How to set fake request object for rails controller object

Question

I need to use render_to_string method outside the controller. So I create controller instance like:

  controller = class_name.constantize.new # Rails controller instance
  controller.params = params
  controller.action_name = 'index'
  controller.create_global_current_user user
  index_render_options = controller.send('index_render_options')
  controller.send('render_to_string', index_render_options)

But it fails because request object inside is nil. Could you help me with it? how to create fake request for controller object?

Answer 1

SOLVED.

Added

  controller.request = ActionDispatch::Request.new({})
  resp = controller.class.make_response!(controller.request)
  controller.set_response!(resp)

so now it looks like

      controller = class_name.constantize.new
      controller.params = params
      controller.action_name = 'index'
      controller.request = ActionDispatch::Request.new({})
      resp = controller.class.make_response!(controller.request)
      controller.set_response!(resp)
      controller.create_global_current_user user
      index_render_options = controller.send('index_render_options')
      controller.send('render_to_string', index_render_options)