Merge branch 'master' into laurocaetano-fix_send_file

* master: (536 commits)
  doc, API example on how to use `Model#exists?` with multiple IDs. [ci skip]
  Restore DATABASE_URL even if it's nil in connection_handler test
  [ci skip] - error_messages_for has been deprecated since 2.3.8 - lets reduce any confusion for users
  Ensure Active Record connection consistency
  Revert "ask the fixture set for the sql statements"
  Check `respond_to` before delegation due to: https://github.com/ruby/ruby/commit/d781caaf313b8649948c107bba277e5ad7307314
  Adding Hash#compact and Hash#compact! methods
  MySQL version 4.1 was EOL on December 31, 2009 We should at least recommend modern versions of MySQL to users.
  clear cache on body close so that cache remains during rendering
  add a more restricted codepath for templates fixes #13390
  refactor generator tests to use block form of Tempfile
  Fix typo [ci skip]
  Move finish_template as the last public method in the generator
  Minor typos fix [ci skip]
  make `change_column_null` reversible. Closes #13576.
  create/drop test and development databases only if RAILS_ENV is nil
  Revert "Speedup String#to"
  typo fix in test name. [ci skip].
  `core_ext/string/access.rb` test what we are documenting.
  Fix typo in image_tag documentation
  ...

Conflicts:
	actionpack/CHANGELOG.md

1 files changed, 171 insertions, 8 deletions

diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index 9c7078b9a4..adaeb99c87 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,3 +1,144 @@
+*   Added `Hash#compact` and `Hash#compact!` for removing items with nil value from hash.
+
+    *Celestino Gomes*
+
+*   Maintain proleptic gregorian in Time#advance
+
+    `Time#advance` uses `Time#to_date` and `Date#advance` to calculate a new date.
+    The `Date` object returned by `Time#to_date` is constructed with the assumption
+    that the `Time` object represents a proleptic gregorian date, but it is
+    configured to observe the default julian calendar reform date (2299161j)
+    for purposes of calculating month, date and year:
+
+        Time.new(1582, 10, 4).to_date.to_s           # => "1582-09-24"
+        Time.new(1582, 10, 4).to_date.gregorian.to_s # => "1582-10-04"
+
+    This patch ensures that when the intermediate `Date` object is advanced
+    to yield a new `Date` object, that the `Time` object for return is constructed
+    with a proleptic gregorian month, date and year.
+
+    *Riley Lynch*
+
+*   `MemCacheStore` should only accept a `Dalli::Client`, or create one.
+
+    *arthurnn*
+
+*   Don't lazy load the `tzinfo` library as it causes problems on Windows.
+
+    Fixes #13553.
+
+    *Andrew White*
+
+*   Use `remove_possible_method` instead of `remove_method` to avoid
+    a `NameError` to be thrown on FreeBSD with the `Date` object.
+
+    *Rafael Mendonça França*, *Robin Dupret*
+
+*   `blank?` and `present?` commit to return singletons.
+
+    *Xavier Noria*, *Pavel Pravosud*
+
+*   Fixed Float related error in NumberHelper with large precisions.
+
+    Before:
+
+        ActiveSupport::NumberHelper.number_to_rounded '3.14159', precision: 50
+        #=> "3.14158999999999988261834005243144929409027099609375"
+
+    After:
+
+        ActiveSupport::NumberHelper.number_to_rounded '3.14159', precision: 50
+        #=> "3.14159000000000000000000000000000000000000000000000"
+
+    *Kenta Murata*, *Akira Matsuda*
+
+*   Default the new `I18n.enforce_available_locales` config to `true`, meaning
+    `I18n` will make sure that all locales passed to it must be declared in the
+    `available_locales` list.
+
+    To disable it add the following configuration to your application:
+
+        config.i18n.enforce_available_locales = false
+
+    This also ensures I18n configuration is properly initialized taking the new
+    option into account, to avoid their deprecations while booting up the app.
+
+    *Carlos Antonio da Silva*, *Yves Senn*
+
+*   Introduce Module#concerning: a natural, low-ceremony way to separate
+    responsibilities within a class.
+
+    Imported from https://github.com/37signals/concerning#readme
+
+        class Todo < ActiveRecord::Base
+          concerning :EventTracking do
+            included do
+              has_many :events
+            end
+
+            def latest_event
+              ...
+            end
+
+            private
+              def some_internal_method
+                ...
+              end
+          end
+
+          concerning :Trashable do
+            def trashed?
+              ...
+            end
+
+            def latest_event
+              super some_option: true
+            end
+          end
+        end
+
+    is equivalent to defining these modules inline, extending them into
+    concerns, then mixing them in to the class.
+
+    Inline concerns tame "junk drawer" classes that intersperse many unrelated
+    class-level declarations, public instance methods, and private
+    implementation. Coalesce related bits and give them definition.
+    These are a stepping stone toward future growth & refactoring.
+
+    When to move on from an inline concern:
+     * Encapsulating state? Extract collaborator object.
+     * Encompassing more public behavior or implementation? Move to separate file.
+     * Sharing behavior among classes? Move to separate file.
+
+    *Jeremy Kemper*
+
+*   Fix file descriptor being leaked on each call to `Kernel.silence_stream`.
+
+    *Mario Visic*
+
+*   Added `Date#all_week/month/quarter/year` for generating date ranges.
+
+    *Dmitriy Meremyanin*
+
+*   Add `Time.zone.yesterday` and `Time.zone.tomorrow`. These follow the
+    behavior of Ruby's `Date.yesterday` and `Date.tomorrow` but return localized
+    versions, similar to how `Time.zone.today` has returned a localized version
+    of `Date.today`.
+
+    *Colin Bartlett*
+
+*   Show valid keys when `assert_valid_keys` raises an exception, and show the
+    wrong value as it was entered.
+
+    *Gonzalo Rodríguez-Baltanás Díaz*
+
+*   Both `cattr_*` and `mattr_*` method definitions now live in `active_support/core_ext/module/attribute_accessors`.
+
+    Requires to `active_support/core_ext/class/attribute_accessors` are
+    deprecated and will be removed in Ruby on Rails 4.2.
+
+    *Genadi Samokovarov*
+
 *   Deprecated `Numeric#{ago,until,since,from_now}`, the user is expected to explicitly
     convert the value into an AS::Duration, i.e. `5.ago` => `5.seconds.ago`
 
@@ -19,6 +160,22 @@
 
     *Godfrey Chan*
 
+*   Removed the old pure-Ruby JSON encoder and switched to a new encoder based on the built-in JSON
+    gem.
+
+    Support for encoding `BigDecimal` as a JSON number, as well as defining custom `encode_json`
+    methods to control the JSON output has been **removed from core**. The new encoder will always
+    encode BigDecimals as `String`s and ignore any custom `encode_json` methods.
+
+    The old encoder has been extracted into the `activesupport-json_encoder` gem. Installing that
+    gem will bring back the ability to encode `BigDecimal`s as numbers as well as `encode_json`
+    support.
+
+    Setting the related configuration `ActiveSupport.encode_big_decimal_as_string` without the
+    `activesupport-json_encoder` gem installed will raise an error.
+
+    *Godfrey Chan*
+
 *   Add `ActiveSupport::Testing::TimeHelpers#travel` and `#travel_to`. These methods change current
     time to the given time or time difference by stubbing `Time.now` and `Date.today` to return the
     time or date after the difference calculation, or the time or date that got passed into the
@@ -215,19 +372,21 @@
 
     The value of `PER_ENTRY_OVERHEAD` is 240 bytes based on an [empirical
     estimation](https://gist.github.com/ssimeonov/6047200) for 64-bit MRI on
-    1.9.3 and 2.0. GH#11512
+    1.9.3 and 2.0.
+
+    Fixes #11512.
 
     *Simeon Simeonov*
 
 *   Only raise `Module::DelegationError` if it's the source of the exception.
 
-    Fixes #10559
+    Fixes #10559.
 
     *Andrew White*
 
 *   Make `Time.at_with_coercion` retain the second fraction and return local time.
 
-    Fixes #11350
+    Fixes #11350.
 
     *Neer Friedman*, *Andrew White*
 
@@ -244,7 +403,7 @@
 
     *Arun Agrawal*
 
-*   Remove deprecated `DateTime.local_offset` in favor of `DateTime.civil_from_fromat`.
+*   Remove deprecated `DateTime.local_offset` in favor of `DateTime.civil_from_format`.
 
     *Arun Agrawal*
 
@@ -293,21 +452,21 @@
 *   Fix return value from `BacktraceCleaner#noise` when the cleaner is configured
     with multiple silencers.
 
-    Fixes #11030
+    Fixes #11030.
 
     *Mark J. Titorenko*
 
 *   `HashWithIndifferentAccess#select` now returns a `HashWithIndifferentAccess`
     instance instead of a `Hash` instance.
 
-    Fixes #10723
+    Fixes #10723.
 
     *Albert Llop*
 
 *   Add `DateTime#usec` and `DateTime#nsec` so that `ActiveSupport::TimeWithZone` keeps
     sub-second resolution when wrapping a `DateTime` value.
 
-    Fixes #10855
+    Fixes #10855.
 
     *Andrew White*
 
@@ -323,10 +482,14 @@
 *   Prevent side effects to hashes inside arrays when
     `Hash#with_indifferent_access` is called.
 
-    Fixes #10526
+    Fixes #10526.
 
     *Yves Senn*
 
+*   Removed deprecated `ActiveSupport::JSON::Variable` with no replacement.
+
+    *Toshinori Kajihara*
+
 *   Raise an error when multiple `included` blocks are defined for a Concern.
     The old behavior would silently discard previously defined blocks, running
     only the last one.