How to draw routes in Rails engine gem?

Question

I'm having a lot of trouble drawing routes in an engine gem I'm building. No idea what I'm doing wrong...I must have tried a half dozen different things already. Currently my gem looks like this:

Gem structure:

├── Gemfile
├── MIT-LICENSE
├── README.md
├── app
│   └── controllers
│       └── rails_dribbble_oauth
│           └── main_controller.rb
├── config
│   └── routes.rb
├── lib
│   ├── rails_dribbble_oauth
│   │   ├── engine.rb
│   │   └── version.rb
│   └── rails_dribbble_oauth.rb
└── rails_dribbble_oauth.gemspec

/app/controllers/rails_dribbble_oauth/main_controller.rb:

module RailsDribbbleOauth
  class MainController < ::ApplicationController
    # some instance methods
  end
end

/lib/rails_dribbble_oauth/engine.rb:

module RailsDribbbleOauth
  class Engine < ::Rails::Engine
    isolate_namespace :RailsDribbbleOauth
  end
end

lib/rails_dribbble_oauth.rb:

require "rails_dribbble_oauth/engine"

module RailsDribbbleOauth
end

config/routes.rb:

Rails.application.routes.draw do
    get 'request',     to: 'main#request',  as: "dribbble_oauth_request"
    get 'callback',    to: 'main#passthru', as: "dribbble_callback"
end

When I add this into my test app and run rake routes, none of the routes defined in the gem appear in my app.

I've also tried mounting it by using RailsDribbbleOauth::Engine.routes.draw , then adding mount RailsDribbbleOauth::Engine, at: '/dribbble' into my test app, but that's resulted in NameError: uninitialized constant RailsDribbbleOauth::Engine .

Any help is really appreciated, thank you.

Edit: test app's Gemfile does include the gem. Gem is currently being developed within the test app at lib/engines/rails_dribbble_oauth . From test app's Gemfile: gem 'rails-dribbble-oauth', path: 'lib/engines/rails_dribbble_oauth' . Still, rake routes does not yield any routes defined in the gem.

Answer 1

Maybe you need to add the engine to the test applications Gemfile , for example:

# if the engines in at RAILS_ROOT/engines
gem 'rails_dribble_oauth', path: 'engines/rails_dribble_oauth'

# somewhere else
gem 'rails_dribble_oauth', path: '~/dev/rails_dribble_oauth'