rails/activesupport/CHANGELOG.md

• Add default option to class_attribute. Before:

  class_attribute :settings self.settings = {}

  Now:

  class_attribute :settings, default: {}

  DHH

• #singularize and #pluralize now respect uncountables for the specified locale.

  Eilis Hamilton

• Add ActiveSupport::CurrentAttributes to provide a thread-isolated attributes singleton. Primary use case is keeping all the per-request attributes easily available to the whole system.

  DHH

• Fix implicit coercion calculations with scalars and durations

  Previously calculations where the scalar is first would be converted to a duration of seconds but this causes issues with dates being converted to times, e.g:

  Time.zone = "Beijing"           # => Asia/Shanghai
  date = Date.civil(2017, 5, 20)  # => Mon, 20 May 2017
  2 * 1.day                       # => 172800 seconds
  date + 2 * 1.day                # => Mon, 22 May 2017 00:00:00 CST +08:00
  

  Now the ActiveSupport::Duration::Scalar calculation methods will try to maintain the part structure of the duration where possible, e.g:

  Time.zone = "Beijing"           # => Asia/Shanghai
  date = Date.civil(2017, 5, 20)  # => Mon, 20 May 2017
  2 * 1.day                       # => 2 days
  date + 2 * 1.day                # => Mon, 22 May 2017
  

  Fixes #29160, #28970.

  Andrew White

• Add support for versioned cache entries. This enables the cache stores to recycle cache keys, greatly saving on storage in cases with frequent churn. Works together with the separation of #cache_key and #cache_version in Active Record and its use in Action Pack's fragment caching.

  DHH

• Pass gem name and deprecation horizon to deprecation notifications.

  Willem van Bergen

• Add support for :offset and :zone to ActiveSupport::TimeWithZone#change

  Andrew White

• Add support for :offset to Time#change

  Fixes #28723.

  Andrew White

• Add fetch_values for HashWithIndifferentAccess

  The method was originally added to Hash in Ruby 2.3.0.

  Josh Pencheon

Please check 5-1-stable for previous changes.