Omniauth + Omniauthfacebook

für

app/controllers/users/omniauth_callbacks_controller.rb

@@ -0,0 +1,15 @@
+
+class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
+  def facebook
+    # You need to implement the method below in your model (e.g. app/models/user.rb)
+    @user = User.find_for_facebook_oauth(request.env["omniauth.auth"], current_user)
+
+    if @user.persisted?
+      sign_in_and_redirect @user, :event => :authentication #this will throw if @user is not activated
+      set_flash_message(:notice, :success, :kind => "Facebook") if is_navigational_format?
+    else
+      session["devise.facebook_data"] = request.env["omniauth.auth"]
+      redirect_to new_user_registration_url
+    end
+  end
+end

app/models/user.rb

@@ -30,10 +30,29 @@ class User < ActiveRecord::Base
   # :token_authenticatable, :confirmable,
   # :lockable, :timeoutable and :omniauthable
   devise :database_authenticatable, :registerable,:confirmable,
-         :recoverable, :rememberable, :trackable, :validatable
+         :recoverable, :rememberable, :trackable, :validatable,:omniauthable, :omniauth_providers => [:facebook]
 
   # Setup accessible (or protected) attributes for your model
-  attr_accessible :email, :password, :password_confirmation, :remember_me
+  attr_accessible :email, :password, :password_confirmation, :remember_me, :provider, :uid, :name
   # attr_accessible :title, :body
-
+	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"]["raw_info"]
+        user.email = data["email"] if user.email.blank?
+      end
+    end
+  end
+  
 end