class CreateDelayedJobs

def self.down
  drop_table :delayed_jobs
end

def self.up
  create_table :delayed_jobs, :force => true do |table|
    table.integer  :priority, :default => 0      # Allows some jobs to jump to the front of the queue
    table.integer  :attempts, :default => 0      # Provides for retries, but still fail eventually.
    table.text     :handler                      # YAML-encoded string of the object that will do work
    table.text     :last_error                   # reason for last failure (See Note below)
    table.datetime :run_at                       # When to run. Could be Time.zone.now for immediately, or sometime in the future.
    table.datetime :locked_at                    # Set when a client is working on this object
    table.datetime :failed_at                    # Set when all retries have failed (actually, by default, the record is deleted instead)
    table.string   :locked_by                    # Who is working on this object (if locked)
    table.string   :queue                        # The name of the queue this job is in
    table.timestamps
  end
  add_index :delayed_jobs, [:priority, :run_at], :name => 'delayed_jobs_priority'
end