Delayed::Job belongs_to owner

gistfile1.rb

# db/migrate/#{timestamp}_add_owner_to_delayed_jobs
class AddOwnerToDelayedJobs < ActiveRecord::Migration
  def self.up
    add_column(:delayed_jobs, :owner_type, :string)
    add_column(:delayed_jobs, :owner_id, :integer)
  end

  def self.down
    remove_column(:delayed_jobs, :owner_type)
    remove_column(:delayed_jobs, :owner_id)
  end
end

# config/initializers/delayed_job_config.rb
class Delayed::Job < ActiveRecord::Base
  scope :live, where('failed_at IS NULL')
  belongs_to :owner, :polymorphic => true
end

# app/models/foo.rb
  has_many :bars
  def do_something_with_bar
    Delayed::Job.enqueue(self.bars.create!(:spam => 'eggs'), :owner => self)
  end

# app/models/bar.rb
  belongs_to :foo
  def perform
    do_something_time_intensive_with_spam
  end

Thanks.