Rails 8.1.2 (January 08, 2026)

• Fix file_field to join mime types with a comma when provided as Array

  file_field(:article, :image, accept: ['image/png', 'image/gif', 'image/jpeg'])

  Now behaves likes:

  file_field(:article, :image, accept: 'image/png,image/gif,image/jpeg')

  Bogdan Gusiev

• Fix strict locals parsing to handle multiline definitions.

  Said Kaldybaev

• Fix content_security_policy_nonce error in mailers when using content_security_policy_nonce_auto setting.

  The content_security_policy_nonce helper is provided by ::ActionController::ContentSecurityPolicy, and it relies on request.content_security_policy_nonce. Mailers lack both the module and the request object.

  Jarrett Lusso

Rails 8.1.1 (October 28, 2025)

• Respect remove_hidden_field_autocomplete config in form builder hidden_field.

  Rafael Mendonça França

Rails 8.1.0 (October 22, 2025)

• The BEGIN template annotation/comment was previously printed on the same line as the following element. We now insert a newline inside the comment so it spans two lines without adding visible whitespace to the HTML output to enhance readability.

  Before:

  <!-- BEGIN /Users/siaw23/Desktop/rails/actionview/test/fixtures/actionpack/test/greeting.html.erb --><p>This is grand!</p>
  

  After:

  <!-- BEGIN /Users/siaw23/Desktop/rails/actionview/test/fixtures/actionpack/test/greeting.html.erb
  --><p>This is grand!</p>
  

  Emmanuel Hayford

• Add structured events for Action View:

  • action_view.render_template
  • action_view.render_partial
  • action_view.render_layout
  • action_view.render_collection
  • action_view.render_start

  Gannon McGibbon

• Fix label with for option not getting prefixed by form namespace value

  Abeid Ahmed, Hartley McGuire

• Add fetchpriority to Link headers to match HTML generated by preload_link_tag.

  Guillermo Iguaran

• Add CSP nonce to Link headers generated by preload_link_tag.

  Alexander Gitter

• Allow current_page? to match against specific HTTP method(s) with a method: option.

  Ben Sheldon

• Remove autocomplete="off" on hidden inputs generated by the following tags:

  • form_tag, token_tag, method_tag

  As well as the hidden parameter fields included in button_to, check_box, select (with multiple) and file_field forms.

  nkulway

• Enable configuring the strategy for tracking dependencies between Action View templates.

  The existing :regex strategy is kept as the default, but with load_defaults 8.1 the strategy will be :ruby (using a real Ruby parser).

  Hartley McGuire

• Introduce relative_time_in_words helper

  relative_time_in_words(3.minutes.from_now) # => "in 3 minutes"
  relative_time_in_words(3.minutes.ago) # => "3 minutes ago"
  relative_time_in_words(10.seconds.ago, include_seconds: true) # => "less than 10 seconds ago"

  Matheus Richard

• Make nonce: false remove the nonce attribute from javascript_tag, javascript_include_tag, and stylesheet_link_tag.

  francktrouillez

• Add dom_target helper to create dom_id-like strings from an unlimited number of objects.

  Ben Sheldon

• Respect html_options[:form] when collection_checkboxes generates the hidden <input>.

  Riccardo Odone

• Layouts have access to local variables passed to render.

  This fixes #31680 which was a regression in Rails 5.1.

  Mike Dalessio

• Argument errors related to strict locals in templates now raise an ::ActionView::StrictLocalsError, and all other argument errors are reraised as-is.

  Previously, any ArgumentError raised during template rendering was swallowed during strict local error handling, so that an ArgumentError unrelated to strict locals (e.g., a helper method invoked with incorrect arguments) would be replaced by a similar ArgumentError with an unrelated backtrace, making it difficult to debug templates.

  Now, any ArgumentError unrelated to strict locals is reraised, preserving the original backtrace for developers.

  Also note that ::ActionView::StrictLocalsError is a subclass of ArgumentError, so any existing code that rescues ArgumentError will continue to work.

  Fixes #52227.

  Mike Dalessio

• Improve error highlighting of multi-line methods in ERB templates or templates where the error occurs within a do-end block.

  Martin Emde

• Fix a crash in ERB template error highlighting when the error occurs on a line in the compiled template that is past the end of the source template.

  Martin Emde

• Improve reliability of ERB template error highlighting. Fix infinite loops and crashes in highlighting and improve tolerance for alternate ERB handlers.

  Martin Emde

• Allow hidden_field and hidden_field_tag to accept a custom autocomplete value.

  brendon

• Add a new configuration content_security_policy_nonce_auto for automatically adding a nonce to the tags affected by the directives specified by the content_security_policy_nonce_directives configuration option.

  francktrouillez

Please check [8-0-stable]) for previous changes.