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861 lines
36 KiB
Markdown
861 lines
36 KiB
Markdown
**DO NOT READ THIS FILE ON GITHUB, GUIDES ARE PUBLISHED ON https://guides.rubyonrails.org.**
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Ruby on Rails 5.2 Release Notes
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===============================
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Highlights in Rails 5.2:
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* Active Storage
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* Redis Cache Store
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* HTTP/2 Early Hints
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* Credentials
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* Content Security Policy
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These release notes cover only the major changes. To learn about various bug
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fixes and changes, please refer to the change logs or check out the [list of
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commits](https://github.com/rails/rails/commits/5-2-stable) in the main Rails
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repository on GitHub.
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--------------------------------------------------------------------------------
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Upgrading to Rails 5.2
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----------------------
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If you're upgrading an existing application, it's a great idea to have good test
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coverage before going in. You should also first upgrade to Rails 5.1 in case you
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haven't and make sure your application still runs as expected before attempting
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an update to Rails 5.2. A list of things to watch out for when upgrading is
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available in the
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[Upgrading Ruby on Rails](upgrading_ruby_on_rails.html#upgrading-from-rails-5-1-to-rails-5-2)
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guide.
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Major Features
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--------------
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### Active Storage
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[Pull Request](https://github.com/rails/rails/pull/30020)
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[Active Storage](https://github.com/rails/rails/tree/5-2-stable/activestorage)
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facilitates uploading files to a cloud storage service like
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Amazon S3, Google Cloud Storage, or Microsoft Azure Storage and attaching
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those files to Active Record objects. It comes with a local disk-based service
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for development and testing and supports mirroring files to subordinate
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services for backups and migrations.
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You can read more about Active Storage in the
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[Active Storage Overview](active_storage_overview.html) guide.
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### Redis Cache Store
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[Pull Request](https://github.com/rails/rails/pull/31134)
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Rails 5.2 ships with built-in Redis cache store.
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You can read more about this in the
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[Caching with Rails: An Overview](caching_with_rails.html#activesupport-cache-rediscachestore)
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guide.
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### HTTP/2 Early Hints
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[Pull Request](https://github.com/rails/rails/pull/30744)
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Rails 5.2 supports [HTTP/2 Early Hints](https://tools.ietf.org/html/rfc8297).
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To start the server with Early Hints enabled pass `--early-hints`
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to `bin/rails server`.
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### Credentials
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[Pull Request](https://github.com/rails/rails/pull/30067)
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Added `config/credentials.yml.enc` file to store production app secrets.
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It allows saving any authentication credentials for third-party services
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directly in repository encrypted with a key in the `config/master.key` file or
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the `RAILS_MASTER_KEY` environment variable.
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This will eventually replace `Rails.application.secrets` and the encrypted
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secrets introduced in Rails 5.1.
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Furthermore, Rails 5.2
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[opens API underlying Credentials](https://github.com/rails/rails/pull/30940),
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so you can easily deal with other encrypted configurations, keys, and files.
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You can read more about this in the
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[Securing Rails Applications](security.html#custom-credentials)
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guide.
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### Content Security Policy
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[Pull Request](https://github.com/rails/rails/pull/31162)
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Rails 5.2 ships with a new DSL that allows you to configure a
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[Content Security Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy)
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for your application. You can configure a global default policy and then
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override it on a per-resource basis and even use lambdas to inject per-request
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values into the header such as account subdomains in a multi-tenant application.
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You can read more about this in the
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[Securing Rails Applications](security.html#content-security-policy)
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guide.
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Railties
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--------
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Please refer to the [Changelog][railties] for detailed changes.
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### Deprecations
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* Deprecate `capify!` method in generators and templates.
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([Pull Request](https://github.com/rails/rails/pull/29493))
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* Passing the environment's name as a regular argument to the
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`rails dbconsole` and `rails console` commands is deprecated.
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The `-e` option should be used instead.
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([Commit](https://github.com/rails/rails/commit/48b249927375465a7102acc71c2dfb8d49af8309))
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* Deprecate using subclass of `Rails::Application` to start the Rails server.
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([Pull Request](https://github.com/rails/rails/pull/30127))
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* Deprecate `after_bundle` callback in Rails plugin templates.
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([Pull Request](https://github.com/rails/rails/pull/29446))
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### Notable changes
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* Added a shared section to `config/database.yml` that will be loaded for
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all environments.
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([Pull Request](https://github.com/rails/rails/pull/28896))
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* Add `railtie.rb` to the plugin generator.
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([Pull Request](https://github.com/rails/rails/pull/29576))
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* Clear screenshot files in `tmp:clear` task.
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([Pull Request](https://github.com/rails/rails/pull/29534))
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* Skip unused components when running `bin/rails app:update`.
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If the initial app generation skipped Action Cable, Active Record etc.,
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the update task honors those skips too.
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([Pull Request](https://github.com/rails/rails/pull/29645))
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* Allow passing a custom connection name to the `rails dbconsole`
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command when using a 3-level database configuration.
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Example: `bin/rails dbconsole -c replica`.
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([Commit](https://github.com/rails/rails/commit/1acd9a6464668d4d54ab30d016829f60b70dbbeb))
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* Properly expand shortcuts for environment's name running the `console`
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and `dbconsole` commands.
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([Commit](https://github.com/rails/rails/commit/3777701f1380f3814bd5313b225586dec64d4104))
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* Add `bootsnap` to default `Gemfile`.
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([Pull Request](https://github.com/rails/rails/pull/29313))
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* Support `-` as a platform-agnostic way to run a script from stdin with
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`rails runner`
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([Pull Request](https://github.com/rails/rails/pull/26343))
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* Add `ruby x.x.x` version to `Gemfile` and create `.ruby-version`
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root file containing the current Ruby version when new Rails applications
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are created.
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([Pull Request](https://github.com/rails/rails/pull/30016))
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* Add `--skip-action-cable` option to the plugin generator.
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([Pull Request](https://github.com/rails/rails/pull/30164))
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* Add `git_source` to `Gemfile` for plugin generator.
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([Pull Request](https://github.com/rails/rails/pull/30110))
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* Skip unused components when running `bin/rails` in Rails plugin.
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([Commit](https://github.com/rails/rails/commit/62499cb6e088c3bc32a9396322c7473a17a28640))
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* Optimize indentation for generator actions.
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([Pull Request](https://github.com/rails/rails/pull/30166))
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* Optimize routes indentation.
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([Pull Request](https://github.com/rails/rails/pull/30241))
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* Add `--skip-yarn` option to the plugin generator.
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([Pull Request](https://github.com/rails/rails/pull/30238))
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* Support multiple versions arguments for `gem` method of Generators.
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([Pull Request](https://github.com/rails/rails/pull/30323))
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* Derive `secret_key_base` from the app name in development and test
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environments.
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([Pull Request](https://github.com/rails/rails/pull/30067))
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* Add `mini_magick` to default `Gemfile` as comment.
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([Pull Request](https://github.com/rails/rails/pull/30633))
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* `rails new` and `rails plugin new` get `Active Storage` by default.
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Add ability to skip `Active Storage` with `--skip-active-storage`
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and do so automatically when `--skip-active-record` is used.
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([Pull Request](https://github.com/rails/rails/pull/30101))
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Action Cable
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------------
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Please refer to the [Changelog][action-cable] for detailed changes.
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### Removals
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* Removed deprecated evented redis adapter.
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([Commit](https://github.com/rails/rails/commit/48766e32d31651606b9f68a16015ad05c3b0de2c))
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### Notable changes
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* Add support for `host`, `port`, `db` and `password` options in cable.yml
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([Pull Request](https://github.com/rails/rails/pull/29528))
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* Hash long stream identifiers when using PostgreSQL adapter.
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([Pull Request](https://github.com/rails/rails/pull/29297))
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Action Pack
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-----------
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Please refer to the [Changelog][action-pack] for detailed changes.
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### Removals
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* Remove deprecated `ActionController::ParamsParser::ParseError`.
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([Commit](https://github.com/rails/rails/commit/e16c765ac6dcff068ff2e5554d69ff345c003de1))
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### Deprecations
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* Deprecate `#success?`, `#missing?` and `#error?` aliases of
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`ActionDispatch::TestResponse`.
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([Pull Request](https://github.com/rails/rails/pull/30104))
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### Notable changes
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* Add support for recyclable cache keys with fragment caching.
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([Pull Request](https://github.com/rails/rails/pull/29092))
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* Change the cache key format for fragments to make it easier to debug key
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churn.
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([Pull Request](https://github.com/rails/rails/pull/29092))
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* AEAD encrypted cookies and sessions with GCM.
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([Pull Request](https://github.com/rails/rails/pull/28132))
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* Protect from forgery by default.
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([Pull Request](https://github.com/rails/rails/pull/29742))
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* Enforce signed/encrypted cookie expiry server side.
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([Pull Request](https://github.com/rails/rails/pull/30121))
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* Cookies `:expires` option supports `ActiveSupport::Duration` object.
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([Pull Request](https://github.com/rails/rails/pull/30121))
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* Use Capybara registered `:puma` server config.
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([Pull Request](https://github.com/rails/rails/pull/30638))
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* Simplify cookies middleware with key rotation support.
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([Pull Request](https://github.com/rails/rails/pull/29716))
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* Add ability to enable Early Hints for HTTP/2.
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([Pull Request](https://github.com/rails/rails/pull/30744))
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* Add headless chrome support to System Tests.
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([Pull Request](https://github.com/rails/rails/pull/30876))
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* Add `:allow_other_host` option to `redirect_back` method.
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([Pull Request](https://github.com/rails/rails/pull/30850))
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* Make `assert_recognizes` to traverse mounted engines.
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([Pull Request](https://github.com/rails/rails/pull/22435))
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* Add DSL for configuring Content-Security-Policy header.
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([Pull Request](https://github.com/rails/rails/pull/31162),
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[Commit](https://github.com/rails/rails/commit/619b1b6353a65e1635d10b8f8c6630723a5a6f1a),
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[Commit](https://github.com/rails/rails/commit/4ec8bf68ff92f35e79232fbd605012ce1f4e1e6e))
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* Register most popular audio/video/font mime types supported by modern
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browsers.
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([Pull Request](https://github.com/rails/rails/pull/31251))
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* Changed the default system test screenshot output from `inline` to `simple`.
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([Commit](https://github.com/rails/rails/commit/9d6e288ee96d6241f864dbf90211c37b14a57632))
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* Add headless firefox support to System Tests.
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([Pull Request](https://github.com/rails/rails/pull/31365))
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* Add secure `X-Download-Options` and `X-Permitted-Cross-Domain-Policies` to
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default headers set.
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([Commit](https://github.com/rails/rails/commit/5d7b70f4336d42eabfc403e9f6efceb88b3eff44))
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* Changed the system tests to set Puma as default server only when the
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user haven't specified manually another server.
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([Pull Request](https://github.com/rails/rails/pull/31384))
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* Add `Referrer-Policy` header to default headers set.
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([Commit](https://github.com/rails/rails/commit/428939be9f954d39b0c41bc53d85d0d106b9d1a1))
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* Matches behavior of `Hash#each` in `ActionController::Parameters#each`.
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([Pull Request](https://github.com/rails/rails/pull/27790))
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* Add support for automatic nonce generation for Rails UJS.
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([Commit](https://github.com/rails/rails/commit/b2f0a8945956cd92dec71ec4e44715d764990a49))
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* Update the default HSTS max-age value to 31536000 seconds (1 year)
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to meet the minimum max-age requirement for https://hstspreload.org/.
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([Commit](https://github.com/rails/rails/commit/30b5f469a1d30c60d1fb0605e84c50568ff7ed37))
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* Add alias method `to_hash` to `to_h` for `cookies`.
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Add alias method `to_h` to `to_hash` for `session`.
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([Commit](https://github.com/rails/rails/commit/50a62499e41dfffc2903d468e8b47acebaf9b500))
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Action View
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-----------
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Please refer to the [Changelog][action-view] for detailed changes.
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### Removals
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* Remove deprecated Erubis ERB handler.
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([Commit](https://github.com/rails/rails/commit/7de7f12fd140a60134defe7dc55b5a20b2372d06))
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### Deprecations
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* Deprecate `image_alt` helper which used to add default alt text to
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the images generated by `image_tag`.
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([Pull Request](https://github.com/rails/rails/pull/30213))
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### Notable changes
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* Add `:json` type to `auto_discovery_link_tag` to support
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[JSON Feeds](https://jsonfeed.org/version/1).
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([Pull Request](https://github.com/rails/rails/pull/29158))
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* Add `srcset` option to `image_tag` helper.
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([Pull Request](https://github.com/rails/rails/pull/29349))
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* Fix issues with `field_error_proc` wrapping `optgroup` and
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select divider `option`.
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([Pull Request](https://github.com/rails/rails/pull/31088))
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* Change `form_with` to generates ids by default.
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([Commit](https://github.com/rails/rails/commit/260d6f112a0ffdbe03e6f5051504cb441c1e94cd))
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* Add `preload_link_tag` helper.
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([Pull Request](https://github.com/rails/rails/pull/31251))
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* Allow the use of callable objects as group methods for grouped selects.
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([Pull Request](https://github.com/rails/rails/pull/31578))
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Action Mailer
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-------------
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Please refer to the [Changelog][action-mailer] for detailed changes.
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### Notable changes
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* Allow Action Mailer classes to configure their delivery job.
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([Pull Request](https://github.com/rails/rails/pull/29457))
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* Add `assert_enqueued_email_with` test helper.
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([Pull Request](https://github.com/rails/rails/pull/30695))
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Active Record
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-------------
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Please refer to the [Changelog][active-record] for detailed changes.
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### Removals
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* Remove deprecated `#migration_keys`.
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([Pull Request](https://github.com/rails/rails/pull/30337))
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* Remove deprecated support to `quoted_id` when typecasting
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an Active Record object.
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([Commit](https://github.com/rails/rails/commit/82472b3922bda2f337a79cef961b4760d04f9689))
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* Remove deprecated argument `default` from `index_name_exists?`.
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([Commit](https://github.com/rails/rails/commit/8f5b34df81175e30f68879479243fbce966122d7))
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* Remove deprecated support to passing a class to `:class_name`
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on associations.
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([Commit](https://github.com/rails/rails/commit/e65aff70696be52b46ebe57207ebd8bb2cfcdbb6))
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* Remove deprecated methods `initialize_schema_migrations_table` and
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`initialize_internal_metadata_table`.
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([Commit](https://github.com/rails/rails/commit/c9660b5777707658c414b430753029cd9bc39934))
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* Remove deprecated method `supports_migrations?`.
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([Commit](https://github.com/rails/rails/commit/9438c144b1893f2a59ec0924afe4d46bd8d5ffdd))
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* Remove deprecated method `supports_primary_key?`.
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([Commit](https://github.com/rails/rails/commit/c56ff22fc6e97df4656ddc22909d9bf8b0c2cbb1))
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* Remove deprecated method
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`ActiveRecord::Migrator.schema_migrations_table_name`.
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([Commit](https://github.com/rails/rails/commit/7df6e3f3cbdea9a0460ddbab445c81fbb1cfd012))
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* Remove deprecated argument `name` from `#indexes`.
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([Commit](https://github.com/rails/rails/commit/d6b779ecebe57f6629352c34bfd6c442ac8fba0e))
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* Remove deprecated arguments from `#verify!`.
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([Commit](https://github.com/rails/rails/commit/9c6ee1bed0292fc32c23dc1c68951ae64fc510be))
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* Remove deprecated configuration `.error_on_ignored_order_or_limit`.
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([Commit](https://github.com/rails/rails/commit/e1066f450d1a99c9a0b4d786b202e2ca82a4c3b3))
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* Remove deprecated method `#scope_chain`.
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([Commit](https://github.com/rails/rails/commit/ef7784752c5c5efbe23f62d2bbcc62d4fd8aacab))
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* Remove deprecated method `#sanitize_conditions`.
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([Commit](https://github.com/rails/rails/commit/8f5413b896099f80ef46a97819fe47a820417bc2))
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### Deprecations
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* Deprecate `supports_statement_cache?`.
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([Pull Request](https://github.com/rails/rails/pull/28938))
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* Deprecate passing arguments and block at the same time to
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`count` and `sum` in `ActiveRecord::Calculations`.
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([Pull Request](https://github.com/rails/rails/pull/29262))
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* Deprecate delegating to `arel` in `Relation`.
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([Pull Request](https://github.com/rails/rails/pull/29619))
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* Deprecate `set_state` method in `TransactionState`.
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([Commit](https://github.com/rails/rails/commit/608ebccf8f6314c945444b400a37c2d07f21b253))
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* Deprecate `expand_hash_conditions_for_aggregates` without replacement.
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([Commit](https://github.com/rails/rails/commit/7ae26885d96daee3809d0bd50b1a440c2f5ffb69))
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### Notable changes
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* When calling the dynamic fixture accessor method with no arguments, it now
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returns all fixtures of this type. Previously this method always returned
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an empty array.
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([Pull Request](https://github.com/rails/rails/pull/28692))
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* Fix inconsistency with changed attributes when overriding
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Active Record attribute reader.
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([Pull Request](https://github.com/rails/rails/pull/28661))
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* Support Descending Indexes for MySQL.
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([Pull Request](https://github.com/rails/rails/pull/28773))
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* Fix `bin/rails db:forward` first migration.
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([Commit](https://github.com/rails/rails/commit/b77d2aa0c336492ba33cbfade4964ba0eda3ef84))
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|
* Raise error `UnknownMigrationVersionError` on the movement of migrations
|
|
when the current migration does not exist.
|
|
([Commit](https://github.com/rails/rails/commit/bb9d6eb094f29bb94ef1f26aa44f145f17b973fe))
|
|
|
|
* Respect `SchemaDumper.ignore_tables` in rake tasks for
|
|
databases structure dump.
|
|
([Pull Request](https://github.com/rails/rails/pull/29077))
|
|
|
|
* Add `ActiveRecord::Base#cache_version` to support recyclable cache keys via
|
|
the new versioned entries in `ActiveSupport::Cache`. This also means that
|
|
`ActiveRecord::Base#cache_key` will now return a stable key that
|
|
does not include a timestamp any more.
|
|
([Pull Request](https://github.com/rails/rails/pull/29092))
|
|
|
|
* Prevent creation of bind param if casted value is nil.
|
|
([Pull Request](https://github.com/rails/rails/pull/29282))
|
|
|
|
* Use bulk INSERT to insert fixtures for better performance.
|
|
([Pull Request](https://github.com/rails/rails/pull/29504))
|
|
|
|
* Merging two relations representing nested joins no longer transforms
|
|
the joins of the merged relation into LEFT OUTER JOIN.
|
|
([Pull Request](https://github.com/rails/rails/pull/27063))
|
|
|
|
* Fix transactions to apply state to child transactions.
|
|
Previously, if you had a nested transaction and the outer transaction was
|
|
rolledback, the record from the inner transaction would still be marked
|
|
as persisted. It was fixed by applying the state of the parent
|
|
transaction to the child transaction when the parent transaction is
|
|
rolledback. This will correctly mark records from the inner transaction
|
|
as not persisted.
|
|
([Commit](https://github.com/rails/rails/commit/0237da287eb4c507d10a0c6d94150093acc52b03))
|
|
|
|
* Fix eager loading/preloading association with scope including joins.
|
|
([Pull Request](https://github.com/rails/rails/pull/29413))
|
|
|
|
* Prevent errors raised by `sql.active_record` notification subscribers
|
|
from being converted into `ActiveRecord::StatementInvalid` exceptions.
|
|
([Pull Request](https://github.com/rails/rails/pull/29692))
|
|
|
|
* Skip query caching when working with batches of records
|
|
(`find_each`, `find_in_batches`, `in_batches`).
|
|
([Commit](https://github.com/rails/rails/commit/b83852e6eed5789b23b13bac40228e87e8822b4d))
|
|
|
|
* Change sqlite3 boolean serialization to use 1 and 0.
|
|
SQLite natively recognizes 1 and 0 as true and false, but does not natively
|
|
recognize 't' and 'f' as was previously serialized.
|
|
([Pull Request](https://github.com/rails/rails/pull/29699))
|
|
|
|
* Values constructed using multi-parameter assignment will now use the
|
|
post-type-cast value for rendering in single-field form inputs.
|
|
([Commit](https://github.com/rails/rails/commit/1519e976b224871c7f7dd476351930d5d0d7faf6))
|
|
|
|
* `ApplicationRecord` is no longer generated when generating models. If you
|
|
need to generate it, it can be created with `rails g application_record`.
|
|
([Pull Request](https://github.com/rails/rails/pull/29916))
|
|
|
|
* `Relation#or` now accepts two relations who have different values for
|
|
`references` only, as `references` can be implicitly called by `where`.
|
|
([Commit](https://github.com/rails/rails/commit/ea6139101ccaf8be03b536b1293a9f36bc12f2f7))
|
|
|
|
* When using `Relation#or`, extract the common conditions and
|
|
put them before the OR condition.
|
|
([Pull Request](https://github.com/rails/rails/pull/29950))
|
|
|
|
* Add `binary` fixture helper method.
|
|
([Pull Request](https://github.com/rails/rails/pull/30073))
|
|
|
|
* Automatically guess the inverse associations for STI.
|
|
([Pull Request](https://github.com/rails/rails/pull/23425))
|
|
|
|
* Add new error class `LockWaitTimeout` which will be raised
|
|
when lock wait timeout exceeded.
|
|
([Pull Request](https://github.com/rails/rails/pull/30360))
|
|
|
|
* Update payload names for `sql.active_record` instrumentation to be
|
|
more descriptive.
|
|
([Pull Request](https://github.com/rails/rails/pull/30619))
|
|
|
|
* Use given algorithm while removing index from database.
|
|
([Pull Request](https://github.com/rails/rails/pull/24199))
|
|
|
|
* Passing a `Set` to `Relation#where` now behaves the same as passing
|
|
an array.
|
|
([Commit](https://github.com/rails/rails/commit/9cf7e3494f5bd34f1382c1ff4ea3d811a4972ae2))
|
|
|
|
* PostgreSQL `tsrange` now preserves subsecond precision.
|
|
([Pull Request](https://github.com/rails/rails/pull/30725))
|
|
|
|
* Raises when calling `lock!` in a dirty record.
|
|
([Commit](https://github.com/rails/rails/commit/63cf15877bae859ff7b4ebaf05186f3ca79c1863))
|
|
|
|
* Fixed a bug where column orders for an index weren't written to
|
|
`db/schema.rb` when using the sqlite adapter.
|
|
([Pull Request](https://github.com/rails/rails/pull/30970))
|
|
|
|
* Fix `bin/rails db:migrate` with specified `VERSION`.
|
|
`bin/rails db:migrate` with empty VERSION behaves as without `VERSION`.
|
|
Check a format of `VERSION`: Allow a migration version number
|
|
or name of a migration file. Raise error if format of `VERSION` is invalid.
|
|
Raise error if target migration doesn't exist.
|
|
([Pull Request](https://github.com/rails/rails/pull/30714))
|
|
|
|
* Add new error class `StatementTimeout` which will be raised
|
|
when statement timeout exceeded.
|
|
([Pull Request](https://github.com/rails/rails/pull/31129))
|
|
|
|
* `update_all` will now pass its values to `Type#cast` before passing them to
|
|
`Type#serialize`. This means that `update_all(foo: 'true')` will properly
|
|
persist a boolean.
|
|
([Commit](https://github.com/rails/rails/commit/68fe6b08ee72cc47263e0d2c9ff07f75c4b42761))
|
|
|
|
* Require raw SQL fragments to be explicitly marked when used in
|
|
relation query methods.
|
|
([Commit](https://github.com/rails/rails/commit/a1ee43d2170dd6adf5a9f390df2b1dde45018a48),
|
|
[Commit](https://github.com/rails/rails/commit/e4a921a75f8702a7dbaf41e31130fe884dea93f9))
|
|
|
|
* Add `#up_only` to database migrations for code that is only relevant when
|
|
migrating up, e.g. populating a new column.
|
|
([Pull Request](https://github.com/rails/rails/pull/31082))
|
|
|
|
* Add new error class `QueryCanceled` which will be raised
|
|
when canceling statement due to user request.
|
|
([Pull Request](https://github.com/rails/rails/pull/31235))
|
|
|
|
* Don't allow scopes to be defined which conflict with instance methods
|
|
on `Relation`.
|
|
([Pull Request](https://github.com/rails/rails/pull/31179))
|
|
|
|
* Add support for PostgreSQL operator classes to `add_index`.
|
|
([Pull Request](https://github.com/rails/rails/pull/19090))
|
|
|
|
* Log database query callers.
|
|
([Pull Request](https://github.com/rails/rails/pull/26815),
|
|
[Pull Request](https://github.com/rails/rails/pull/31519),
|
|
[Pull Request](https://github.com/rails/rails/pull/31690))
|
|
|
|
* Undefine attribute methods on descendants when resetting column information.
|
|
([Pull Request](https://github.com/rails/rails/pull/31475))
|
|
|
|
* Using subselect for `delete_all` with `limit` or `offset`.
|
|
([Commit](https://github.com/rails/rails/commit/9e7260da1bdc0770cf4ac547120c85ab93ff3d48))
|
|
|
|
* Fixed inconsistency with `first(n)` when used with `limit()`.
|
|
The `first(n)` finder now respects the `limit()`, making it consistent
|
|
with `relation.to_a.first(n)`, and also with the behavior of `last(n)`.
|
|
([Pull Request](https://github.com/rails/rails/pull/27597))
|
|
|
|
* Fix nested `has_many :through` associations on unpersisted parent instances.
|
|
([Commit](https://github.com/rails/rails/commit/027f865fc8b262d9ba3ee51da3483e94a5489b66))
|
|
|
|
* Take into account association conditions when deleting through records.
|
|
([Commit](https://github.com/rails/rails/commit/ae48c65e411e01c1045056562319666384bb1b63))
|
|
|
|
* Don't allow destroyed object mutation after `save` or `save!` is called.
|
|
([Commit](https://github.com/rails/rails/commit/562dd0494a90d9d47849f052e8913f0050f3e494))
|
|
|
|
* Fix relation merger issue with `left_outer_joins`.
|
|
([Pull Request](https://github.com/rails/rails/pull/27860))
|
|
|
|
* Support for PostgreSQL foreign tables.
|
|
([Pull Request](https://github.com/rails/rails/pull/31549))
|
|
|
|
* Clear the transaction state when an Active Record object is duped.
|
|
([Pull Request](https://github.com/rails/rails/pull/31751))
|
|
|
|
* Fix not expanded problem when passing an Array object as argument
|
|
to the where method using `composed_of` column.
|
|
([Pull Request](https://github.com/rails/rails/pull/31724))
|
|
|
|
* Make `reflection.klass` raise if `polymorphic?` not to be misused.
|
|
([Commit](https://github.com/rails/rails/commit/63fc1100ce054e3e11c04a547cdb9387cd79571a))
|
|
|
|
* Fix `#columns_for_distinct` of MySQL and PostgreSQL to make
|
|
`ActiveRecord::FinderMethods#limited_ids_for` use correct primary key values
|
|
even if `ORDER BY` columns include other table's primary key.
|
|
([Commit](https://github.com/rails/rails/commit/851618c15750979a75635530200665b543561a44))
|
|
|
|
* Fix `dependent: :destroy` issue for has_one/belongs_to relationship where
|
|
the parent class was getting deleted when the child was not.
|
|
([Commit](https://github.com/rails/rails/commit/b0fc04aa3af338d5a90608bf37248668d59fc881))
|
|
|
|
Active Model
|
|
------------
|
|
|
|
Please refer to the [Changelog][active-model] for detailed changes.
|
|
|
|
### Notable changes
|
|
|
|
* Fix methods `#keys`, `#values` in `ActiveModel::Errors`.
|
|
Change `#keys` to only return the keys that don't have empty messages.
|
|
Change `#values` to only return the not empty values.
|
|
([Pull Request](https://github.com/rails/rails/pull/28584))
|
|
|
|
* Add method `#merge!` for `ActiveModel::Errors`.
|
|
([Pull Request](https://github.com/rails/rails/pull/29714))
|
|
|
|
* Allow passing a Proc or Symbol to length validator options.
|
|
([Pull Request](https://github.com/rails/rails/pull/30674))
|
|
|
|
* Execute `ConfirmationValidator` validation when `_confirmation`'s value
|
|
is `false`.
|
|
([Pull Request](https://github.com/rails/rails/pull/31058))
|
|
|
|
* Models using the attributes API with a proc default can now be marshalled.
|
|
([Commit](https://github.com/rails/rails/commit/0af36c62a5710e023402e37b019ad9982e69de4b))
|
|
|
|
* Do not lose all multiple `:includes` with options in serialization.
|
|
([Commit](https://github.com/rails/rails/commit/853054bcc7a043eea78c97e7705a46abb603cc44))
|
|
|
|
Active Support
|
|
--------------
|
|
|
|
Please refer to the [Changelog][active-support] for detailed changes.
|
|
|
|
### Removals
|
|
|
|
* Remove deprecated `:if` and `:unless` string filter for callbacks.
|
|
([Commit](https://github.com/rails/rails/commit/c792354adcbf8c966f274915c605c6713b840548))
|
|
|
|
* Remove deprecated `halt_callback_chains_on_return_false` option.
|
|
([Commit](https://github.com/rails/rails/commit/19fbbebb1665e482d76cae30166b46e74ceafe29))
|
|
|
|
### Deprecations
|
|
|
|
* Deprecate `Module#reachable?` method.
|
|
([Pull Request](https://github.com/rails/rails/pull/30624))
|
|
|
|
* Deprecate `secrets.secret_token`.
|
|
([Commit](https://github.com/rails/rails/commit/fbcc4bfe9a211e219da5d0bb01d894fcdaef0a0e))
|
|
|
|
### Notable changes
|
|
|
|
* Add `fetch_values` for `HashWithIndifferentAccess`.
|
|
([Pull Request](https://github.com/rails/rails/pull/28316))
|
|
|
|
* Add support for `:offset` to `Time#change`.
|
|
([Commit](https://github.com/rails/rails/commit/851b7f866e13518d900407c78dcd6eb477afad06))
|
|
|
|
* Add support for `:offset` and `:zone`
|
|
to `ActiveSupport::TimeWithZone#change`.
|
|
([Commit](https://github.com/rails/rails/commit/851b7f866e13518d900407c78dcd6eb477afad06))
|
|
|
|
* Pass gem name and deprecation horizon to deprecation notifications.
|
|
([Pull Request](https://github.com/rails/rails/pull/28800))
|
|
|
|
* Add support for versioned cache entries. This enables the cache stores to
|
|
recycle cache keys, greatly saving on storage in cases with frequent churn.
|
|
Works together with the separation of `#cache_key` and `#cache_version`
|
|
in Active Record and its use in Action Pack's fragment caching.
|
|
([Pull Request](https://github.com/rails/rails/pull/29092))
|
|
|
|
* Add `ActiveSupport::CurrentAttributes` to provide a thread-isolated
|
|
attributes singleton. Primary use case is keeping all the per-request
|
|
attributes easily available to the whole system.
|
|
([Pull Request](https://github.com/rails/rails/pull/29180))
|
|
|
|
* `#singularize` and `#pluralize` now respect uncountables for
|
|
the specified locale.
|
|
([Commit](https://github.com/rails/rails/commit/352865d0f835c24daa9a2e9863dcc9dde9e5371a))
|
|
|
|
* Add default option to `class_attribute`.
|
|
([Pull Request](https://github.com/rails/rails/pull/29270))
|
|
|
|
* Add `Date#prev_occurring` and `Date#next_occurring` to return
|
|
specified next/previous occurring day of week.
|
|
([Pull Request](https://github.com/rails/rails/pull/26600))
|
|
|
|
* Add default option to module and class attribute accessors.
|
|
([Pull Request](https://github.com/rails/rails/pull/29294))
|
|
|
|
* Cache: `write_multi`.
|
|
([Pull Request](https://github.com/rails/rails/pull/29366))
|
|
|
|
* Default `ActiveSupport::MessageEncryptor` to use AES 256 GCM encryption.
|
|
([Pull Request](https://github.com/rails/rails/pull/29263))
|
|
|
|
* Add `freeze_time` helper which freezes time to `Time.now` in tests.
|
|
([Pull Request](https://github.com/rails/rails/pull/29681))
|
|
|
|
* Make the order of `Hash#reverse_merge!` consistent
|
|
with `HashWithIndifferentAccess`.
|
|
([Pull Request](https://github.com/rails/rails/pull/28077))
|
|
|
|
* Add purpose and expiry support to `ActiveSupport::MessageVerifier` and
|
|
`ActiveSupport::MessageEncryptor`.
|
|
([Pull Request](https://github.com/rails/rails/pull/29892))
|
|
|
|
* Update `String#camelize` to provide feedback when wrong option is passed.
|
|
([Pull Request](https://github.com/rails/rails/pull/30039))
|
|
|
|
* `Module#delegate_missing_to` now raises `DelegationError` if target is nil,
|
|
similar to `Module#delegate`.
|
|
([Pull Request](https://github.com/rails/rails/pull/30191))
|
|
|
|
* Add `ActiveSupport::EncryptedFile` and
|
|
`ActiveSupport::EncryptedConfiguration`.
|
|
([Pull Request](https://github.com/rails/rails/pull/30067))
|
|
|
|
* Add `config/credentials.yml.enc` to store production app secrets.
|
|
([Pull Request](https://github.com/rails/rails/pull/30067))
|
|
|
|
* Add key rotation support to `MessageEncryptor` and `MessageVerifier`.
|
|
([Pull Request](https://github.com/rails/rails/pull/29716))
|
|
|
|
* Return an instance of `HashWithIndifferentAccess` from
|
|
`HashWithIndifferentAccess#transform_keys`.
|
|
([Pull Request](https://github.com/rails/rails/pull/30728))
|
|
|
|
* `Hash#slice` now falls back to Ruby 2.5+'s built-in definition if defined.
|
|
([Commit](https://github.com/rails/rails/commit/01ae39660243bc5f0a986e20f9c9bff312b1b5f8))
|
|
|
|
* `IO#to_json` now returns the `to_s` representation, rather than
|
|
attempting to convert to an array. This fixes a bug where `IO#to_json`
|
|
would raise an `IOError` when called on an unreadable object.
|
|
([Pull Request](https://github.com/rails/rails/pull/30953))
|
|
|
|
* Add same method signature for `Time#prev_day` and `Time#next_day`
|
|
in accordance with `Date#prev_day`, `Date#next_day`.
|
|
Allows pass argument for `Time#prev_day` and `Time#next_day`.
|
|
([Commit](https://github.com/rails/rails/commit/61ac2167eff741bffb44aec231f4ea13d004134e))
|
|
|
|
* Add same method signature for `Time#prev_month` and `Time#next_month`
|
|
in accordance with `Date#prev_month`, `Date#next_month`.
|
|
Allows pass argument for `Time#prev_month` and `Time#next_month`.
|
|
([Commit](https://github.com/rails/rails/commit/f2c1e3a793570584d9708aaee387214bc3543530))
|
|
|
|
* Add same method signature for `Time#prev_year` and `Time#next_year`
|
|
in accordance with `Date#prev_year`, `Date#next_year`.
|
|
Allows pass argument for `Time#prev_year` and `Time#next_year`.
|
|
([Commit](https://github.com/rails/rails/commit/ee9d81837b5eba9d5ec869ae7601d7ffce763e3e))
|
|
|
|
* Fix acronym support in `humanize`.
|
|
([Commit](https://github.com/rails/rails/commit/0ddde0a8fca6a0ca3158e3329713959acd65605d))
|
|
|
|
* Allow `Range#include?` on TWZ ranges.
|
|
([Pull Request](https://github.com/rails/rails/pull/31081))
|
|
|
|
* Cache: Enable compression by default for values > 1kB.
|
|
([Pull Request](https://github.com/rails/rails/pull/31147))
|
|
|
|
* Redis cache store.
|
|
([Pull Request](https://github.com/rails/rails/pull/31134),
|
|
[Pull Request](https://github.com/rails/rails/pull/31866))
|
|
|
|
* Handle `TZInfo::AmbiguousTime` errors.
|
|
([Pull Request](https://github.com/rails/rails/pull/31128))
|
|
|
|
* MemCacheStore: Support expiring counters.
|
|
([Commit](https://github.com/rails/rails/commit/b22ee64b5b30c6d5039c292235e10b24b1057f6d))
|
|
|
|
* Make `ActiveSupport::TimeZone.all` return only time zones that are in
|
|
`ActiveSupport::TimeZone::MAPPING`.
|
|
([Pull Request](https://github.com/rails/rails/pull/31176))
|
|
|
|
* Changed default behaviour of `ActiveSupport::SecurityUtils.secure_compare`,
|
|
to make it not leak length information even for variable length string.
|
|
Renamed old `ActiveSupport::SecurityUtils.secure_compare` to
|
|
`fixed_length_secure_compare`, and started raising `ArgumentError` in
|
|
case of length mismatch of passed strings.
|
|
([Pull Request](https://github.com/rails/rails/pull/24510))
|
|
|
|
* Use SHA-1 to generate non-sensitive digests, such as the ETag header.
|
|
([Pull Request](https://github.com/rails/rails/pull/31289),
|
|
[Pull Request](https://github.com/rails/rails/pull/31651))
|
|
|
|
* `assert_changes` will always assert that the expression changes,
|
|
regardless of `from:` and `to:` argument combinations.
|
|
([Pull Request](https://github.com/rails/rails/pull/31011))
|
|
|
|
* Add missing instrumentation for `read_multi`
|
|
in `ActiveSupport::Cache::Store`.
|
|
([Pull Request](https://github.com/rails/rails/pull/30268))
|
|
|
|
* Support hash as first argument in `assert_difference`.
|
|
This allows to specify multiple numeric differences in the same assertion.
|
|
([Pull Request](https://github.com/rails/rails/pull/31600))
|
|
|
|
* Caching: MemCache and Redis `read_multi` and `fetch_multi` speedup.
|
|
Read from the local in-memory cache before consulting the backend.
|
|
([Commit](https://github.com/rails/rails/commit/a2b97e4ffef971607a1be8fc7909f099b6840f36))
|
|
|
|
Active Job
|
|
----------
|
|
|
|
Please refer to the [Changelog][active-job] for detailed changes.
|
|
|
|
### Notable changes
|
|
|
|
* Allow block to be passed to `ActiveJob::Base.discard_on` to allow custom
|
|
handling of discard jobs.
|
|
([Pull Request](https://github.com/rails/rails/pull/30622))
|
|
|
|
Ruby on Rails Guides
|
|
--------------------
|
|
|
|
Please refer to the [Changelog][guides] for detailed changes.
|
|
|
|
### Notable changes
|
|
|
|
* Add
|
|
[Threading and Code Execution in Rails](threading_and_code_execution.html)
|
|
Guide.
|
|
([Pull Request](https://github.com/rails/rails/pull/27494))
|
|
|
|
* Add [Active Storage Overview](active_storage_overview.html) Guide.
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([Pull Request](https://github.com/rails/rails/pull/31037))
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Credits
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-------
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See the
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[full list of contributors to Rails](http://contributors.rubyonrails.org/)
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for the many people who spent many hours making Rails, the stable and robust
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framework it is. Kudos to all of them.
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[railties]: https://github.com/rails/rails/blob/5-2-stable/railties/CHANGELOG.md
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[action-pack]: https://github.com/rails/rails/blob/5-2-stable/actionpack/CHANGELOG.md
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[action-view]: https://github.com/rails/rails/blob/5-2-stable/actionview/CHANGELOG.md
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[action-mailer]: https://github.com/rails/rails/blob/5-2-stable/actionmailer/CHANGELOG.md
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[action-cable]: https://github.com/rails/rails/blob/5-2-stable/actioncable/CHANGELOG.md
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[active-record]: https://github.com/rails/rails/blob/5-2-stable/activerecord/CHANGELOG.md
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[active-model]: https://github.com/rails/rails/blob/5-2-stable/activemodel/CHANGELOG.md
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[active-support]: https://github.com/rails/rails/blob/5-2-stable/activesupport/CHANGELOG.md
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[active-job]: https://github.com/rails/rails/blob/5-2-stable/activejob/CHANGELOG.md
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[guides]: https://github.com/rails/rails/blob/5-2-stable/guides/CHANGELOG.md
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