Render a view from a model in Rails

CopyApplicationController.render(
  :template => 'users/index',
  :layout => 'my_layout',
  :assigns => { users: @users }
)

CopyApplicationController.renderer.defaults # =>
{
  http_host: 'example.org',
  https:      false,
  ...
}

Copyrenderer = ApplicationController.renderer.new(
  http_host: 'example.org',
  https:      false
)

renderer.render(
  :template => 'users/index',
  :layout => 'my_layout',
  :assigns => { users: @users }
)

CopyApplicationController.new.render_to_string(
  :template => 'users/index',
  :layout => 'my_layout',
  :locals => { :@users => @users }
)