rails--rails/activesupport/CHANGELOG.md

• Support not to cache nil for ActiveSupport::Cache#fetch.

  cache.fetch('bar', skip_nil: true) { nil }
  cache.exist?('bar') # => false
  

  Martin Hong

• Add "event object" support to the notification system. Before this change, end users were forced to create hand made artisanal event objects on their own, like this:

  ActiveSupport::Notifications.subscribe('wait') do |*args|
    @event = ActiveSupport::Notifications::Event.new(*args)
  end
  
  ActiveSupport::Notifications.instrument('wait') do
    sleep 1
  end
  
  @event.duration # => 1000.138
  

  After this change, if the block passed to subscribe only takes one parameter, the framework will yield an event object to the block. Now end users are no longer required to make their own:

  ActiveSupport::Notifications.subscribe('wait') do |event|
    @event = event
  end
  
  ActiveSupport::Notifications.instrument('wait') do
    sleep 1
  end
  
  p @event.allocations # => 7
  p @event.cpu_time    # => 0.256
  p @event.idle_time   # => 1003.2399
  

  Now you can enjoy event objects without making them yourself. Neat!

  Aaron "t.lo" Patterson

• Add cpu_time, idle_time, and allocations to Event

  Eileen M. Uchitelle, Aaron Patterson

• RedisCacheStore: support key expiry in increment/decrement.

  Pass :expires_in to #increment and #decrement to set a Redis EXPIRE on the key.

  If the key is already set to expire, RedisCacheStore won't extend its expiry.

  Rails.cache.increment("some_key", 1, expires_in: 2.minutes)
  

  Jason Lee

• Allow Range#=== and Range#cover? on Range

  Range#cover? can now accept a range argument like Range#include? and Range#===. Range#=== works correctly on Ruby 2.6. Range#include? is moved into a new file, with these two methods.

  Requiring active_support/core_ext/range/include_range is now deprecated. Use require "active_support/core_ext/range/compare_range" instead.

  utilum

• Add index_with to Enumerable.

  Allows creating a hash from an enumerable with the value from a passed block or a default argument.

  %i( title body ).index_with { |attr| post.public_send(attr) }
  # => { title: "hey", body: "what's up?" }
  
  %i( title body ).index_with(nil)
  # => { title: nil, body: nil }
  

  Closely linked with index_by, which creates a hash where the keys are extracted from a block.

  Kasper Timm Hansen

• Fix bug where ActiveSupport::Timezone.all would fail when tzinfo data for any timezone defined in ActiveSupport::TimeZone::MAPPING is missing.

  Dominik Sander

• Redis cache store: delete_matched no longer blocks the Redis server. (Switches from evaled Lua to a batched SCAN + DEL loop.)

  Gleb Mazovetskiy

• Fix bug where ActiveSupport::Cache will massively inflate the storage size when compression is enabled (which is true by default). This patch does not attempt to repair existing data: please manually flush the cache to clear out the problematic entries.

  Godfrey Chan

• Fix bug where URI.unescape would fail with mixed Unicode/escaped character input:

  URI.unescape("\xe3\x83\x90")  # => "バ"
  URI.unescape("%E3%83%90")  # => "バ"
  URI.unescape("\xe3\x83\x90%E3%83%90")  # => Encoding::CompatibilityError
  

  Ashe Connor, Aaron Patterson

• Add before? and after? methods to Date, DateTime, Time, and TimeWithZone.

  Nick Holden

• ActiveSupport::Inflector#ordinal and ActiveSupport::Inflector#ordinalize now support translations through I18n.

  # locale/fr.rb
  
  {
    fr: {
      number: {
        nth: {
          ordinals: lambda do |_key, number:, **_options|
            if number.to_i.abs == 1
              'er'
            else
              'e'
            end
          end,
  
          ordinalized: lambda do |_key, number:, **_options|
            "#{number}#{ActiveSupport::Inflector.ordinal(number)}"
          end
        }
      }
    }
  }
  

  Christian Blais

• Add :private option to ActiveSupport's Module#delegate in order to delegate methods as private:

  class User < ActiveRecord::Base
    has_one :profile
    delegate :date_of_birth, to: :profile, private: true
  
    def age
      Date.today.year - date_of_birth.year
    end
  end
  
  # User.new.age  # => 29
  # User.new.date_of_birth
  # => NoMethodError: private method `date_of_birth' called for #<User:0x00000008221340>
  

  Tomas Valent

• String#truncate_bytes to truncate a string to a maximum bytesize without breaking multibyte characters or grapheme clusters like 👩‍👩‍👦‍👦.

  Jeremy Daer

• String#strip_heredoc preserves frozenness.

  "foo".freeze.strip_heredoc.frozen?  # => true
  

  Fixes that frozen string literals would inadvertently become unfrozen:

  # frozen_string_literal: true
  
  foo = <<-MSG.strip_heredoc
    la la la
  MSG
  
  foo.frozen?  # => false !??
  

  Jeremy Daer

• Rails 6 requires Ruby 2.4.1 or newer.

  Jeremy Daer

• Adds parallel testing to Rails.

  Parallelize your test suite with forked processes or threads.

  Eileen M. Uchitelle, Aaron Patterson

Please check 5-2-stable for previous changes.