Active Model

• No changes.

Active Record

• Fix counting cached queries in ActiveRecord::RuntimeRegistry.

  fatkodima

• Fix merging relations with arel equality predicates with null relations.

  fatkodima

• Fix SQLite3 schema dump for non-autoincrement integer primary keys.

  Previously, schema.rb should incorrectly restore that table with an auto incrementing primary key.

  Chris Hasiński

• Fix PostgreSQL schema_search_path not being reapplied after reset! or reconnect!.

  The schema_search_path configured in database.yml is now correctly reapplied instead of falling back to PostgreSQL defaults.

  Tobias Egli

• Restore the ability of enum to be foats.

  enum :rating, { low: 0.0, medium: 0.5, high: 1.0 },
  

  In Rails 8.1.0, enum values are eagerly validated, and floats weren't expected.

  Said Kaldybaev

• Ensure batched preloaded associations accounts for klass when grouping to avoid issues with STI.

  zzak, Stjepan Hadjic

• Fix ActiveRecord::SoleRecordExceeded#record to return the relation.

  This was the case until Rails 7.2, but starting from 8.0 it started mistakenly returning the model class.

  Jean Boussier

• Improve PostgreSQLAdapter resilience to Timeout.timeout.

  Better handle asynchronous exceptions being thrown inside the reconnect! method.

  This may fixes some deep errors such as:

  undefined method `key?' for nil:NilClass (NoMethodError)
            if !type_map.key?(oid)
  

  Jean Boussier

• Fix structured events for Active Record was not being emitted.

  Yuji Yaginuma

• Fix eager_load when loading has_many assocations with composite primary keys.

  This would result in some records being loaded multiple times.

  Martin-Alexander

Action View

• 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

Action Pack

• Add config.action_controller.live_streaming_excluded_keys to control execution state sharing in ActionController::Live.

  When using ActionController::Live, actions are executed in a separate thread that shares state from the parent thread. This new configuration allows applications to opt-out specific state keys that should not be shared.

  This is useful when streaming inside a connected_to block, where you may want the streaming thread to use its own database connection context.

  # config/application.rb
  config.action_controller.live_streaming_excluded_keys = [:active_record_connected_to_stack]
  

  By default, all keys are shared.

  Eileen M. Uchitelle

• Fix IpSpoofAttackError message to include Forwarded header content.

  Without it, the error message may be misleading.

  zzak

Active Job

• Fix ActiveJob.perform_all_later to respect job_class.enqueue_after_transaction_commit.

  Previously, perform_all_later would enqueue all jobs immediately, even if they had enqueue_after_transaction_commit = true. Now it correctly defers jobs with this setting until after transaction commits, matching the behavior of perform_later.

  OuYangJinTing

• Fix using custom serializers with ActiveJob::Arguments.serialize when ActiveJob::Base hasn't been loaded.

  Hartley McGuire

Action Mailer

• No changes.

Action Cable

• No changes.

Active Storage

• Restore ADC when signing URLs with IAM for GCS

  ADC was previously used for automatic authorization when signing URLs with IAM. Now it is again, but the auth client is memoized so that new credentials are only requested when the current ones expire. Other auth methods can now be used instead by setting the authorization on ActiveStorage::Service::GCSService#iam_client.

  ActiveStorage::Blob.service.iam_client.authorization = Google::Auth::ImpersonatedServiceAccountCredentials.new(options)
  

  This is safer than setting Google::Apis::RequestOptions.default.authorization because it only applies to Active Storage and does not affect other Google API clients.

  Justin Malčić

Action Mailbox

• No changes.

Action Text

• No changes.

Railties

• Skip all system test files on app generation.

  Eileen M. Uchitelle

• Fix db:system:change to correctly update Dockerfile base packages.

  Josiah Smith

• Fix devcontainer volume mount when app name differs from folder name.

  Rafael Mendonça França

• Fixed the rails notes command to properly extract notes in CSS files.

  David White

• Fixed the default Dockerfile to properly include the vendor/ directory during bundle install.

  Zhong Sheng

Guides

• No changes.