Sourced from activejob's releases.

8.1.0

Active Support

• Remove deprecated passing a Time object to Time#since.

  Rafael Mendonça França

• Remove deprecated Benchmark.ms method. It is now defined in the benchmark gem.

  Rafael Mendonça França

• Remove deprecated addition for Time instances with ActiveSupport::TimeWithZone.

  Rafael Mendonça França

• Remove deprecated support for to_time to preserve the system local time. It will now always preserve the receiver timezone.

  Rafael Mendonça França

• Deprecate config.active_support.to_time_preserves_timezone.

  Rafael Mendonça França

• Standardize event name formatting in assert_event_reported error messages.

  The event name in failure messages now uses .inspect (e.g., name: "user.created") to match assert_events_reported and provide type clarity between strings and symbols. This only affects tests that assert on the failure message format itself.

  George Ma

• Fix Enumerable#sole to return the full tuple instead of just the first element of the tuple.

  Olivier Bellone

• Fix parallel tests hanging when worker processes die abruptly.

  Previously, if a worker process was killed (e.g., OOM killed, kill -9) during parallel test execution, the test suite would hang forever waiting for the dead worker.

  Joshua Young

• Add config.active_support.escape_js_separators_in_json.

  Introduce a new framework default to skip escaping LINE SEPARATOR (U+2028) and PARAGRAPH SEPARATOR (U+2029) in JSON.

  Historically these characters were not valid inside JavaScript literal strings but that changed in ECMAScript 2019. As such it's no longer a concern in modern browsers: https://caniuse.com/mdn-javascript_builtins_json_json_superset.

... (truncated)

Sourced from activejob's changelog.

Rails 8.1.0 (October 22, 2025)

• Add structured events for Active Job:

  • active_job.enqueued
  • active_job.bulk_enqueued
  • active_job.started
  • active_job.completed
  • active_job.retry_scheduled
  • active_job.retry_stopped
  • active_job.discarded
  • active_job.interrupt
  • active_job.resume
  • active_job.step_skipped
  • active_job.step_started
  • active_job.step

  Adrianna Chang

• Deprecate built-in sidekiq adapter.

  If you're using this adapter, upgrade to sidekiq 7.3.3 or later to use the sidekiq gem's adapter.

  fatkodima

• Remove deprecated internal SuckerPunch adapter in favor of the adapter included with the sucker_punch gem.

  Rafael Mendonça França

• Remove support to set ActiveJob::Base.enqueue_after_transaction_commit to :never, :always and :default.

  Rafael Mendonça França

• Remove deprecated Rails.application.config.active_job.enqueue_after_transaction_commit.

  Rafael Mendonça França

• ActiveJob::Serializers::ObjectSerializers#klass method is now public.

  Custom Active Job serializers must have a public #klass method too. The returned class will be index allowing for faster serialization.

  Jean Boussier

• Allow jobs to the interrupted and resumed with Continuations

  A job can use Continuations by including the ActiveJob::Continuable concern. Continuations split jobs into steps. When the queuing system is shutting down jobs can be interrupted and their progress saved.

... (truncated)

• 1cdd190 Preparing for 8.1.0 release
• 4663af7 Merge pull request #55922 from Shopify/event_subscriber_additionss
• 1ace683 Preparing for 8.1.0.rc1 release
• d6f9f62 Make the Structured Event Subscriber emit events in format that are useful fo...
• f7e7080 Move implementation fully into #index_serializers
• 87051fc Deprecate usage of custom ActiveJob serializers
• ebb01c5 Emit only one structured event per notification event
• 1a25283 Structured events for Active Job
• df49ce1 Restore initial condition around setting of time attributes when deserializin...
• bb30186 Optimize ActiveJob ObjectSerializer
• Additional commits viewable in compare view

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