Circular dependency detected while autoloading constant User
devise, omniauth, ruby, ruby-on-rails, rubygems
Solution
Where was your `registrations_controller.rb` saved to? The location is important. I found that I was making a mistake saving it to `app/controllers/devise/.`. It simply needed to be saved in `app/controllers/.` e.g.:
`app/controllers/registrations_controller.rb`
Also, `config/routes.rb` route should be defined as:
`devise_for :users, controllers: { registrations: 'registrations' }`
Problem
I've followed this tutorial (http://railscasts.com/episodes/236-omniauth-part-2) for creating facebook login with OmniAuth and Devise and I get this error: Circular dependency detected while autoloading constant User in my routes.rb ``` devise_for :users , :controllers => {:registrations => 'registrations'} ``` registrations_controller.rb ``` Class RegistrationsController < Devise::RegistrationsController def create super session[:omniauth] = nil unless @user.new_record? end private def build_resource(*args) super if session["devise.omniauth"] @user.apply_omniauth(session["devise.omniauth"]) session["devise.omniauth"] = nil end end end ``` and here's my create method from AuthenticationsController ``` def create omniauth = request.env["omniauth.auth"] authentication = Authentication.find_by_provider_and_uid(omniauth['provider'], omniauth['uid']) if authentication flash[:notice] = "Signed in successfully." sign_in_and_redirect(:user, authentication.user) elsif current_user current_user.authentications.create!(:provider => omniauth['provider'], :uid => omniauth['uid']) flash[:notice] = "Authentication successful." redirect_to authentications_url else user = User.new user.apply_omniauth(omniauth) if user.save flash[:notice] = "Signed in successfully." sign_in_and_redirect(:user, user) else session[:omniauth] = omniauth.except('extra') redirect_to new_user_registration_url end end end ```