Devise omniauthable breaks Omniauth authentication with `Could not find a valid mapping for path`

Question

In my project, I have two type of users: job seekers and hiring managers. Job seekers don\'t have a model, they are just able to apply for jobs using the data received from

Answer 1

Answering my own question. So, final decision was to go with pure Omniauth implementation. I removed :omniauthable from User model, removed config.omniauth... from devise.rb, removed :omniauth_callbacks devise routes from routes.rb. So, all users (no matter what role) would use ame callback routes and hit sessions_controller#authenticate_jobseeker action (should consider renaming the action?):

def authenticate_jobseeker
  auth_hash = request.env['omniauth.auth']

  unless auth_hash.present?
    redirect_to request.env['omniauth.origin'] || root_path, alert: "Sorry, we were not able to authenticate you" and return
  end

  @user = User.find_from_oauth(auth_hash)
  if @user.present?
    flash[:notice] = I18n.t "devise.omniauth_callbacks.success", :kind => "Google"
    sign_in_and_redirect @user, :event => :authentication and return
  else
    session[:jobseeker] = auth_hash["info"]
    if valid_job_seeker?
      redirect_to new_job_application_path(...)
    end
  end
end

and User.find_from_oauth:

def self.find_from_oauth(auth_hash)
  if auth_hash
    user = User.where(:email => auth_hash["info"]["email"]).first
  end
  user
end

This implementation satisfied all of the requirements.