Previously, developers had to manually specify lists of job states for uniqueness, which was error-prone and could lead to subtle bugs when states were omitted or incorrectly combined. The new predefined groups ensure correctness and consistency across applications.

The new state groups are:

• :all - All job states
• :incomplete - Jobs that haven't finished (~w(available scheduled executing retryable)a)
• :scheduled - Only scheduled jobs ([:scheduled])
• :successful - Jobs that completed successfully (~w(available scheduled executing retryable completed)a)

These groups eliminate the risk of accidentally creating incomplete or incorrect state lists that could allow duplicate jobs to be created when they shouldn't be, or prevent valid job creation when duplicates should be allowed.

🪺 Nested Plugin Supervision

Plugins and the internal Stager are now nested within a secondary supervision tree to improve system resilience and stability.

Previously, plugins were supervised directly under the main Oban supervisor alongside core process. This meant that plugin failures could potentially impact the entire Oban system, and frequent plugin restarts could trigger cascading failures in the primary supervision tree.

The new supervisor has more lenient restart limits to allow for more plugin restart attempts before giving up. This change makes Oban more robust in production environments where plugins may experience transient failures due to database or connectivity issues.

v2.20.0 — 2025-08-13

Enhancements

• Migration Add V13 migration for indexing cancelled and discarded states.

  A new V13 migration adds compound indexes to significantly improve Oban.Plugins.Pruner performance when cleaning up discarded and cancelled jobs. This is especially beneficial for applications that process large volumes of jobs and retain them for extended periods.

• Repo Expose dynamic repo switching as with_dynamic_repo/2

  The function was previously internal, which made impossible to use in external modules or extend upon. Now custom plugins and extensions can use Repo.with_dynamic_repo/2 to use the configured dynamic repo options.

Bug Fixes

• [Oban] Allow insert_all/1,3 via Oban facade

  The insert_all/1 and insert_all/3 function variants were missing from the generated Oban facade functions when using a named instance.

• [Testing] Generate correct perform_job/1,2,3 clauses.

  The perform_job/2,3 clauses generated by use Oban.Testing didn't handle the perform_job/2 variant designed to run jobs created with build_job/3. This caused test failures when trying to execute jobs built using the build_job/3 helper function.

  The fix generates the missing perform_job/2 clause along with a convenient perform_job/1 variant, ensuring all testing scenarios work seamlessly regardless of how jobs are constructed.

• [Testing] Restrict inline execution to available and scheduled states.

  Jobs in the completed state or other non-runnable states were incorrectly attempted by the inline engine, potentially causing errors or unexpected behavior during testing.

• [Worker] Disallow :keys when :fields doesn't contain :args or :meta

  Unique job configurations using :keys were allowed even when :fields didn't include :args or :meta, which would result in runtime errors since keys can only extract values from these keyable fields.

• [Cron] Fix error message when the crontab has an invalid range.

  Cron validation errors for invalid ranges were returning exception structs instead of readable error messages, making it difficult to understand and fix crontab configuration issues.