ActionController::RoutingError: uninitialized constant Api::V1::ApiController

Question

I have Rails 5 API project for controlling user tasks and I have the following error but not always for the same controller and route.

ActionController::RoutingError: uninitialized constant Api::V1::ApiController

I describe you a little bit my project to explain in more detail the error.

App structure

Routes

scope module: 'api' do
  namespace :v1 do

    # => Login routes
    scope module: 'login' do
      match 'login', to: 'sessions#login', as: 'login', via: :post
    end

    # => Team routes
    scope module: 'team' do

      # => no admin routes
      resources :tasks, except: [:index] do
        collection do
          match ':view', to: 'tasks#index', as: 'tasks', via: [:get, :post]
        end
      end
    end

  end
end

API Controller

module Api
  class ApiController < ApplicationController

    def respond_with_errors(object)
      render json: {errors: ErrorSerializer.serialize(object)}, status: :unprocessable_entity
    end

  end
end

Team Controller

module Api::V1
  class Team::TeamController < ApiController

Tasks Controller

module Api::V1
  class Team::TasksController < Team::TeamController

Login Controller

module Api::V1
  class Login::LoginController < ApiController

Sessions Controller

module Api::V1
  class Login::SessionsController < Login::LoginController

When I execute login route and after tasks route, I get the error in last route and all the routes in team module. If I change the project and save it (only one blank space) and then I execute tasks route and after login route, I get the error in last route and all the routes in login module.

It doesn't have any sense...

Rails server in this errors

Solution 1

You should be using the right constant while inheriting - ::Api::ApiController:

module Api::V1
  class Team::TeamController < ::Api::ApiController

because otherwise it is searching for Api::V1::ApiController, but should search for Api::ApiController

Solution 2

Right now you have Api::ApiController.
Your app/controllers/api/v1/api_controller.rb is missing V1 in namespace

module Api::V1
  class ApiController < ApplicationController
    ..
  end
end

UPDATE

If your ApiController is outside V1 folder then you should do

module Api::V1
  class Team::TeamController < ::Api::ApiController

Comments

[Adrià Carro]

My API Controller is outside V1 folder.

[Adrià Carro]

My API Controller is outside V1 folder.

[Andrey Deineko]

camon, this is just stolen from my answer :)

[Aleksey]

no, it's your who stole it. I wrote comment to the question initially and was about to answer it.

[Andrey Deineko]

it does not matter who wrote the comment, it is the answer that you have edited after I realized I was wrong with my first one. Have guts to admit

[Andrey Deineko]

@carro always make sure you use the correct constant :)

[Aleksey]

@Andrey Deineko carro has commented my answer too (he even has done it 1 minute earlier than your answer). So I have updated it. Yes, after that I have saw that you have done it too (even in the same way).

[Andrey Deineko]

not going to discuss this further. answers' edition time speaks for itself :)

[Aleksey]

I just have not saw it at the time. I never stole any answer.