Calling instance method from another class ruby

I am having this runtime error:

11843:E, [2015-05-13T11:00:00.467150 #9464] ERROR -- : 2015-05-13T11:00:00-0400: [Worker(delayed_job host:server pid:9464)] Job CronJob (id=5550d0f84d6f747bcb000000) FAILED with **NoMethodError: undefined method `loadData' for AdminController:Class**

How I can call the method loadData() from the cronJob class? I test the code using the console and it is working fine if I call from console: AdminController.new.loadData()

    class AdminController < ApplicationController

    ...

    def setLoadSchedule
        logger.debug "set hour #{params[:admin][:hour]}"
        sethour = params[:admin][:hour]

        Delayed::Job.find(Perseus::Application.config.delayed_job_id).destroy if Perseus::Application.config.delayed_job_id != :nil
    Perseus::Application.config.delayed_job_id = Delayed::Job.enqueue(CronJob.new, cron: '0 ' << sethour << ' * * 1-5')

    hide_action :loadData

    def loadData()
     ...
    end 

    private
    def isAdmin
        if !current_user.admin
        redirect_to root_path
        end
    end

    end

  class CronJob < Struct.new("CronJob")

    def perform
      AdminController.new.loadData()
    end
  end

Solution

Do not create controller by yourself, if you really have to invoke some method of controller in lower part of your application, pass instance of current controller as variable.

Example:

def index #method of controller AdminController
  CronJob.new(self).perform #so now you are passing controller which inherits from ApplicationController, so loadData method can be invoked on it(if it is public)
end

one more thing, in ruby we write load_data not loadData :)

one more thing#2

if your request is handled by let's say FooController, and you want to invoke method from AdminController it means you should encapsulate load_data method in some third object (DataLoader). Inheriting in FooController from AdminContorller is not a solution!