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* `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](https://github.com/rails/rails/blob/4-1-stable/activesupport/CHANGELOG.md) for previous changes.
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