diff options
Diffstat (limited to 'guides/source/4_2_release_notes.md')
| -rw-r--r-- | guides/source/4_2_release_notes.md | 79 |
1 files changed, 55 insertions, 24 deletions
diff --git a/guides/source/4_2_release_notes.md b/guides/source/4_2_release_notes.md index 39655447e3..4736818712 100644 --- a/guides/source/4_2_release_notes.md +++ b/guides/source/4_2_release_notes.md @@ -36,11 +36,11 @@ Major Features ### Active Job, Action Mailer #deliver_later Active Job is a new framework in Rails 4.2. It is an adapter layer on top of -queuing systems like Resque, Delayed Job, Sidekiq, and more. You can write your -jobs to Active Job, and it'll run on all these queues with no changes. (It comes -pre-configured with an inline runner.) +queuing systems like [Resque](https://github.com/resque/resque), [Delayed Job](https://github.com/collectiveidea/delayed_job), [Sidekiq](https://github.com/mperham/sidekiq), and more. You can write your +jobs with the Active Job API, and it'll run on all these queues with no changes +(it comes pre-configured with an inline runner). -Building on top of Active Job, Action Mailer now comes with a #deliver_later +Building on top of Active Job, Action Mailer now comes with a `#deliver_later` method, which adds your email to be sent as a job to a queue, so it doesn't bog down the controller or model. @@ -60,13 +60,23 @@ TODO: add some technical details ### Web Console -New applications generated from Rails 4.2 now comes with the Web Console gem by +New applications generated from Rails 4.2 now come with the Web Console gem by default. -Web Console is an IRB console available in the browser. In development mode, you -can go to /console and do your work right there. It will also be made available -on all exception pages and allows you to jump between the different points in -the backtrace. +Web Console is a set of debugging tools for your Rails application. It will add +an interactive console on every error page, a `console` view helper and a VT100 +compatible terminal. + +The interactive console on the error pages lets you execute code where the +exception originated. It's quite handy to introspect the state that led to the +error. + +The `console` view helper launches an interactive console within the context of +the view where it is invoked. + +Finally, you can launch a VT100 terminal that runs `rails console`. If you need +to create or modify existing test data, you can do that straight from the +browser. ### Foreign key support @@ -113,7 +123,7 @@ Please refer to the [Changelog][railties] for detailed changes. ### Notable changes * Introduced `web-console` in the default application Gemfile. - ([Pull Request](https://github.com/rails/rails/pull/16532)) + ([Pull Request](https://github.com/rails/rails/pull/11667)) * Added a `required` option to the model generator for associations. ([Pull Request](https://github.com/rails/rails/pull/16062)) @@ -174,7 +184,8 @@ Please refer to the [Changelog][railties] for detailed changes. * 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)`. +* Introduced `Rails.gem_version` as a convenience method to return + `Gem::Version.new(Rails.version)`. ([Pull Request](https://github.com/rails/rails/pull/14101)) @@ -245,9 +256,9 @@ Please refer to the [Changelog][action-pack] for detailed changes. skip_filter => skip_action_callback ``` - If your application is depending on these methods, you should use the + If your application currently depends on these methods, you should use the replacement `*_action` methods instead. These methods will be deprecated in - the future and eventually removed from Rails. + the future and will eventually be removed from Rails. (Commit [1](https://github.com/rails/rails/commit/6c5f43bab8206747a8591435b2aa0ff7051ad3de), [2](https://github.com/rails/rails/commit/489a8f2a44dc9cea09154ee1ee2557d1f037c7d4)) @@ -255,8 +266,8 @@ Please refer to the [Changelog][action-pack] for detailed changes. * Added HTTP method `MKCALENDAR` from RFC-4791 ([Pull Request](https://github.com/rails/rails/pull/15121)) -* `*_fragment.action_controller` notifications now include the controller and action name - in the payload. +* `*_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. @@ -268,6 +279,26 @@ Please refer to the [Changelog][action-pack] for detailed changes. * Added an option to disable logging of CSRF failures. ([Pull Request](https://github.com/rails/rails/pull/14280)) +* When the Rails server is set to serve static assets, gzip assets will now be + served if the client supports it and a pre-generated gzip file (.gz) is on disk. + By default the asset pipeline generates `.gz` files for all compressible assets. + Serving gzip files minimizes data transfer and speeds up asset requests. Always + [use a CDN](http://guides.rubyonrails.org/asset_pipeline.html#cdns) if you are + serving assets from your Rails server in production. + ([Pull Request](https://github.com/rails/rails/pull/16466)) + +* The way `assert_select` works has changed; specifically a different library + is used to interpret css selectors, build the transient DOM that the + selectors are applied against, and to extract the data from that DOM. These + changes should only affect edge cases. Examples: + * Values in attribute selectors may need to be quoted if they contain + non-alphanumeric characters. + * DOMs built from HTML source containing invalid HTML with improperly + nested elements may differ. + * If the data selected contains entities, the value selected for comparison + used to be raw (e.g. `AT&T`), and now is evaluated + (e.g. `AT&T`). + Action View ------------- @@ -317,7 +348,7 @@ Please refer to the [Changelog][action-mailer] for detailed changes. ### Notable changes * Introduced `deliver_later` which enqueues a job on the application's queue - to deliver the mailer asynchronously. + to deliver emails asynchronously. ([Pull Request](https://github.com/rails/rails/pull/16485)) * Added the `show_previews` configuration option for enabling mailer previews @@ -328,9 +359,7 @@ Please refer to the [Changelog][action-mailer] for detailed changes. Active Record ------------- -Please refer to the -[Changelog](https://github.com/rails/rails/blob/4-2-stable/activerecord/CHANGELOG.md) -for detailed changes. +Please refer to the [Changelog][active-record] for detailed changes. ### Removals @@ -346,7 +375,7 @@ for detailed changes. * 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. + `ActiveRecord`, such as for XML serialization. ([Pull Request](https://github.com/rails/rails/pull/15184)) ### Deprecations @@ -441,7 +470,7 @@ for detailed changes. * `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.) + `some/path`. This behaviour was deprecated on Rails 4.1). ([Pull Request](https://github.com/rails/rails/pull/14569)) * Introduced `#validate` as an alias for `#valid?`. @@ -473,17 +502,19 @@ Please refer to the [Changelog][active-model] for detailed changes. ### Deprecations -* Deprecated reset_#{attribute} in favor of restore_#{attribute}. +* Deprecated `reset_#{attribute}` in favor of `restore_#{attribute}`. ([Pull Request](https://github.com/rails/rails/pull/16180)) -* Deprecated ActiveModel::Dirty#reset_changes in favor of #clear_changes_information. +* Deprecated `ActiveModel::Dirty#reset_changes` in favor of + `#clear_changes_information`. ([Pull Request](https://github.com/rails/rails/pull/16180)) ### Notable changes * Introduced the `restore_attributes` method in `ActiveModel::Dirty` to restore the changed (dirty) attributes to their previous values. - (Pull Request [1](https://github.com/rails/rails/pull/14861), [2](https://github.com/rails/rails/pull/16180)) + (Pull Request [1](https://github.com/rails/rails/pull/14861), + [2](https://github.com/rails/rails/pull/16180)) * `has_secure_password` no longer disallow blank passwords (i.e. passwords that contains only spaces) by default. |