group_job.rb

class GroupJob
  def initialize(attributes = {})
    #do stuff
  end

  def perform
    # do stuff
  end

  def success(job)
    scheduled_job(job.id).update_attributes({ :delayed_job_id => nil, :job_status_id => 2 })
  end

private
  def scheduled_job(delayed_job_id)
    ScheduledJob.where(delayed_job_id: delayed_job_id).first
  end
end