rails--rails/actionpack/CHANGELOG.md

*   When a `respond_to` collector with a block doesn't have a response, then
    a `:no_content` response should be rendered.  This brings the default
    rendering behavior introduced by https://github.com/rails/rails/issues/19036
    to controller methods employing `respond_to`

    *Justin Coyne*

*   Add `ActionController::Parameters#dig` on Ruby 2.3 and greater, which
    behaves the same as `Hash#dig`.

    *Sean Griffin*

*   Add request headers in the payload of the `start_processing.action_controller`
    and `process_action.action_controller` notifications.

    *Gareth du Plooy*

*   Add `action_dispatch_integration_test` load hook. The hook can be used to
    extend `ActionDispatch::IntegrationTest` once it has been loaded.

    *Yuichiro Kaneko*

*   Update default rendering policies when the controller action did
    not explicitly indicate a response.

    For API controllers, the implicit render always renders "204 No Content"
    and does not account for any templates.

    For other controllers, the following conditions are checked:

    First, if a template exists for the controller action, it is rendered.
    This template lookup takes into account the action name, locales, format,
    variant, template handlers, etc. (see +render+ for details).

    Second, if other templates exist for the controller action but is not in
    the right format (or variant, etc.), an <tt>ActionController::UnknownFormat</tt>
    is raised. The list of available templates is assumed to be a complete
    enumeration of all the possible formats (or variants, etc.); that is,
    having only HTML and JSON templates indicate that the controller action is
    not meant to handle XML requests.

    Third, if the current request is an "interactive" browser request (the user
    navigated here by entering the URL in the address bar, submiting a form,
    clicking on a link, etc. as opposed to an XHR or non-browser API request),
    <tt>ActionView::UnknownFormat</tt> is raised to display a helpful error
    message.

    Finally, it falls back to the same "204 No Content" behavior as API controllers.

    *Godfrey Chan*, *Jon Moss*, *Kasper Timm Hansen*, *Mike Clark*, *Matthew Draper*

## Rails 5.0.0.beta3 (February 24, 2016) ##

*   Add application/gzip as a default mime type.

    *Mehmet Emin İNAÇ*

*   Add request encoding and response parsing to integration tests.

    What previously was:

    ```ruby
    require 'test_helper'

    class ApiTest < ActionDispatch::IntegrationTest
      test 'creates articles' do
        assert_difference -> { Article.count } do
          post articles_path(format: :json),
            params: { article: { title: 'Ahoy!' } }.to_json,
            headers: { 'Content-Type' => 'application/json' }
        end

        assert_equal({ 'id' => Article.last.id, 'title' => 'Ahoy!' }, JSON.parse(response.body))
      end
    end
    ```

    Can now be written as:

    ```ruby
    require 'test_helper'

    class ApiTest < ActionDispatch::IntegrationTest
      test 'creates articles' do
        assert_difference -> { Article.count } do
          post articles_path, params: { article: { title: 'Ahoy!' } }, as: :json
        end

        assert_equal({ 'id' => Article.last.id, 'title' => 'Ahoy!' }, response.parsed_body)
      end
    end
    ```

    Passing `as: :json` to integration test request helpers will set the format,
    content type and encode the parameters as JSON.

    Then on the response side, `parsed_body` will parse the body according to the
    content type the response has.

    Currently JSON is the only supported MIME type. Add your own with
    `ActionDispatch::IntegrationTest.register_encoder`.

    *Kasper Timm Hansen*

*   Add image/svg+xml as a default mime type.

    *DHH*

## Rails 5.0.0.beta2 (February 01, 2016) ##

*   Add `-g` and `-c` options to `bin/rails routes`. These options return the url `name`, `verb` and
    `path` field that match the pattern or match a specific controller.

    Deprecate `CONTROLLER` env variable in `bin/rails routes`.

    See #18902.

    *Anton Davydov* & *Vipul A M*

*   Response etags to always be weak: Prefixes 'W/' to value returned by
   `ActionDispatch::Http::Cache::Response#etag=`, such that etags set in
   `fresh_when` and `stale?` are weak.

    Fixes #17556.

    *Abhishek Yadav*

*   Provide the name of HTTP Status code in assertions.

    *Sean Collins*

*   More explicit error message when running `rake routes`. `CONTROLLER` argument
    can now be supplied in different ways:
    `Rails::WelcomeController`, `Rails::Welcome`, `rails/welcome`.

    Fixes #22918.

    *Edouard Chin*

*   Allow `ActionController::Parameters` instances as an argument to URL
    helper methods. An `ArgumentError` will be raised if the passed parameters
    are not secure.

    Fixes #22832.

    *Prathamesh Sonpatki*

*   Add option for per-form CSRF tokens.

    *Greg Ose & Ben Toews*

*   Add tests and documentation for `ActionController::Renderers::use_renderers`.

    *Benjamin Fleischer*

*   Fix `ActionController::Parameters#convert_parameters_to_hashes` to return filtered
    or unfiltered values based on from where it is called, `to_h` or `to_unsafe_h`
    respectively.

    Fixes #22841.

    *Prathamesh Sonpatki*

*   Add `ActionController::Parameters#include?`

    *Justin Coyne*

## Rails 5.0.0.beta1 (December 18, 2015) ##

*   Deprecate `redirect_to :back` in favor of `redirect_back`, which accepts a
    required `fallback_location` argument, thus eliminating the possibility of a
    `RedirectBackError`.

    *Derek Prior*

*   Add `redirect_back` method to `ActionController::Redirecting` to provide a
    way to safely redirect to the `HTTP_REFERER` if it is present, falling back
    to a provided redirect otherwise.

    *Derek Prior*

*   `ActionController::TestCase` will be moved to it's own gem in Rails 5.1

    With the speed improvements made to `ActionDispatch::IntegrationTest` we no
    longer need to keep two separate code bases for testing controllers. In
    Rails 5.1 `ActionController::TestCase` will be deprecated and moved into a
    gem outside of Rails source.

    This is a documentation deprecation so that going forward so new tests will use
    `ActionDispatch::IntegrationTest` instead of `ActionController::TestCase`.

    *Eileen M. Uchitelle*

*   Add a `response_format` option to `ActionDispatch::DebugExceptions`
    to configure the format of the response when errors occur in
    development mode.

    If `response_format` is `:default` the debug info will be rendered
    in an HTML page. In the other hand, if the provided value is `:api`
    the debug info will be rendered in the original response format.

    *Jorge Bejar*

*   Change the `protect_from_forgery` prepend default to `false`.

    Per this comment
    https://github.com/rails/rails/pull/18334#issuecomment-69234050 we want
    `protect_from_forgery` to default to `prepend: false`.

    `protect_from_forgery` will now be inserted into the callback chain at the
    point it is called in your application. This is useful for cases where you
    want to `protect_from_forgery` after you perform required authentication
    callbacks or other callbacks that are required to run after forgery protection.

    If you want `protect_from_forgery` callbacks to always run first, regardless of
    position they are called in your application then you can add `prepend: true`
    to your `protect_from_forgery` call.

    Example:

    ```ruby
    protect_from_forgery prepend: true
    ```

    *Eileen M. Uchitelle*

*   In url_for, never append a question mark to the URL when the query string
    is empty anyway.  (It used to do that when called like `url_for(controller:
    'x', action: 'y', q: {})`.)

    *Paul Grayson*

*   Catch invalid UTF-8 querystring values and respond with BadRequest

    Check querystring params for invalid UTF-8 characters, and raise an
    ActionController::BadRequest error if present. Previously these strings
    would typically trigger errors further down the stack.

    *Grey Baker*

*   Parse RSS/ATOM responses as XML, not HTML.

    *Alexander Kaupanin*

*   Show helpful message in `BadRequest` exceptions due to invalid path
    parameter encodings.

    Fixes #21923.

    *Agis Anastasopoulos*

*   Add the ability of returning arbitrary headers to `ActionDispatch::Static`.

    Now ActionDispatch::Static can accept HTTP headers so that developers
    will have control of returning arbitrary headers like
    'Access-Control-Allow-Origin' when a response is delivered. They can be
    configured with `#config`:

    Example:

        config.public_file_server.headers = {
          "Cache-Control"               => "public, max-age=60",
          "Access-Control-Allow-Origin" => "http://rubyonrails.org"
        }

    *Yuki Nishijima*

*   Allow multiple `root` routes in same scope level. Example:

    Example:

        root 'blog#show', constraints: ->(req) { Hostname.blog_site?(req.host) }
        root 'landing#show'

    *Rafael Sales*

*   Fix regression in mounted engine named routes generation for app deployed to
    a subdirectory. `relative_url_root` was prepended to the path twice (e.g.
    "/subdir/subdir/engine_path" instead of "/subdir/engine_path")

    Fixes #20920. Fixes #21459.

    *Matthew Erhard*

*   `ActionDispatch::Response#new` no longer applies default headers. If you want
    default headers applied to the response object, then call
    `ActionDispatch::Response.create`. This change only impacts people who are
    directly constructing an `ActionDispatch::Response` object.

*   Accessing mime types via constants like `Mime::HTML` is deprecated. Please
    change code like this:

        Mime::HTML

    To this:

        Mime[:html]

    This change is so that Rails will not manage a list of constants, and fixes
    an issue where if a type isn't registered you could possibly get the wrong
    object.

    `Mime[:html]` is available in older versions of Rails, too, so you can
    safely change libraries and plugins and maintain compatibility with
    multiple versions of Rails.

*   `url_for` does not modify its arguments when generating polymorphic URLs.

    *Bernerd Schaefer*

*   Make it easier to opt in to `config.force_ssl` and `config.ssl_options` by
    making them less dangerous to try and easier to disable.

    SSL redirect:
      * Move `:host` and `:port` options within `redirect: { … }`. Deprecate.
      * Introduce `:status` and `:body` to customize the redirect response.
        The 301 permanent default makes it difficult to test the redirect and
        back out of it since browsers remember the 301. Test with a 302 or 307
        instead, then switch to 301 once you're confident that all is well.

    HTTP Strict Transport Security (HSTS):
      * Shorter max-age. Shorten the default max-age from 1 year to 180 days,
        the low end for https://www.ssllabs.com/ssltest/ grading and greater
        than the 18-week minimum to qualify for browser preload lists.
      * Disabling HSTS. Setting `hsts: false` now sets `hsts { expires: 0 }`
        instead of omitting the header. Omitting does nothing to disable HSTS
        since browsers hang on to your previous settings until they expire.
        Sending `{ hsts: { expires: 0 }}` flushes out old browser settings and
        actually disables HSTS:
          http://tools.ietf.org/html/rfc6797#section-6.1.1
      * HSTS Preload. Introduce `preload: true` to set the `preload` flag,
        indicating that your site may be included in browser preload lists,
        including Chrome, Firefox, Safari, IE11, and Edge. Submit your site:
          https://hstspreload.appspot.com

    *Jeremy Daer*

*   Update `ActionController::TestSession#fetch` to behave more like
    `ActionDispatch::Request::Session#fetch` when using non-string keys.

    *Jeremy Friesen*

*   Using strings or symbols for middleware class names is deprecated. Convert
    things like this:

      middleware.use "Foo::Bar"

    to this:

      middleware.use Foo::Bar

*   `ActionController::TestSession` now accepts a default value as well as
    a block for generating a default value based off the key provided.

    This fixes calls to `session#fetch` in `ApplicationController` instances that
    take more two arguments or a block from raising `ArgumentError: wrong
    number of arguments (2 for 1)` when performing controller tests.

    *Matthew Gerrior*

*   Fix `ActionController::Parameters#fetch` overwriting `KeyError` returned by
    default block.

    *Jonas Schuber Erlandsson*, *Roque Pinel*

*   `ActionController::Parameters` no longer inherits from
    `HashWithIndifferentAccess`

    Inheriting from `HashWithIndifferentAccess` allowed users to call any
    enumerable methods on `Parameters` object, resulting in a risk of losing the
    `permitted?` status or even getting back a pure `Hash` object instead of
    a `Parameters` object with proper sanitization.

    By not inheriting from `HashWithIndifferentAccess`, we are able to make
    sure that all methods that are defined in `Parameters` object will return
    a proper `Parameters` object with a correct `permitted?` flag.

    *Prem Sichanugrist*

*   Replaced `ActiveSupport::Concurrency::Latch` with `Concurrent::CountDownLatch`
    from the concurrent-ruby gem.

    *Jerry D'Antonio*

*   Add ability to filter parameters based on parent keys.

        # matches {credit_card: {code: "xxxx"}}
        # doesn't match {file: { code: "xxxx"}}
        config.filter_parameters += [ "credit_card.code" ]

    See #13897.

    *Guillaume Malette*

*   Deprecate passing first parameter as `Hash` and default status code for `head` method.

    *Mehmet Emin İNAÇ*

*   Adds`Rack::Utils::ParameterTypeError` and `Rack::Utils::InvalidParameterError`
    to the rescue_responses hash in `ExceptionWrapper` (Rack recommends
    integrators serve 400s for both of these).

    *Grey Baker*

*   Add support for API only apps.
    `ActionController::API` is added as a replacement of
    `ActionController::Base` for this kind of applications.

    *Santiago Pastorino*, *Jorge Bejar*

*   Remove `assigns` and `assert_template`. Both methods have been extracted
    into a gem at https://github.com/rails/rails-controller-testing.

    See #18950.

    *Alan Guo Xiang Tan*

*   `FileHandler` and `Static` middleware initializers accept `index` argument
    to configure the directory index file name. Defaults to `index` (as in
    `index.html`).

    See #20017.

    *Eliot Sykes*

*   Deprecate `:nothing` option for `render` method.

    *Mehmet Emin İNAÇ*

*   Fix `rake routes` not showing the right format when
    nesting multiple routes.

    See #18373.

    *Ravil Bayramgalin*

*   Add ability to override default form builder for a controller.

        class AdminController < ApplicationController
          default_form_builder AdminFormBuilder
        end

    *Kevin McPhillips*

*   For actions with no corresponding templates, render `head :no_content`
    instead of raising an error. This allows for slimmer API controller
    methods that simply work, without needing further instructions.

    See #19036.

    *Stephen Bussey*

*   Provide friendlier access to request variants.

        request.variant = :phone
        request.variant.phone?  # true
        request.variant.tablet? # false

        request.variant = [:phone, :tablet]
        request.variant.phone?                  # true
        request.variant.desktop?                # false
        request.variant.any?(:phone, :desktop)  # true
        request.variant.any?(:desktop, :watch)  # false

    *George Claghorn*

*   Fix regression where a gzip file response would have a Content-type,
    even when it was a 304 status code.

    See #19271.

    *Kohei Suzuki*

*   Fix handling of empty `X_FORWARDED_HOST` header in `raw_host_with_port`.

    Previously, an empty `X_FORWARDED_HOST` header would cause
    `Actiondispatch::Http:URL.raw_host_with_port` to return `nil`, causing
    `Actiondispatch::Http:URL.host` to raise a `NoMethodError`.

    *Adam Forsyth*

*   Allow `Bearer` as token-keyword in `Authorization-Header`.

    Additionally to `Token`, the keyword `Bearer` is acceptable as a keyword
    for the auth-token. The `Bearer` keyword is described in the original
    OAuth RFC and used in libraries like Angular-JWT.

    See #19094.

    *Peter Schröder*

*   Drop request class from `RouteSet` constructor.

    If you would like to use a custom request class, please subclass and implement
    the `request_class` method.

    *tenderlove@ruby-lang.org*

*   Fallback to `ENV['RAILS_RELATIVE_URL_ROOT']` in `url_for`.

    Fixed an issue where the `RAILS_RELATIVE_URL_ROOT` environment variable is not
    prepended to the path when `url_for` is called. If `SCRIPT_NAME` (used by Rack)
    is set, it takes precedence.

    Fixes #5122.

    *Yasyf Mohamedali*

*   Partitioning of routes is now done when the routes are being drawn. This
    helps to decrease the time spent filtering the routes during the first request.

    *Guo Xiang Tan*

*   Fix regression in functional tests. Responses should have default headers
    assigned.

    See #18423.

    *Jeremy Kemper*, *Yves Senn*

*   Deprecate `AbstractController#skip_action_callback` in favor of individual skip_callback methods
    (which can be made to raise an error if no callback was removed).

    *Iain Beeston*

*   Alias the `ActionDispatch::Request#uuid` method to `ActionDispatch::Request#request_id`.
    Due to implementation, `config.log_tags = [:request_id]` also works in substitute
    for `config.log_tags = [:uuid]`.

    *David Ilizarov*

*   Change filter on /rails/info/routes to use an actual path regexp from rails
    and not approximate javascript version. Oniguruma supports much more
    extensive list of features than javascript regexp engine.

    Fixes #18402.

    *Ravil Bayramgalin*

*   Non-string authenticity tokens do not raise NoMethodError when decoding
    the masked token.

    *Ville Lautanala*

*   Add `http_cache_forever` to Action Controller, so we can cache a response
    that never gets expired.

    *arthurnn*

*   `ActionController#translate` supports symbols as shortcuts.
    When a shortcut is given it also performs the lookup without the action
    name.

    *Max Melentiev*

*   Expand `ActionController::ConditionalGet#fresh_when` and `stale?` to also
    accept a collection of records as the first argument, so that the
    following code can be written in a shorter form.

        # Before
        def index
          @articles = Article.all
          fresh_when(etag: @articles, last_modified: @articles.maximum(:updated_at))
        end

        # After
        def index
          @articles = Article.all
          fresh_when(@articles)
        end

    *claudiob*

*   Explicitly ignored wildcard verbs when searching for HEAD routes before fallback

    Fixes an issue where a mounted rack app at root would intercept the HEAD
    request causing an incorrect behavior during the fall back to GET requests.

    Example:

        draw do
            get '/home' => 'test#index'
            mount rack_app, at: '/'
        end
        head '/home'
        assert_response :success

    In this case, a HEAD request runs through the routes the first time and fails
    to match anything. Then, it runs through the list with the fallback and matches
    `get '/home'`. The original behavior would match the rack app in the first pass.

    *Terence Sun*

*   Migrating xhr methods to keyword arguments syntax
    in `ActionController::TestCase` and `ActionDispatch::Integration`

    Old syntax:

        xhr :get, :create, params: { id: 1 }

    New syntax example:

        get :create, params: { id: 1 }, xhr: true

    *Kir Shatrov*

*   Migrating to keyword arguments syntax in `ActionController::TestCase` and
    `ActionDispatch::Integration` HTTP request methods.

    Example:

        post :create, params: { y: x }, session: { a: 'b' }
        get :view, params: { id: 1 }
        get :view, params: { id: 1 }, format: :json

    *Kir Shatrov*

*   Preserve default url options when generating URLs.

    Fixes an issue that would cause `default_url_options` to be lost when
    generating URLs with fewer positional arguments than parameters in the
    route definition.

    *Tekin Suleyman*

*   Deprecate `*_via_redirect` integration test methods.

    Use `follow_redirect!` manually after the request call for the same behavior.

    *Aditya Kapoor*

*   Add `ActionController::Renderer` to render arbitrary templates
    outside controller actions.

    Its functionality is accessible through class methods `render` and
    `renderer` of `ActionController::Base`.

    *Ravil Bayramgalin*

*   Support `:assigns` option when rendering with controllers/mailers.

    *Ravil Bayramgalin*

*   Default headers, removed in controller actions, are no longer reapplied on
    the test response.

    *Jonas Baumann*

*   Deprecate all `*_filter` callbacks in favor of `*_action` callbacks.

    *Rafael Mendonça França*

*   Allow you to pass `prepend: false` to `protect_from_forgery` to have the
    verification callback appended instead of prepended to the chain.
    This allows you to let the verification step depend on prior callbacks.

    Example:

        class ApplicationController < ActionController::Base
          before_action :authenticate
          protect_from_forgery prepend: false, unless: -> { @authenticated_by.oauth? }

          private
            def authenticate
              if oauth_request?
                # authenticate with oauth
                @authenticated_by = 'oauth'.inquiry
              else
                # authenticate with cookies
                @authenticated_by = 'cookie'.inquiry
              end
            end
        end

    *Josef Šimánek*

*   Remove `ActionController::HideActions`.

    *Ravil Bayramgalin*

*   Remove `respond_to`/`respond_with` placeholder methods, this functionality
    has been extracted to the `responders` gem.

    *Carlos Antonio da Silva*

*   Remove deprecated assertion files.

    *Rafael Mendonça França*

*   Remove deprecated usage of string keys in URL helpers.

    *Rafael Mendonça França*

*   Remove deprecated `only_path` option on `*_path` helpers.

    *Rafael Mendonça França*

*   Remove deprecated `NamedRouteCollection#helpers`.

    *Rafael Mendonça França*

*   Remove deprecated support to define routes with `:to` option that doesn't contain `#`.

    *Rafael Mendonça França*

*   Remove deprecated `ActionDispatch::Response#to_ary`.

    *Rafael Mendonça França*

*   Remove deprecated `ActionDispatch::Request#deep_munge`.

    *Rafael Mendonça França*

*   Remove deprecated `ActionDispatch::Http::Parameters#symbolized_path_parameters`.

    *Rafael Mendonça França*

*   Remove deprecated option `use_route` in controller tests.

    *Rafael Mendonça França*

*   Ensure `append_info_to_payload` is called even if an exception is raised.

    Fixes an issue where when an exception is raised in the request the additional
    payload data is not available.

    See #14903.

    *Dieter Komendera*, *Margus Pärt*

*   Correctly rely on the response's status code to handle calls to `head`.

    *Robin Dupret*

*   Using `head` method returns empty response_body instead
    of returning a single space " ".

    The old behavior was added as a workaround for a bug in an early
    version of Safari, where the HTTP headers are not returned correctly
    if the response body has a 0-length. This is been fixed since and
    the workaround is no longer necessary.

    Fixes #18253.

    *Prathamesh Sonpatki*

*   Fix how polymorphic routes works with objects that implement `to_model`.

    *Travis Grathwell*

*   Stop converting empty arrays in `params` to `nil`.

    This behavior was introduced in response to CVE-2012-2660, CVE-2012-2694
    and CVE-2013-0155

    ActiveRecord now issues a safe query when passing an empty array into
    a where clause, so there is no longer a need to defend against this type
    of input (any nils are still stripped from the array).

    *Chris Sinjakli*

*   Fixed usage of optional scopes in url helpers.

    *Alex Robbin*

*   Fixed handling of positional url helper arguments when `format: false`.

    Fixes #17819.

    *Andrew White*, *Tatiana Soukiassian*

Please check [4-2-stable](https://github.com/rails/rails/blob/4-2-stable/actionpack/CHANGELOG.md) for previous changes.