* Introduce guard against DNS rebinding attacks The `ActionDispatch::HostAuthorization` is a new middleware that prevent against DNS rebinding and other `Host` header attacks. It is included in the development environment by default with the following configuration: Rails.application.config.hosts = [ IPAddr.new("0.0.0.0/0"), # All IPv4 addresses. IPAddr.new("::/0"), # All IPv6 addresses. "localhost" # The localhost reserved domain. ] In other environments `Rails.application.config.hosts` is empty and no `Host` header checks will be done. If you want to guard against header attacks on production, you have to manually whitelist the allowed hosts with: Rails.application.config.hosts << "product.com" The host of a request is checked against the `hosts` entries with the case operator (`#===`), which lets `hosts` support entries of type `RegExp`, `Proc` and `IPAddr` to name a few. Here is an example with a regexp. # Allow requests from subdomains like `www.product.com` and # `beta1.product.com`. Rails.application.config.hosts << /.*\.product\.com/ A special case is supported that allows you to whitelist all sub-domains: # Allow requests from subdomains like `www.product.com` and # `beta1.product.com`. Rails.application.config.hosts << ".product.com" *Genadi Samokovarov* * Remove redundant suffixes on generated helpers. *Gannon McGibbon* * Remove redundant suffixes on generated integration tests. *Gannon McGibbon* * Fix boolean interaction in scaffold system tests. *Gannon McGibbon* * Remove redundant suffixes on generated system tests. *Gannon McGibbon* * Add an `abort_on_failure` boolean option to the generator method that shell out (`generate`, `rake`, `rails_command`) to abort the generator if the command fails. *David Rodríguez* * Remove `app/assets` and `app/javascript` from `eager_load_paths` and `autoload_paths`. *Gannon McGibbon* * Add JSON support to rails properties route (`/rails/info/properties`). Now, `Rails::Info` properties may be accessed in JSON format at `/rails/info/properties.json`. *Yoshiyuki Hirano* * Use Ids instead of memory addresses when displaying references in scaffold views. Fixes #29200. *Rasesh Patel* * Adds support for multiple databases to `rails db:migrate:status`. Subtasks are also added to get the status of individual databases (eg. `rails db:migrate:status:animals`). *Gannon McGibbon* * Use Webpacker by default to manage app-level JavaScript through the new app/javascript directory. Sprockets is now solely in charge, by default, of compiling CSS and other static assets. Action Cable channel generators will create ES6 stubs rather than use CoffeeScript. Active Storage, Action Cable, Turbolinks, and Rails-UJS are loaded by a new application.js pack. Generators no longer generate JavaScript stubs. *DHH*, *Lachlan Sylvester* * Add `database` (aliased as `db`) option to model generator to allow setting the database. This is useful for applications that use multiple databases and put migrations per database in their own directories. ``` bin/rails g model Room capacity:integer --database=kingston invoke active_record create db/kingston_migrate/20180830151055_create_rooms.rb ``` Because rails scaffolding uses the model generator, you can also specify a database with the scaffold generator. *Gannon McGibbon* * Raise an error when "recyclable cache keys" are being used by a cache store that does not explicitly support it. Custom cache keys that do support this feature can bypass this error by implementing the `supports_cache_versioning?` method on their class and returning a truthy value. *Richard Schneeman* * Support environment specific credentials file. For `production` environment look first for `config/credentials/production.yml.enc` file that can be decrypted by `ENV["RAILS_MASTER_KEY"]` or `config/credentials/production.key` master key. Edit given environment credentials file by command `rails credentials:edit --environment production`. Default paths can be overwritten by setting `config.credentials.content_path` and `config.credentials.key_path`. *Wojciech Wnętrzak* * Make `ActiveSupport::Cache::NullStore` the default cache store in the test environment. *Michael C. Nelson* * Emit warning for unknown inflection rule when generating model. *Yoshiyuki Kinjo* * Add `database` (aliased as `db`) option to migration generator. If you're using multiple databases and have a folder for each database for migrations (ex db/migrate and db/new_db_migrate) you can now pass the `--database` option to the generator to make sure the the migration is inserted into the correct folder. ``` rails g migration CreateHouses --database=kingston invoke active_record create db/kingston_migrate/20180830151055_create_houses.rb ``` *Eileen M. Uchitelle* * Deprecate `rake routes` in favor of `rails routes`. *Yuji Yaginuma* * Deprecate `rake initializers` in favor of `rails initializers`. *Annie-Claude Côté* * Deprecate `rake dev:cache` in favor of `rails dev:cache`. *Annie-Claude Côté* * Deprecate `rails notes` subcommands in favor of passing an `annotations` argument to `rails notes`. The following subcommands are replaced by passing `--annotations` or `-a` to `rails notes`: - `rails notes:custom ANNOTATION=custom` is deprecated in favor of using `rails notes -a custom`. - `rails notes:optimize` is deprecated in favor of using `rails notes -a OPTIMIZE`. - `rails notes:todo` is deprecated in favor of using`rails notes -a TODO`. - `rails notes:fixme` is deprecated in favor of using `rails notes -a FIXME`. *Annie-Claude Côté* * Deprecate `SOURCE_ANNOTATION_DIRECTORIES` environment variable used by `rails notes` through `Rails::SourceAnnotationExtractor::Annotation` in favor of using `config.annotations.register_directories`. *Annie-Claude Côté* * Deprecate `rake notes` in favor of `rails notes`. *Annie-Claude Côté* * Don't generate unused files in `app:update` task. Skip the assets' initializer when sprockets isn't loaded. Skip `config/spring.rb` when spring isn't loaded. Skip yarn's contents when yarn integration isn't used. *Tsukuru Tanimichi* * Make the master.key file read-only for the owner upon generation on POSIX-compliant systems. Previously: $ ls -l config/master.key -rw-r--r-- 1 owner group 32 Jan 1 00:00 master.key Now: $ ls -l config/master.key -rw------- 1 owner group 32 Jan 1 00:00 master.key Fixes #32604. *Jose Luis Duran* * Deprecate support for using the `HOST` environment to specify the server IP. The `BINDING` environment should be used instead. Fixes #29516. *Yuji Yaginuma* * Deprecate passing Rack server name as a regular argument to `rails server`. Previously: $ bin/rails server thin There wasn't an explicit option for the Rack server to use, now we have the `--using` option with the `-u` short switch. Now: $ bin/rails server -u thin This change also improves the error message if a missing or mistyped rack server is given. *Genadi Samokovarov* * Add "rails routes --expanded" option to output routes in expanded mode like "psql --expanded". Result looks like: ``` $ rails routes --expanded --[ Route 1 ]------------------------------------------------------------ Prefix | high_scores Verb | GET URI | /high_scores(.:format) Controller#Action | high_scores#index --[ Route 2 ]------------------------------------------------------------ Prefix | new_high_score Verb | GET URI | /high_scores/new(.:format) Controller#Action | high_scores#new ``` *Benoit Tigeot* * Rails 6 requires Ruby 2.4.1 or newer. *Jeremy Daer* Please check [5-2-stable](https://github.com/rails/rails/blob/5-2-stable/railties/CHANGELOG.md) for previous changes.