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* Add `session#fetch` method
fetch behaves similarly to [Hash#fetch](http://www.ruby-doc.org/core-1.9.3/Hash.html#method-i-fetch),
with the exception that the returned value is always saved into the session.
It returns a value from the hash for the given key.
If the key can’t be found, there are several options:
* With no other arguments, it will raise an KeyError exception.
* If a default value is given, then that will be returned.
* If the optional code block is specified, then that will be run and its result returned.
*Damien Mathieu*
* Don't let strong parameters mutate the given hash via `fetch`
Create a new instance if the given parameter is a `Hash` instead of
passing it to the `convert_hashes_to_parameters` method since it is
overriding its default value.
*Brendon Murphy*, *Doug Cole*
* Add `params` option to `button_to` form helper, which renders the given hash
as hidden form fields.
*Andy Waite*
* Make assets helpers work in the controllers like it works in the views.
Example:
# config/application.rb
config.asset_host = 'http://mycdn.com'
ActionController::Base.helpers.asset_path('fallback.png')
# => http://mycdn.com/assets/fallback.png
Fixes #10051.
*Tima Maslyuchenko*
* Respect `SCRIPT_NAME` when using `redirect` with a relative path
Example:
# application routes.rb
mount BlogEngine => '/blog'
# engine routes.rb
get '/admin' => redirect('admin/dashboard')
This now redirects to the path `/blog/admin/dashboard`, whereas before it would've
generated an invalid url because there would be no slash between the host name and
the path. It also allows redirects to work where the application is deployed to a
subdirectory of a website.
Fixes #7977.
*Andrew White*
* Fixing repond_with working directly on the options hash
This fixes an issue where the respond_with worked directly with the given
options hash, so that if a user relied on it after calling respond_with,
the hash wouldn't be the same.
Fixes #12029.
*bluehotdog*
* Fix `ActionDispatch::RemoteIp::GetIp#calculate_ip` to only check for spoofing
attacks if both `HTTP_CLIENT_IP` and `HTTP_X_FORWARDED_FOR` are set.
Fixes #10844.
*Tamir Duberstein*
* Strong parameters should permit nested number as key.
Fixes #12293.
*kennyj*
* Fix regex used to detect URI schemes in `redirect_to` to be consistent with
RFC 3986.
*Derek Prior*
* Fix incorrect `assert_redirected_to` failure message for protocol-relative
URLs.
*Derek Prior*
* Fix an issue where router can't recognize downcased url encoding path.
Fixes #12269.
*kennyj*
* Fix custom flash type definition. Misusage of the `_flash_types` class variable
caused an error when reloading controllers with custom flash types.
Fixes #12057.
*Ricardo de Cillo*
* Do not break params filtering on `nil` values.
Fixes #12149.
*Vasiliy Ermolovich*
* Separate Action View completely from Action Pack.
*Łukasz Strzałkowski*
* Development mode exceptions are rendered in text format in case of XHR request.
*Kir Shatrov*
* Fix an issue where :if and :unless controller action procs were being run
before checking for the correct action in the :only and :unless options.
Fixes #11799.
*Nicholas Jakobsen*
* Fix an issue where `assert_dom_equal` and `assert_dom_not_equal` were
ignoring the passed failure message argument.
Fixes #11751.
*Ryan McGeary*
* Allow REMOTE_ADDR, HTTP_HOST and HTTP_USER_AGENT to be overridden from
the environment passed into `ActionDispatch::TestRequest.new`.
Fixes #11590.
*Andrew White*
* Fix an issue where Journey was failing to clear the named routes hash when the
routes were reloaded and since it doesn't overwrite existing routes then if a
route changed but wasn't renamed it kept the old definition. This was being
masked by the optimised url helpers so it only became apparent when passing an
options hash to the url helper.
*Andrew White*
* Skip routes pointing to a redirect or mounted application when generating urls
using an options hash as they aren't relevant and generate incorrect urls.
Fixes #8018.
*Andrew White*
* Move `MissingHelperError` out of the `ClassMethods` module.
*Yves Senn*
* Fix an issue where rails raise exception about missing helper where it
should throw `LoadError`. When helper file exists and only loaded file from
this helper does not exist rails should throw LoadError instead of
`MissingHelperError`.
*Piotr Niełacny*
* Fix `ActionDispatch::ParamsParser#parse_formatted_parameters` to rewind body input stream on
parsing json params.
Fixes #11345.
*Yuri Bol*, *Paul Nikitochkin*
* Ignore spaces around delimiter in Set-Cookie header.
*Yamagishi Kazutoshi*
* Remove deprecated Rails application fallback for integration testing, set
`ActionDispatch.test_app` instead.
*Carlos Antonio da Silva*
* Remove deprecated `page_cache_extension` config.
*Francesco Rodriguez*
* Remove deprecated constants from Action Controller:
ActionController::AbstractRequest => ActionDispatch::Request
ActionController::Request => ActionDispatch::Request
ActionController::AbstractResponse => ActionDispatch::Response
ActionController::Response => ActionDispatch::Response
ActionController::Routing => ActionDispatch::Routing
ActionController::Integration => ActionDispatch::Integration
ActionController::IntegrationTest => ActionDispatch::IntegrationTest
*Carlos Antonio da Silva*
* Fix `Mime::Type.parse` when bad accepts header is looked up. Previously it
was setting `request.formats` with an array containing a `nil` value, which
raised an error when setting the controller formats.
Fixes #10965.
*Becker*
* Merge `:action` from routing scope and assign endpoint if both `:controller`
and `:action` are present. The endpoint assignment only occurs if there is
no `:to` present in the options hash so should only affect routes using the
shorthand syntax (i.e. endpoint is inferred from the path).
Fixes #9856.
*Yves Senn*, *Andrew White*
* ActionView extracted from ActionPack
*Piotr Sarnacki*, *Łukasz Strzałkowski*
* Fix removing trailing slash for mounted apps #3215
*Piotr Sarnacki*
Please check [4-0-stable](https://github.com/rails/rails/blob/4-0-stable/actionpack/CHANGELOG.md) for previous changes.
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