component.

  ActiveSupport::TimeWithZone#- should return the same result as if we were using Time#-:

  Time.now.end_of_day - Time.now.beginning_of_day #=> 86399.999999999
  

  Before:

  Time.zone.now.end_of_day.nsec #=> 999999999
  Time.zone.now.end_of_day - Time.zone.now.beginning_of_day #=> 86400.0
  

  After:

  Time.zone.now.end_of_day - Time.zone.now.beginning_of_day
  #=> 86399.999999999
  

  Gordon Chan

• Fixed precision error in NumberHelper when using Rationals.

  Before:

  ActiveSupport::NumberHelper.number_to_rounded Rational(1000, 3), precision: 2
  #=> "330.00"
  

  After:

  ActiveSupport::NumberHelper.number_to_rounded Rational(1000, 3), precision: 2
  #=> "333.33"
  

  See #15379.

  Juanjo Bazán

• Removed deprecated Numeric#ago and friends

  Replacements:

  5.ago   => 5.seconds.ago
  5.until => 5.seconds.until
  5.since => 5.seconds.since
  5.from_now => 5.seconds.from_now
  

  See #12389 for the history and rationale behind this.

  Godfrey Chan

• DateTime advance now supports partial days.

  Before:

  DateTime.now.advance(days: 1, hours: 12)
  

  After:

  DateTime.now.advance(days: 1.5)
  

  Fixes #12005.

  Shay Davidson

• Hash#deep_transform_keys and Hash#deep_transform_keys! now transform hashes in nested arrays. This change also applies to Hash#deep_stringify_keys, Hash#deep_stringify_keys!, Hash#deep_symbolize_keys and Hash#deep_symbolize_keys!.

  OZAWA Sakuro

• Fixed confusing DelegationError in Module#delegate.

  See #15186.

  Vladimir Yarotsky

• Fixed ActiveSupport::Subscriber so that no duplicate subscriber is created when a subscriber method is redefined.

  Dennis Schön

• Remove deprecated string based terminators for ActiveSupport::Callbacks.

  Eileen M. Uchitelle

• Fixed an issue when using ActiveSupport::NumberHelper::NumberToDelimitedConverter to convert a value that is an ActiveSupport::SafeBuffer introduced in 2da9d67.

  See #15064.

  Mark J. Titorenko

• TimeZone#parse defaults the day of the month to '1' if any other date components are specified. This is more consistent with the behavior of Time#parse.

  Ulysse Carion

• humanize strips leading underscores, if any.

  Before:

  '_id'.humanize # => ""
  

  After:

  '_id'.humanize # => "Id"
  

  Xavier Noria

• Fixed backward compatibility isues introduced in 326e652.

  Empty Hash or Array should not present in serialization result.

  {a: []}.to_query # => ""
  {a: {}}.to_query # => ""
  

  For more info see #14948.

  Bogdan Gusiev

• 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.