Have demo CleanupJob use GoodJob.cleanup_preserved_jobs

lib/good_job.rb

@@ -131,7 +131,7 @@ def self._shutdown_all(executables, method_name = :shutdown, timeout: -1)
   # analyze or inspect job performance.
   # If you are preserving job records this way, use this method regularly to
   # delete old records and preserve space in your database.
-  # @params older_than [nil,Numeric,ActiveSupport::Duration] Jobs olders than this will be deleted (default: +86400+).
+  # @params older_than [nil,Numeric,ActiveSupport::Duration] Jobs older than this will be deleted (default: +86400+).
   # @return [Integer] Number of jobs that were deleted.
   def self.cleanup_preserved_jobs(older_than: nil)
     older_than ||= GoodJob::Configuration.new({}).cleanup_preserved_jobs_before_seconds_ago

spec/test_app/app/jobs/cleanup_job.rb

@@ -1,10 +1,7 @@
 class CleanupJob < ApplicationJob
   self.queue_name = :cleanup
 
-  def perform(limit = 1_000)
-    earliest_job_to_preserve = GoodJob::Execution.finished.order(created_at: :desc).limit(limit).last
-    return if earliest_job_to_preserve.blank?
-
-    GoodJob::Execution.where("created_at < ?", earliest_job_to_preserve.created_at).delete_all
+  def perform(*args)
+    GoodJob.cleanup_preserved_jobs
   end
 end