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Diffstat (limited to 'guides/source/4_2_release_notes.md')
| -rw-r--r-- | guides/source/4_2_release_notes.md | 346 |
1 files changed, 205 insertions, 141 deletions
diff --git a/guides/source/4_2_release_notes.md b/guides/source/4_2_release_notes.md index f4c2eb8945..12db528b91 100644 --- a/guides/source/4_2_release_notes.md +++ b/guides/source/4_2_release_notes.md @@ -59,22 +59,31 @@ Please refer to the [Changelog][railties] for detailed changes. ### Removals -* The `rails application` command has been removed without replacement. - ([Pull Request](https://github.com/rails/rails/pull/11616)) +* The `rails application` command has been removed without replacement. + ([Pull Request](https://github.com/rails/rails/pull/11616)) + +### Deprecations + +* Deprecated `Rails::Rack::LogTailer` without replacement. + ([Commit](https://github.com/rails/rails/commit/84a13e019e93efaa8994b3f8303d635a7702dbce)) ### Notable changes -* Introduced `bin/setup` script to bootstrap an application. - ([Pull Request](https://github.com/rails/rails/pull/15189)) +* Introduced `--skip-gems` option in the app generator to skip gems such as + `turbolinks` and `coffee-rails` that does not have their own specific flags. + ([Commit](https://github.com/rails/rails/commit/10565895805887d4faf004a6f71219da177f78b7)) + +* Introduced `bin/setup` script to bootstrap an application. + ([Pull Request](https://github.com/rails/rails/pull/15189)) -* Changed default value for `config.assets.digest` to `true` in development. - ([Pull Request](https://github.com/rails/rails/pull/15155)) +* Changed default value for `config.assets.digest` to `true` in development. + ([Pull Request](https://github.com/rails/rails/pull/15155)) -* Introduced an API to register new extensions for `rake notes`. - ([Pull Request](https://github.com/rails/rails/pull/14379)) +* Introduced an API to register new extensions for `rake notes`. + ([Pull Request](https://github.com/rails/rails/pull/14379)) -* Introduced `Rails.gem_version` as a convenience method to return `Gem::Version.new(Rails.version)`. - ([Pull Request](https://github.com/rails/rails/pull/14101)) +* Introduced `Rails.gem_version` as a convenience method to return `Gem::Version.new(Rails.version)`. + ([Pull Request](https://github.com/rails/rails/pull/14101)) Action Pack @@ -84,56 +93,70 @@ Please refer to the [Changelog][action-pack] for detailed changes. ### Deprecations -* Deprecated support for setting the `:to` option of a router to a symbol or a - string that does not contain a `#` character: +* Deprecated support for setting the `:to` option of a router to a symbol or a + string that does not contain a `#` character: - get '/posts', to: MyRackApp => (No change necessary) - get '/posts', to: 'post#index' => (No change necessary) - get '/posts', to: 'posts' => get '/posts', controller: :posts - get '/posts', to: :index => get '/posts', action: :index + ```ruby + get '/posts', to: MyRackApp => (No change necessary) + get '/posts', to: 'post#index' => (No change necessary) + get '/posts', to: 'posts' => get '/posts', controller: :posts + get '/posts', to: :index => get '/posts', action: :index + ``` - ([Commit](https://github.com/rails/rails/commit/cc26b6b7bccf0eea2e2c1a9ebdcc9d30ca7390d9)) + ([Commit](https://github.com/rails/rails/commit/cc26b6b7bccf0eea2e2c1a9ebdcc9d30ca7390d9)) ### Notable changes -* The `*_filter` family methods has been removed from the documentation. Their - usage are discouraged in favor of the `*_action` family methods: +* `render nothing: true` or rendering a `nil` body no longer add a single + space padding to the response body. + ([Pull Request](https://github.com/rails/rails/pull/14883)) - after_filter => after_action - append_after_filter => append_after_action - append_around_filter => append_around_action - append_before_filter => append_before_action - around_filter => around_action - before_filter => before_action - prepend_after_filter => prepend_after_action - prepend_around_filter => prepend_around_action - prepend_before_filter => prepend_before_action - skip_after_filter => skip_after_action - skip_around_filter => skip_around_action - skip_before_filter => skip_before_action - skip_filter => skip_action_callback +* Introduced the `always_permitted_parameters` option to configure which + parameters are permitted globally. The default value of this configuration + is `['controller', 'action']`. + ([Pull Request](https://github.com/rails/rails/pull/15933)) - If your application is depending on these methods, you should use the - replacement `*_action` methods instead. These methods will be deprecated in - the future and eventually removed from Rails. - (Commit [1](https://github.com/rails/rails/commit/6c5f43bab8206747a8591435b2aa0ff7051ad3de), - [2](https://github.com/rails/rails/commit/489a8f2a44dc9cea09154ee1ee2557d1f037c7d4)) +* The `*_filter` family methods has been removed from the documentation. Their + usage are discouraged in favor of the `*_action` family methods: -* Added HTTP method `MKCALENDAR` from RFC-4791 - ([Pull Request](https://github.com/rails/rails/pull/15121)) + ``` + after_filter => after_action + append_after_filter => append_after_action + append_around_filter => append_around_action + append_before_filter => append_before_action + around_filter => around_action + before_filter => before_action + prepend_after_filter => prepend_after_action + prepend_around_filter => prepend_around_action + prepend_before_filter => prepend_before_action + skip_after_filter => skip_after_action + skip_around_filter => skip_around_action + skip_before_filter => skip_before_action + skip_filter => skip_action_callback + ``` -* `*_fragment.action_controller` notifications now include the controller and action name - in the payload. - ([Pull Request](https://github.com/rails/rails/pull/14137)) + If your application is depending on these methods, you should use the + replacement `*_action` methods instead. These methods will be deprecated in + the future and eventually removed from Rails. -* Segments that are passed into URL helpers are now automatically escaped. - ([Commit](https://github.com/rails/rails/commit/5460591f0226a9d248b7b4f89186bd5553e7768f)) + (Commit [1](https://github.com/rails/rails/commit/6c5f43bab8206747a8591435b2aa0ff7051ad3de), + [2](https://github.com/rails/rails/commit/489a8f2a44dc9cea09154ee1ee2557d1f037c7d4)) -* Improved Routing Error page with fuzzy matching for route search. - ([Pull Request](https://github.com/rails/rails/pull/14619)) +* Added HTTP method `MKCALENDAR` from RFC-4791 + ([Pull Request](https://github.com/rails/rails/pull/15121)) -* Added option to disable logging of CSRF failures. - ([Pull Request](https://github.com/rails/rails/pull/14280)) +* `*_fragment.action_controller` notifications now include the controller and action name + in the payload. + ([Pull Request](https://github.com/rails/rails/pull/14137)) + +* Segments that are passed into URL helpers are now automatically escaped. + ([Commit](https://github.com/rails/rails/commit/5460591f0226a9d248b7b4f89186bd5553e7768f)) + +* Improved Routing Error page with fuzzy matching for route search. + ([Pull Request](https://github.com/rails/rails/pull/14619)) + +* Added option to disable logging of CSRF failures. + ([Pull Request](https://github.com/rails/rails/pull/14280)) Action View @@ -143,17 +166,21 @@ Please refer to the [Changelog][action-view] for detailed changes. ### Deprecations -* Deprecated `AbstractController::Base.parent_prefixes`. - Override `AbstractController::Base.local_prefixes` when you want to change - where to find views. - ([Pull Request](https://github.com/rails/rails/pull/15026)) +* Deprecated `AbstractController::Base.parent_prefixes`. + Override `AbstractController::Base.local_prefixes` when you want to change + where to find views. + ([Pull Request](https://github.com/rails/rails/pull/15026)) -* Deprecated `ActionView::Digestor#digest(name, format, finder, options = {})`, - arguments should be passed as a hash instead. - ([Pull Request](https://github.com/rails/rails/pull/14243)) +* Deprecated `ActionView::Digestor#digest(name, format, finder, options = {})`, + arguments should be passed as a hash instead. + ([Pull Request](https://github.com/rails/rails/pull/14243)) ### Notable changes +* The form helpers no longer generate a `<div>` element with inline CSS around + the hidden fields. + ([Pull Request](https://github.com/rails/rails/pull/14738)) + Action Mailer ------------- @@ -162,6 +189,10 @@ Please refer to the [Changelog][action-mailer] for detailed changes. ### Notable changes +* Added the `show_previews` configuration option for enabling mailer previews + outside of the development environment. + ([Pull Request](https://github.com/rails/rails/pull/15970)) + Active Record ------------- @@ -172,91 +203,114 @@ for detailed changes. ### Removals -* Removed deprecated method `ActiveRecord::Base.quoted_locking_column`. - ([Pull Request](https://github.com/rails/rails/pull/15612)) +* Removed `cache_attributes` and friends. All attributes are cached. + ([Pull Request](https://github.com/rails/rails/pull/15429)) -* Removed deprecated `ActiveRecord::Migrator.proper_table_name`. Use the - `proper_table_name` instance method on `ActiveRecord::Migration` instead. - ([Pull Request](https://github.com/rails/rails/pull/15512)) +* Removed deprecated method `ActiveRecord::Base.quoted_locking_column`. + ([Pull Request](https://github.com/rails/rails/pull/15612)) -* Removed `cache_attributes` and friends. All attributes are cached. - ([Pull Request](https://github.com/rails/rails/pull/15429)) +* Removed deprecated `ActiveRecord::Migrator.proper_table_name`. Use the + `proper_table_name` instance method on `ActiveRecord::Migration` instead. + ([Pull Request](https://github.com/rails/rails/pull/15512)) -* Removed unused `:timestamp` type. Transparently alias it to `:datetime` - in all cases. Fixes inconsistencies when column types are sent outside of - `ActiveRecord`, such as for XML Serialization. - ([Pull Request](https://github.com/rails/rails/pull/15184)) +* Removed unused `:timestamp` type. Transparently alias it to `:datetime` + in all cases. Fixes inconsistencies when column types are sent outside of + `ActiveRecord`, such as for XML Serialization. + ([Pull Request](https://github.com/rails/rails/pull/15184)) ### Deprecations -* Deprecated returning `nil` from `column_for_attribute` when no column exists. - It will return a null object in Rails 5.0 - ([Pull Request](https://github.com/rails/rails/pull/15878)) +* Deprecated broken support for automatic detection of counter caches on + `has_many :through` associations. You should instead manually specify the + counter cache on the `has_many` and `belongs_to` associations for the + through records. + ([Pull Request](https://github.com/rails/rails/pull/15754)) -* Deprecated `serialized_attributes` without replacement. - ([Pull Request](https://github.com/rails/rails/pull/15704)) +* Deprecated `serialized_attributes` without replacement. + ([Pull Request](https://github.com/rails/rails/pull/15704)) -* Deprecated using `.joins`, `.preload` and `.eager_load` with associations that - depends on the instance state (i.e. those defined with a scope that takes an - argument) without replacement. - ([Commit](https://github.com/rails/rails/commit/ed56e596a0467390011bc9d56d462539776adac1)) +* Deprecated returning `nil` from `column_for_attribute` when no column + exists. It will return a null object in Rails 5.0 + ([Pull Request](https://github.com/rails/rails/pull/15878)) -* Deprecated passing Active Record objects to `.find` or `.exists?`. Call `#id` - on the objects first. - (Commit [1](https://github.com/rails/rails/commit/d92ae6ccca3bcfd73546d612efaea011270bd270), - [2](https://github.com/rails/rails/commit/d35f0033c7dec2b8d8b52058fb8db495d49596f7)) +* Deprecated using `.joins`, `.preload` and `.eager_load` with associations + that depends on the instance state (i.e. those defined with a scope that + takes an argument) without replacement. + ([Commit](https://github.com/rails/rails/commit/ed56e596a0467390011bc9d56d462539776adac1)) -* Deprecated half-baked support for PostgreSQL range values with excluding - beginnings. We currently map PostgreSQL ranges to Ruby ranges. This conversion - is not fully possible because the Ruby range does not support excluded - beginnings. +* Deprecated passing Active Record objects to `.find` or `.exists?`. Call + `#id` on the objects first. + (Commit [1](https://github.com/rails/rails/commit/d92ae6ccca3bcfd73546d612efaea011270bd270), + [2](https://github.com/rails/rails/commit/d35f0033c7dec2b8d8b52058fb8db495d49596f7)) - The current solution of incrementing the beginning is not correct and is now - deprecated. For subtypes where we don't know how to increment (e.g. `#succ` - is not defined) it will raise an `ArgumentError` for ranges with excluding - beginnings. +* Deprecated half-baked support for PostgreSQL range values with excluding + beginnings. We currently map PostgreSQL ranges to Ruby ranges. This conversion + is not fully possible because the Ruby range does not support excluded + beginnings. - ([Commit](https://github.com/rails/rails/commit/91949e48cf41af9f3e4ffba3e5eecf9b0a08bfc3)) + The current solution of incrementing the beginning is not correct + and is now deprecated. For subtypes where we don't know how to increment + (e.g. `#succ` is not defined) it will raise an `ArgumentError` for ranges + with excluding beginnings. -* Deprecated broken support for automatic detection of counter caches on - `has_many :through` associations. You should instead manually specify the - counter cache on the `has_many` and `belongs_to` associations for the through - records. - ([Pull Request](https://github.com/rails/rails/pull/15754)) + ([Commit](https://github.com/rails/rails/commit/91949e48cf41af9f3e4ffba3e5eecf9b0a08bfc3)) ### Notable changes -* Added support for `#pretty_print` in `ActiveRecord::Base` objects. - ([Pull Request](https://github.com/rails/rails/pull/15172)) +* Added a `:required` option to singular associations, which defines a + presence validation on the association. + ([Pull Request](https://github.com/rails/rails/pull/16056)) + +* Introduced `ActiveRecord::Base#validate!` that raises `RecordInvalid` if the + record is invalid. + ([Pull Request](https://github.com/rails/rails/pull/8639)) + +* `ActiveRecord::Base#reload` now behaves the same as `m = Model.find(m.id)`, + meaning that it no longer retains the extra attributes from custom + `select`s. + ([Pull Request](https://github.com/rails/rails/pull/15866)) + +* Introduced the `bin/rake db:purge` task to empty the database for the + current environment. + ([Commit](https://github.com/rails/rails/commit/e2f232aba15937a4b9d14bd91e0392c6d55be58d)) -* PostgreSQL and SQLite adapters no longer add a default limit of 255 characters - on string columns. - ([Pull Request](https://github.com/rails/rails/pull/14579)) +* `ActiveRecord::Dirty` now detects in-place changes to mutable values. + Serialized attributes on ActiveRecord models will no longer save when + unchanged. This also works with other types such as string columns and json + columns on PostgreSQL. + (Pull Requests [1](https://github.com/rails/rails/pull/15674), + [2](https://github.com/rails/rails/pull/15786), + [3](https://github.com/rails/rails/pull/15788)) -* `sqlite3:///some/path` now resolves to the absolute system path `/some/path`. - For relative paths, use `sqlite3:some/path` instead. (Previously, `sqlite3:///some/path` - resolved to the relative path `some/path`. This behaviour was deprecated on - Rails 4.1.) - ([Pull Request](https://github.com/rails/rails/pull/14569)) +* Added support for `#pretty_print` in `ActiveRecord::Base` objects. + ([Pull Request](https://github.com/rails/rails/pull/15172)) -* Introduced `#validate` as an alias for `#valid?`. - ([Pull Request](https://github.com/rails/rails/pull/14456)) +* PostgreSQL and SQLite adapters no longer add a default limit of 255 + characters on string columns. + ([Pull Request](https://github.com/rails/rails/pull/14579)) -* `#touch` now accepts multiple attributes to be touched at once. - ([Pull Request](https://github.com/rails/rails/pull/14423)) +* `sqlite3:///some/path` now resolves to the absolute system path + `/some/path`. For relative paths, use `sqlite3:some/path` instead. + (Previously, `sqlite3:///some/path` resolved to the relative path + `some/path`. This behaviour was deprecated on Rails 4.1.) + ([Pull Request](https://github.com/rails/rails/pull/14569)) -* Added support for fractional seconds for MySQL 5.6 and above. - (Pull Request [1](https://github.com/rails/rails/pull/8240), [2](https://github.com/rails/rails/pull/14359)) +* Introduced `#validate` as an alias for `#valid?`. + ([Pull Request](https://github.com/rails/rails/pull/14456)) -* Added support for the `citext` column type in PostgreSQL adapter. - ([Pull Request](https://github.com/rails/rails/pull/12523)) +* `#touch` now accepts multiple attributes to be touched at once. + ([Pull Request](https://github.com/rails/rails/pull/14423)) -* Added support for user-created range types in PostgreSQL adapter. - ([Commit](https://github.com/rails/rails/commit/4cb47167e747e8f9dc12b0ddaf82bdb68c03e032)) +* Added support for fractional seconds for MySQL 5.6 and above. + (Pull Request [1](https://github.com/rails/rails/pull/8240), + [2](https://github.com/rails/rails/pull/14359)) + +* Added support for the `citext` column type in PostgreSQL adapter. + ([Pull Request](https://github.com/rails/rails/pull/12523)) + +* Added support for user-created range types in PostgreSQL adapter. + ([Commit](https://github.com/rails/rails/commit/4cb47167e747e8f9dc12b0ddaf82bdb68c03e032)) -* Added a `:required` option to singular associations, which defines a - presence validation on the association. - ([Pull Request](https://github.com/rails/rails/pull/16056)) Active Model ------------ @@ -265,13 +319,21 @@ Please refer to the [Changelog][active-model] for detailed changes. ### Removals -* Removed deprecated `Validator#setup` without replacement. - ([Pull Request](https://github.com/rails/rails/pull/15617)) +* Removed deprecated `Validator#setup` without replacement. + ([Pull Request](https://github.com/rails/rails/pull/15617)) ### Notable changes -* Introduced `#validate` as an alias for `#valid?`. - ([Pull Request](https://github.com/rails/rails/pull/14456)) +* Introduced `undo_changes` method in `ActiveModel::Dirty` to restore the + changed (dirty) attributes to their previous values. + ([Pull Request](https://github.com/rails/rails/pull/14861)) + +* `has_secure_password` now verifies that the given password is less than 72 + characters if validations are enabled. + ([Pull Request](https://github.com/rails/rails/pull/15708)) + +* Introduced `#validate` as an alias for `#valid?`. + ([Pull Request](https://github.com/rails/rails/pull/14456)) Active Support @@ -281,44 +343,46 @@ Please refer to the [Changelog][active-support] for detailed changes. ### Removals -* Removed deprecated `Numeric#ago`, `Numeric#until`, `Numeric#since`, - `Numeric#from_now`. ([Commit](https://github.com/rails/rails/commit/f1eddea1e3f6faf93581c43651348f48b2b7d8bb)) +* Removed deprecated `Numeric#ago`, `Numeric#until`, `Numeric#since`, + `Numeric#from_now`. + ([Commit](https://github.com/rails/rails/commit/f1eddea1e3f6faf93581c43651348f48b2b7d8bb)) -* Removed deprecated string based terminators for `ActiveSupport::Callbacks`. - ([Pull Request](https://github.com/rails/rails/pull/15100)) +* Removed deprecated string based terminators for `ActiveSupport::Callbacks`. + ([Pull Request](https://github.com/rails/rails/pull/15100)) ### Deprecations -* Deprecated `Class#superclass_delegating_accessor`, use `Class#class_attribute` - instead. ([Pull Request](https://github.com/rails/rails/pull/14271)) +* Deprecated `Class#superclass_delegating_accessor`, use + `Class#class_attribute` instead. + ([Pull Request](https://github.com/rails/rails/pull/14271)) -* Deprecated `ActiveSupport::SafeBuffer#prepend!` as `ActiveSupport::SafeBuffer#prepend` - now performs the same function. ([Pull Request](https://github.com/rails/rails/pull/14529)) +* Deprecated `ActiveSupport::SafeBuffer#prepend!` as + `ActiveSupport::SafeBuffer#prepend` now performs the same function. + ([Pull Request](https://github.com/rails/rails/pull/14529)) ### Notable changes -* The `humanize` inflector helper now strips any leading underscores. - ([Commit](https://github.com/rails/rails/commit/daaa21bc7d20f2e4ff451637423a25ff2d5e75c7)) +* Added `Hash#transform_values` and `Hash#transform_values!` to simplify a + common pattern where the values of a hash must change, but the keys are left + the same. + ([Pull Request](https://github.com/rails/rails/pull/15819)) -* Added `SecureRandom::uuid_v3` and `SecureRandom::uuid_v5`. - ([Pull Request](https://github.com/rails/rails/pull/12016)) +* The `humanize` inflector helper now strips any leading underscores. + ([Commit](https://github.com/rails/rails/commit/daaa21bc7d20f2e4ff451637423a25ff2d5e75c7)) -* Introduce `Concern#class_methods` as an alternative to `module ClassMethods`, - as well as `Kernel#concern` to avoid the `module Foo; extend ActiveSupport::Concern; end` - boilerplate. ([Commit](https://github.com/rails/rails/commit/b16c36e688970df2f96f793a759365b248b582ad)) +* Introduce `Concern#class_methods` as an alternative to + `module ClassMethods`, as well as `Kernel#concern` to avoid the + `module Foo; extend ActiveSupport::Concern; end` boilerplate. + ([Commit](https://github.com/rails/rails/commit/b16c36e688970df2f96f793a759365b248b582ad)) -* Added `Hash#transform_values` and `Hash#transform_values!` to simplify a - common pattern where the values of a hash must change, but the keys are left - the same. - ([Pull Request](https://github.com/rails/rails/pull/15819)) Credits ------- See the [full list of contributors to Rails](http://contributors.rubyonrails.org/) for -the many people who spent many hours making Rails, the stable and robust -framework it is. Kudos to all of them. +the many people who spent many hours making Rails the stable and robust +framework it is today. Kudos to all of them. [railties]: https://github.com/rails/rails/blob/4-2-stable/railties/CHANGELOG.md [action-pack]: https://github.com/rails/rails/blob/4-2-stable/actionpack/CHANGELOG.md |