Devise+Omniauth, routes versioning

devise, oauth, ruby-on-rails-4

Solution

Alright, let's recap a little bit here, Devise doesn't allow you to call the `devise_for` method inside a `scope` or a `namespace` route defined in the config/routes.rb file, right?

My namespace'd route looks like this:

namespace :api, constraints: { format: :json } do
  devise_for :users, skip: [ :registrations, :passwords, :confirmations ]
  resources :profiles, only: :show
end

And it works!

What did I do to make it work? the answer lies in the `config/initializers/devise.rb` file. Check out near the bottom of the File it says...

`# When using omniauth, Devise cannot automatically set Omniauth path, # so you need to do it manually. For the users scope, it would be:`

The next commented line shows you an example, uncomment that line and modify it according to your needs, for my case(ie. for the namespaced route I have above) I have:

config.omniauth_path_prefix = "/api/users/auth"

And that's it! .... I did that and it all started to work perfectly!

Hope it helps!

Problem

I have a model Candidate which is devise omniauthable (linkedin). So far, my routes.rb looked like this : ``` namespace :v1 do devise_for :candidates, only: :omniauth_callbacks ... end ``` Everything worked well till I had to add a new version : ``` namespace :v2 do devise_for :candidates, only: :omniauth_callbacks ... end namespace :v1 do devise_for :candidates, only: :omniauth_callbacks ... end ``` With the current configuration, I get this error : ``` `set_omniauth_path_prefix!': Wrong OmniAuth configuration. If you are getting this exception, it means that either: (RuntimeError) 1) You are manually setting OmniAuth.config.path_prefix and it doesn't match the Devise one 2) You are setting :omniauthable in more than one model 3) You changed your Devise routes/OmniAuth setting and haven't restarted your server ``` It's kind of annoying since I want to be able to authenticate the candidate on both versions. What can I do ?

Original source