@@ -131,7 +131,15 @@ The following changes are meant for upgrading your application to Rails 4.0.
### Gemfile
Rails 4.0 removed the `assets` group from Gemfile. You'd need to remove that line from your Gemfile when upgrading.
Rails 4.0 removed the `assets` group from Gemfile. You'd need to remove that
line from your Gemfile when upgrading. You should also update your application
file (in `config/application.rb`):
```ruby
# Require the gems listed in Gemfile, including any gems
# you've limited to :test, :development, or :production.
Bundler.require(:default,Rails.env)
```
### vendor/plugins
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@@ -149,6 +157,9 @@ Rails 4.0 no longer supports loading plugins from `vendor/plugins`. You must rep
* Rails 4.0 has removed `attr_accessible` and `attr_protected` feature in favor of Strong Parameters. You can use the [Protected Attributes gem](https://github.com/rails/protected_attributes) to a smoothly upgrade path.
* If you are not using Protected Attributes, you can remove any options related to
this gem such as `whitelist_attributes` or `mass_assignment_sanitizer` options.
* Rails 4.0 requires that scopes use a callable object such as a Proc or lambda:
```ruby
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@@ -208,6 +219,11 @@ Please read [Pull Request #9978](https://github.com/rails/rails/pull/9978) for d
* Rails 4.0 deprecates the `dom_id` and `dom_class` methods in controllers (they are fine in views). You will need to include the `ActionView::RecordIdentifier` module in controllers requiring this feature.
* Rails 4.0 deprecates the `:confirm` option for the `link_to` helper. You should
instead rely on a data attribute (e.g. `data: { confirm: 'Are you sure?' }`).
This deprecation also concerns the helpers based on this one (such as `link_to_if`
or `link_to_unless`).
* Rails 4.0 changed how `assert_generates`, `assert_recognizes`, and `assert_routing` work. Now all these assertions raise `Assertion` instead of `ActionController::RoutingError`.
* Rails 4.0 raises an `ArgumentError` if clashing named routes are defined. This can be triggered by explicitly defined named routes or by the `resources` method. Here are two examples that clash with routes named `example_path`:
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@@ -295,6 +311,12 @@ Active Record Observer and Action Controller Sweeper have been extracted to the
### sprockets-rails
*`assets:precompile:primary` has been removed. Use `assets:precompile` instead.
* The `config.assets.compress` option should be changed to
`config.assets.js_compressor` like so for instance:
