andela/eventx

class CreateDelayedJobs < ActiveRecord::Migration
  def self.up
    create_table :delayed_jobs, force: true do |table|
      table.integer :priority, default: 0, null: false
      # Allows some jobs to jump to the front of the queue
      table.integer :attempts, default: 0, null: false
      # Provides for retries, but still fail eventually.
      table.text :handler,                 null: false
      # 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 null: true
    end

    add_index :delayed_jobs, [:priority, :run_at], name: "delayed_jobs_priority"
  end

  def self.down
    drop_table :delayed_jobs
  end
end