@@ -125,7 +125,7 @@ There are two big additions to talk about here: transactional migrations and poo
Historically, multiple-step Rails migrations have been a source of trouble. If something went wrong during a migration, everything before the error changed the database and everything after the error wasn't applied. Also, the migration version was stored as having been executed, which means that it couldn't be simply rerun by `rake db:migrate:redo` after you fix the problem. Transactional migrations change this by wrapping migration steps in a DDL transaction, so that if any of them fail, the entire migration is undone. In Rails 2.2, transactional migrations are supported on PostgreSQL out of the box. The code is extensible to other database types in the future - and IBM has already extended it to support the DB2 adapter.
* Lead Contributor: [Adam Wiggins](http://adam.heroku.com/)
* Lead Contributor: [Adam Wiggins](http://about.adamwiggins.com/)
@@ -234,7 +234,7 @@ Rails chooses between file, template, and action depending on whether there is a
If you're one of the people who has always been bothered by the special-case naming of `application.rb`, rejoice! It's been reworked to be `application_controller.rb` in Rails 2.3. In addition, there's a new rake task, `rake rails:update:application_controller` to do this automatically for you - and it will be run as part of the normal `rake rails:update` process.
* More Information:
*[The Death of Application.rb](http://afreshcup.com/2008/11/17/rails-2x-the-death-of-applicationrb/)
*[The Death of Application.rb](https://afreshcup.com/home/2008/11/17/rails-2x-the-death-of-applicationrb)
*[What's New in Edge Rails: Application.rb Duality is no More](http://archives.ryandaigle.com/articles/2008/11/19/what-s-new-in-edge-rails-application-rb-duality-is-no-more)
* Lead Contributor: [Tekin Suleyman](http://tekin.co.uk/)
* More Information: [New in rails 2.3 - disabled option tags and lambdas for selecting and disabling options from collections](http://tekin.co.uk/2009/03/new-in-rails-23-disabled-option-tags-and-lambdas-for-selecting-and-disabling-options-from-collections/)
* More Information: [New in rails 2.3 - disabled option tags and lambdas for selecting and disabling options from collections](https://tekin.co.uk/2009/03/new-in-rails-23-disabled-option-tags-and-lambdas-for-selecting-and-disabling-options-from-collections)
### A Note About Template Loading
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@@ -533,7 +533,7 @@ If you look up the spec on the "json.org" site, you'll discover that all keys in
### Other Active Support Changes
* You can use `Enumerable#none?` to check that none of the elements match the supplied block.
* If you're using Active Support [delegates](http://afreshcup.com/2008/10/19/coming-in-rails-22-delegate-prefixes/) the new `:allow_nil` option lets you return `nil` instead of raising an exception when the target object is nil.
* If you're using Active Support [delegates](https://afreshcup.com/home/2008/10/19/coming-in-rails-22-delegate-prefixes) the new `:allow_nil` option lets you return `nil` instead of raising an exception when the target object is nil.
*`ActiveSupport::OrderedHash`: now implements `each_key` and `each_value`.
*`ActiveSupport::MessageEncryptor` provides a simple way to encrypt information for storage in an untrusted location (like cookies).
* Active Support's `from_xml` no longer depends on XmlSimple. Instead, Rails now includes its own XmlMini implementation, with just the functionality that it requires. This lets Rails dispense with the bundled copy of XmlSimple that it's been carting around.
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@@ -592,7 +592,7 @@ The internals of the various <code>rake gem</code> tasks have been substantially
* Internal Rails testing has been switched from `Test::Unit::TestCase` to `ActiveSupport::TestCase`, and the Rails core requires Mocha to test.
* The default `environment.rb` file has been decluttered.
* The dbconsole script now lets you use an all-numeric password without crashing.
*`Rails.root` now returns a `Pathname` object, which means you can use it directly with the `join` method to [clean up existing code](http://afreshcup.com/2008/12/05/a-little-rails_root-tidiness/) that uses `File.join`.
*`Rails.root` now returns a `Pathname` object, which means you can use it directly with the `join` method to [clean up existing code](https://afreshcup.wordpress.com/2008/12/05/a-little-rails_root-tidiness/) that uses `File.join`.
* Various files in /public that deal with CGI and FCGI dispatching are no longer generated in every Rails application by default (you can still get them if you need them by adding `--with-dispatchers` when you run the `rails` command, or add them later with `rake rails:update:generate_dispatchers`).
* Rails Guides have been converted from AsciiDoc to Textile markup.
* Scaffolded views and controllers have been cleaned up a bit.
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@@ -605,7 +605,7 @@ Deprecated
A few pieces of older code are deprecated in this release:
* If you're one of the (fairly rare) Rails developers who deploys in a fashion that depends on the inspector, reaper, and spawner scripts, you'll need to know that those scripts are no longer included in core Rails. If you need them, you'll be able to pick up copies via the [irs_process_scripts](https://github.com/rails/irs_process_scripts/tree) plugin.
* If you're one of the (fairly rare) Rails developers who deploys in a fashion that depends on the inspector, reaper, and spawner scripts, you'll need to know that those scripts are no longer included in core Rails. If you need them, you'll be able to pick up copies via the [irs_process_scripts](https://github.com/rails/irs_process_scripts) plugin.
*`render_component` goes from "deprecated" to "nonexistent" in Rails 2.3. If you still need it, you can install the [render_component plugin](https://github.com/rails/render_component/tree/master).
* Support for Rails components has been removed.
* If you were one of the people who got used to running `script/performance/request` to look at performance based on integration tests, you need to learn a new trick: that script has been removed from core Rails now. There's a new request_profiler plugin that you can install to get the exact same functionality back.
The [`TagAssertions` module](http://api.rubyonrails.org/classes/ActionDispatch/Assertions/TagAssertions.html)(containing methods such as `assert_tag`), [has been deprecated](https://github.com/rails/rails/blob/6061472b8c310158a2a2e8e9a6b81a1aef6b60fe/actionpack/lib/action_dispatch/testing/assertions/dom.rb) in favor of the `assert_select` methods from the `SelectorAssertions` module, which has been extracted into the [rails-dom-testing gem](https://github.com/rails/rails-dom-testing).
The [`TagAssertions` module](http://api.rubyonrails.org/v4.1/classes/ActionDispatch/Assertions/TagAssertions.html)(containing methods such as `assert_tag`), [has been deprecated](https://github.com/rails/rails/blob/6061472b8c310158a2a2e8e9a6b81a1aef6b60fe/actionpack/lib/action_dispatch/testing/assertions/dom.rb) in favor of the `assert_select` methods from the `SelectorAssertions` module, which has been extracted into the [rails-dom-testing gem](https://github.com/rails/rails-dom-testing).