Answer by Schwern for access concern method in a rails activeJob

include GenericMethods should simply go inside class SomeJob. Not inside a method. Then it injects its methods when the class loads.

class SomeJob < ApplicationJob  include GenericMethods  queue_as :default  def perform(days_ahead)    create_availabililty(days_ahead)  endend

Or if you want it applicable to every ApplicationJob, you'd put it in class ApplicationJob.