I recently had a Ruby on Rails ActiveJob task where I needed to know the exact time when the job was originally enqueued at (i.e. when
perform_later was called).
Initially I passed an additional argument with the current time to the
perform_later method call. That solution proved really messy, as I was needlessly passing the same argument in everywhere. It also wasn’t particularly quick to implement onto other projects & jobs.
After a bit of exploration through the documentation, I came across a
enqueued_at method which is available out of the box with ActiveJob. However, as I experimented with this method I noticed if a job had to be retried due to an exception, the
enqueued_at value would be updated to the time it had been enqueued to be retried again.
Getting the initial time the job was enqueued
I found the cleanest solution to solve this was to add a little
attr_writer to my
ApplicationJob class, which I pass as an extra value in when a job is serialized & passed onto Sidekiq.
# app/jobs/application_job.rb class ApplicationJob < ActiveJob::Base attr_writer :initially_enqueued_at def initially_enqueued_at @initially_enqueued_at ||= Time.zone.now end def serialize super.merge('initially_enqueued_at' => initially_enqueued_at) end def deserialize(job_data) super self.initially_enqueued_at = Time.parse(job_data['initially_enqueued_at']) end end
Now when whenever I run a job, I have the method
initially_enqueued_at available to me which returns the time the initial
perform_later is called.