diff options
Diffstat (limited to 'guides/source/4_2_release_notes.md')
| -rw-r--r-- | guides/source/4_2_release_notes.md | 107 |
1 files changed, 80 insertions, 27 deletions
diff --git a/guides/source/4_2_release_notes.md b/guides/source/4_2_release_notes.md index 8c5abb54ea..2729ca6588 100644 --- a/guides/source/4_2_release_notes.md +++ b/guides/source/4_2_release_notes.md @@ -62,8 +62,17 @@ Please refer to the [Changelog][railties] for detailed changes. * 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 `--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)) @@ -97,6 +106,15 @@ Please refer to the [Changelog][action-pack] for detailed changes. ### Notable changes +* `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)) + +* 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)) + * The `*_filter` family methods has been removed from the documentation. Their usage are discouraged in favor of the `*_action` family methods: @@ -159,6 +177,10 @@ Please refer to the [Changelog][action-view] for detailed changes. ### 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 ------------- @@ -167,6 +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 ------------- @@ -177,6 +203,9 @@ for detailed changes. ### Removals +* Removed `cache_attributes` and friends. All attributes are cached. + ([Pull Request](https://github.com/rails/rails/pull/15429)) + * Removed deprecated method `ActiveRecord::Base.quoted_locking_column`. ([Pull Request](https://github.com/rails/rails/pull/15612)) @@ -184,9 +213,6 @@ for detailed changes. `proper_table_name` instance method on `ActiveRecord::Migration` instead. ([Pull Request](https://github.com/rails/rails/pull/15512)) -* Removed `cache_attributes` and friends. All attributes are cached. - ([Pull Request](https://github.com/rails/rails/pull/15429)) - * 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. @@ -194,13 +220,19 @@ for detailed changes. ### 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 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 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. @@ -216,21 +248,39 @@ for detailed changes. is not fully possible because the Ruby range does not support excluded beginnings. - 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. + 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. - ([Commit](https://github.com/rails/rails/commit/91949e48cf41af9f3e4ffba3e5eecf9b0a08bfc3)) - -* 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 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)) + +* `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)) + * Added support for `#pretty_print` in `ActiveRecord::Base` objects. ([Pull Request](https://github.com/rails/rails/pull/15172)) @@ -259,9 +309,6 @@ for detailed changes. * 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 ------------ @@ -275,6 +322,14 @@ Please refer to the [Changelog][active-model] for detailed changes. ### Notable changes +* 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)) @@ -302,20 +357,18 @@ Please refer to the [Changelog][active-support] for detailed changes. ### Notable changes +* 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)) + * The `humanize` inflector helper now strips any leading underscores. ([Commit](https://github.com/rails/rails/commit/daaa21bc7d20f2e4ff451637423a25ff2d5e75c7)) -* Added `SecureRandom::uuid_v3` and `SecureRandom::uuid_v5`. - ([Pull Request](https://github.com/rails/rails/pull/12016)) - * 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 ------- |