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* Cache: `write_multi`
Rails.cache.write_multi foo: 'bar', baz: 'qux'
Plus faster fetch_multi with stores that implement `write_multi_entries`.
Keys that aren't found may be written to the cache store in one shot
instead of separate writes.
The default implementation simply calls `write_entry` for each entry.
Stores may override if they're capable of one-shot bulk writes, like
Redis `MSET`.
*Jeremy Daer*
* Add default option to module and class attribute accessors.
mattr_accessor :settings, default: {}
Works for `mattr_reader`, `mattr_writer`, `cattr_accessor`, `cattr_reader`,
and `cattr_writer` as well.
*Genadi Samokovarov*
* Add `Date#prev_occurring` and `Date#next_occurring` to return specified next/previous occurring day of week.
*Shota Iguchi*
* 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](https://github.com/rails/rails/blob/5-1-stable/activesupport/CHANGELOG.md) for previous changes.
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