There wasn't any queue named default in our Rails code. But it seems Sidekiq sets queue for ActiveStorage::PurgeJob as default. That was why purge_later never worked.
[ActiveJob] Enqueued ActiveStorage::PurgeJob (Job ID: .. ) to Sidekiq(default) with arguments
Is there a way to have different queue name than "default" here? I couldn't find documentation about it yet.
You can change the queue used by Active Storage for its async jobs at the configuration level like this
config.active_storage.queue = :low_priority
To make this an application-wide change, put it into your application.rb. For environment-specific changes, put it into the relevant environment file under config/environments
See the documentation here:
https://guides.rubyonrails.org/configuring.html#configuring-active-storage
This did not work for me, instead the following worked
config.active_storage.queues = Hash.new(:default)
This is due to purge_job.rb looking up the queue name like so
queue_as { ActiveStorage.queues[:purge] }
For Rails 7.1, setting config.active_storage.queue doesn't impact the queue used by the PurgeJob.
This did the trick:
config.active_storage.queues.analysis = "my-queue"
config.active_storage.queues.purge = "my-queue"