Routing error - uninitialized constant
问题 I could not fix this in Rails 3.2.12, maybe I am missing something. config/routes.rb get "home/index" root :to => "home#index" devise_for :users, :only => :omniauth_callbacks match 'users/auth/:provider/callback' => 'authentications#create' match '/auth/:provider/signout' => 'authentications#signout' app/controllers/authentication_controller.rb class AuthenticationsController < ApplicationController ... end app/models/authentication.rb class Authentication < ActiveRecord::Base ... end I think