You are using an old version of the tutorial.
If you are using devise 2.0 or higher, follow these steps:
1º in config/initializers/devise.rb
require "omniauth-facebook" config.omniauth :facebook, "YOUR_APP_ID", "YOUR_APP_SECRET", :strategy_class => OmniAuth::Strategies::Facebook
2º You must set these gems:
gem 'omniauth' gem 'omniauth-facebook' gem 'oauth2'
3º in your user.rb module add model :omniauthable sth like:
class User # Include default devise modules. Others available are: # :token_authenticatable, :encryptable, :confirmable, :lockable, :timeoutable, :omniauthable and :invitable devise :database_authenticatable, :registerable, :confirmable, :recoverable, :rememberable, :trackable, :validatable, :omniauthable end
4º in routes.rb
devise_for :users, :controllers => { :omniauth_callbacks => "users/omniauth_callbacks", :registrations => "registrations" } do
5º Create a users folder inside your controllers folder and after you have to create a file in app/controllers/users/omniauth_callbacks_controller.rb
In this omniauth_callbacks_controller.rb
class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController def facebook # with this code you can see the data sent by facebook omniauth = request.env["omniauth.auth"] @user = User.find_for_facebook_oauth(request.env["omniauth.auth"], current_user) if @user.persisted? flash[:notice] = I18n.t "devise.omniauth_callbacks.success", :kind => "Facebook" sign_in_and_redirect @user, :event => :authentication else session["devise.facebook_data"] = request.env["omniauth.auth"] redirect_to new_user_registration_url end end end
6º In your user.rb model , add two of these methods to the end:
def self.find_for_facebook_oauth(auth, signed_in_resource=nil) user = User.where(:provider => auth.provider, :uid => auth.uid).first unless user user = User.create(name:auth.extra.raw_info.name, provider:auth.provider, uid:auth.uid, email:auth.info.email, password:Devise.friendly_token[0,20] ) end user end def self.new_with_session(params, session) super.tap do |user| if data = session["devise.facebook_data"] && session["devise.facebook_data"]["extra"]["user_hash"] user.email = data["email"] end end end
7º Finally, you should add a link to connect with facebook:
In devise/registrations/new.html.erb you should add:
<%= link_to "Sign in with Facebook", user_omniauth_authorize_path(:facebook) %>
what all. Hope this helps! Relations