Railscast #236 extension with Fb_graph

user.rb

# app/models/user.rb

def apply_omniauth(omniauth)
  case omniauth['provider']
  when 'facebook'
    self.apply_facebook(omniauth)
  end
  authentications.build(:provider => omniauth['provider'], :uid => omniauth['uid'], :token =>(omniauth['credentials']['token'] rescue nil))
end

def facebook
  @fb_user ||= FbGraph::User.me(self.authentications.find_by_provider('facebook').token)
end


protected

def apply_facebook(omniauth)
  if (extra = omniauth['extra']['user_hash'] rescue false)
    self.email = (extra['email'] rescue '')
  end
end