Unable to use devise_token_auth with active_admin

Question

I'm trying to used devise_token_auth with active_admin. When running rails g active_admin:install User I get the following error.

error

usr/local/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/routing/route_set.rb:578:in add_route': Invalid route name, already in use: 'new_user_session' You may have defined two routes with the same name using the:as` option, or you may be overriding a route already defined by a resource with the same naming.

routes.rb

Rails.application.routes.draw do
  devise_for :users, ActiveAdmin::Devise.config
  ActiveAdmin.routes(self)
  mount_devise_token_auth_for 'User', at: 'auth'

  scope module: 'api' do
    namespace :v1 do
      resources :users, only: [:index, :show]
    end
  end

  get '/docs' => redirect('/swagger/dist/index.html?url=/apidocs/api-docs.json')
end

can you please share the output of `rails routes -g new_user_session`? — Wasif Hossain, Nov 17 '17 at 08:17
@WasifHossain I get the same error as above. If I remove `devise_for` I can run the server but then I can't login to active_admin — Antarr Byrd, Nov 17 '17 at 08:22

score 1 · Answer 1 · answered Nov 17 '17 at 08:27

can you try a different approach by defining two controllers: one for api and the other for active_admin?

# app/controllers/api_controller.rb
# API routes extend from this controller
class ApiController < ActionController::Base
  include DeviseTokenAuth::Concerns::SetUserByToken
end

# app/controllers/application_controller.rb
# leave this for ActiveAdmin, and any other non-api routes
class ApplicationController < ActionController::Base
end

Now inherit all api controllers from ApiController and ActiveAdmin ones from ApplicationController.

There is a known issue between ActiveAdmin and DeviseTokenAuth

i see. let me take a deep dive into this – Wasif Hossain Nov 17 '17 at 08:29 — Wasif Hossain, Nov 17 '17 at 08:29

score 1 · Accepted Answer · answered Nov 17 '17 at 08:43

I got it working by moving mount_devise_token_auth_for 'User', at: 'auth' into the api scope. The answer was right , here.

Rails.application.routes.draw do
  devise_for :users, ActiveAdmin::Devise.config
  ActiveAdmin.routes(self)

  constraints subdomain: 'api'do
    scope module: 'api' do
      namespace :v1 do
        resources :users, only: [:index, :show]
        mount_devise_token_auth_for 'User', at: 'auth'
      end
    end

    get '/docs' => redirect('/swagger/dist/index.html?url=/apidocs/api-docs.json')
  end
end

exactly! thats the way it should be done. thanks for the solution too! — Wasif Hossain, Nov 17 '17 at 08:50

Unable to use devise_token_auth with active_admin

error

routes.rb

2 Answers2