How to cancel scheduled job with delayed_job in Rails?

Question

I am scheduling a job to run in say, 10 minutes. How to properly cancel this particular job without using any kind of dirty extra fields in model and so on. Is there any cal

Answer 1

delayed_job 3 introduced a queue attribute. This can be hijacked to schedule a cancelable job.

class MyJob < Struct.new(:user_id)
  def self.queue_name
    "something-unique"
  end

  def perform
    # ...
  end
end

#scheduler
my_job = MyJob.new(User.first.id)
#'cancel' pending jobs first
Delayed::Job.where(queue: my_job.class.queue_name).destroy_all
#queue it up
Delayed::Job.enqueue(my_job,
  queue: my_job.class.queue_name,
  run_at: 1.hour.from_now
)