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Diffstat (limited to 'guides/source/4_2_release_notes.md')
| -rw-r--r-- | guides/source/4_2_release_notes.md | 107 |
1 files changed, 95 insertions, 12 deletions
diff --git a/guides/source/4_2_release_notes.md b/guides/source/4_2_release_notes.md index 12db528b91..1c14519506 100644 --- a/guides/source/4_2_release_notes.md +++ b/guides/source/4_2_release_notes.md @@ -16,9 +16,9 @@ Upgrading to Rails 4.2 If you're upgrading an existing application, it's a great idea to have good test coverage before going in. You should also first upgrade to Rails 4.1 in case you haven't and make sure your application still runs as expected before attempting -an update to Rails 4.2. A list of things to watch out for when upgrading is +to upgrade to Rails 4.2. A list of things to watch out for when upgrading is available in the -[Upgrading Ruby on Rails](upgrading_ruby_on_rails.html#upgrading-from-rails-4-1-to-rails-4-2) +[Upgrading Ruby on Rails](upgrading_ruby_on_rails.html#upgrading-from-rails-4.1-to-rails-4.2) guide. @@ -69,11 +69,58 @@ Please refer to the [Changelog][railties] for detailed changes. ### Notable changes -* Introduced `--skip-gems` option in the app generator to skip gems such as +* Added a `required` option to the model generator for associations. + ([Pull Request](https://github.com/rails/rails/pull/16062)) + +* Introduced an `after_bundle` callback for use in Rails templates. + ([Pull Request](https://github.com/rails/rails/pull/16359)) + +* Introduced the `x` namespace for defining custom configuration options: + + ```ruby + # config/environments/production.rb + config.x.payment_processing.schedule = :daily + config.x.payment_processing.retries = 3 + config.x.super_debugger = true + ``` + + These options are then available through the configuration object: + + ```ruby + Rails.configuration.x.payment_processing.schedule # => :daily + Rails.configuration.x.payment_processing.retries # => 3 + Rails.configuration.x.super_debugger # => true + Rails.configuration.x.super_debugger.not_set # => nil + ``` + + ([Commit](https://github.com/rails/rails/commit/611849772dd66c2e4d005dcfe153f7ce79a8a7db)) + +* Introduced `Rails::Application.config_for` to load a configuration for the + current environment. + + ```ruby + # config/exception_notification.yml: + production: + url: http://127.0.0.1:8080 + namespace: my_app_production + development: + url: http://localhost:3001 + namespace: my_app_development + + # config/production.rb + MyApp::Application.configure do + config.middleware.use ExceptionNotifier, config_for(:exception_notification) + end + ``` + + ([Pull Request](https://github.com/rails/rails/pull/16129)) + +* Introduced a `--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. +* Introduced a `bin/setup` script to enable automated setup code when + bootstrapping an application. ([Pull Request](https://github.com/rails/rails/pull/15189)) * Changed default value for `config.assets.digest` to `true` in development. @@ -85,14 +132,32 @@ Please refer to the [Changelog][railties] for detailed changes. * 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 an `after_bundle` callback in the Rails templates. + ([Pull Request](https://github.com/rails/rails/pull/16359)) + Action Pack ----------- Please refer to the [Changelog][action-pack] for detailed changes. +### Removals + +* `respond_with` and the class-level `respond_to` were removed from Rails and + moved to the `responders` gem (version 2.0). Add `gem 'responders', '~> 2.0'` + to your `Gemfile` to continue using these features. + ([Pull Request](https://github.com/rails/rails/pull/16526)) + +* Removed deprecated `AbstractController::Helpers::ClassMethods::MissingHelperError` + in favor of `AbstractController::Helpers::MissingHelperError`. + ([Commit](https://github.com/rails/rails/commit/a1ddde15ae0d612ff2973de9cf768ed701b594e8)) + ### Deprecations +* Deprecated `assert_tag`, `assert_no_tag`, `find_tag` and `find_all_tag` in + favor of `assert_select`. + ([Commit](https://github.com/rails/rails-dom-testing/commit/b12850bc5ff23ba4b599bf2770874dd4f11bf750)) + * Deprecated support for setting the `:to` option of a router to a symbol or a string that does not contain a `#` character: @@ -107,6 +172,9 @@ Please refer to the [Changelog][action-pack] for detailed changes. ### Notable changes +* Rails will now automatically include the template's digest in ETags. + ([Pull Request](https://github.com/rails/rails/pull/16527)) + * `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)) @@ -116,8 +184,8 @@ Please refer to the [Changelog][action-pack] for detailed changes. is `['controller', 'action']`. ([Pull Request](https://github.com/rails/rails/pull/15933)) -* The `*_filter` family methods has been removed from the documentation. Their - usage are discouraged in favor of the `*_action` family methods: +* The `*_filter` family methods have been removed from the documentation. Their + usage is discouraged in favor of the `*_action` family methods: ``` after_filter => after_action @@ -152,10 +220,10 @@ Please refer to the [Changelog][action-pack] for detailed changes. * 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. +* Improved the 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. +* Added an option to disable logging of CSRF failures. ([Pull Request](https://github.com/rails/rails/pull/14280)) @@ -171,12 +239,18 @@ Please refer to the [Changelog][action-view] for detailed changes. 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. +* 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 +* Introduced a `#{partial_name}_iteration` special local variable for use with + partials that are rendered with a collection. It provides access to the + current state of the iteration via the `#index`, `#size`, `#first?` and + `#last?` methods. + ([Pull Request](https://github.com/rails/rails/pull/7698)) + * 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)) @@ -187,8 +261,17 @@ Action Mailer Please refer to the [Changelog][action-mailer] for detailed changes. +### Deprecations + +* Deprecated `*_path` helpers in mailers. Always use `*_url` helpers instead. + ([Pull Request](https://github.com/rails/rails/pull/15840)) + ### Notable changes +* Introduced `deliver_later` which enqueues a job on the application's queue + to deliver the mailer asynchronously. + ([Pull Request](https://github.com/rails/rails/pull/16485)) + * Added the `show_previews` configuration option for enabling mailer previews outside of the development environment. ([Pull Request](https://github.com/rails/rails/pull/15970)) @@ -324,7 +407,7 @@ Please refer to the [Changelog][active-model] for detailed changes. ### Notable changes -* Introduced `undo_changes` method in `ActiveModel::Dirty` to restore the +* Introduced the `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)) @@ -370,7 +453,7 @@ Please refer to the [Changelog][active-support] for detailed changes. * 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 +* Introduced `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)) |