Uninitialized constant "Controller Name"

Question

I'm having an error with my routes/resources and controllers.

I have the following in the routes.rb:

# routes.rb
resources :users do  
  resource :schedule  
end

And I have a schedule_controller.rb inside controllers/users/ set up as I think it should be:

class Users::ScheduleController < ApplicationController

  # Controller methods here...

end

Running a rake:routes shows

user_schedule      POST   /users/:user_id/schedule(.:format)       schedules#create
new_user_schedule  GET    /users/:user_id/schedule/new(.:format)   schedules#new
edit_user_schedule GET    /users/:user_id/schedule/edit(.:format)  schedules#edit
                   GET    /users/:user_id/schedule(.:format)       schedules#show
                   PUT    /users/:user_id/schedule(.:format)       schedules#update

However, navigating to /users/:user_id/schedule is returning the following error:

uninitialized constant SchedulesController

My only thoughts on what the problem could be are that is has something to do with nested resources or declaring a single resource and I'm going wrong somewhere.

I'm using the helper

new_user_schedule_path(current_user)

when linking to my 'new' view.

Answer 1

It should be SchedulesController, not Users::ScheduleController. Controllers should only be namespaced when the route is namespaced with namespace. Controller names should also always be plural.

What you're creating is a nested resource, not a namespaced one.

Answer 2

Is the namespacing of the SchedulesController intentional? i.e. do you really mean to do this?

class Users::SchedulesController < ApplicationController

Or are you only doing that because schedules are a "sub-thing" from users?

The reason I ask this is because typically within Rails, nested resource controllers aren't namespaced. You would only namespace a controller if you wanted to modify the controllers in a special way under a namespace. A common example of this would be having some controllers under an admin namespace, inheriting from a BaseController within that namespace that would restrict only admins from acessing those controllers.

Option 1

If you didn't intentionally namespace this controller, then you want to remove the Users:: prefix from your controller, and move it back to app/controllers/schedules_controller.rb, the helpers back to app/helpers/schedules_helper.rb and the views back to app/views/schedules. Perhaps you ran a generator which also generated a Users::Schedule model, which should also need to be renamed to Schedule and moved back to app/models/schedule.rb.

Option 2

If you did intentionally namespace this controller, then you want to do this in your routes:

namespace :users do
  resources :schedules
end

Leave everything that's been generated as it should be.

Answer 3

In your routes.rb you need to specify the controller like this:

resources :users do
  resource :schedules, controller: 'users/schedules'
end