discourse/app/jobs/onceoff.rb

class Jobs::Onceoff < Jobs::Base
  sidekiq_options retry: false

  def self.name_for(klass)
    klass.name.sub(/^Jobs\:\:/, '')
  end

  # Pass `force: true` to force it happen again
  def execute(args)
    job_name = self.class.name_for(self.class)

    if args[:force] || !OnceoffLog.where(job_name: job_name).exists?
      execute_onceoff(args)
      OnceoffLog.create(job_name: job_name)
    end
  end

  def self.enqueue_all
    ObjectSpace.each_object(Class).select { |klass| klass < self }.each do |klass|
      job_name = name_for(klass).underscore.to_sym
      Jobs.enqueue(job_name)
    end
  end

end