通过Javascript登录Facebook

Question

我已经在同一页面上使用Facebook弹出窗口成功登录。

我已经检查了响应response.status === 'connected' ，它的确是真的。

 $('#sign_in').on('click', function (e) {
        e.preventDefault();

        FB.login(function(response){

        });

        FB.getLoginStatus(function(response) {
            statusChangeCallback(response);
        });

        function statusChangeCallback(response) {

            if (response.status === 'connected') {
                // Logged into your app and Facebook.
            } else if (response.status === 'not_authorized') {
                // The person is logged into Facebook, but not your app.
            } else {
                // The person is not logged into Facebook, so we're not sure if
                // they are logged into this app or not.
            }
        }


    }); 

现在的问题是，我怎样才能通过devise主动登录？ 我已经将路线设置为：

devise_for :users, :controllers => { :omniauth_callbacks => "callbacks" }

并且我添加了回调控制器：

class CallbacksController < Devise::OmniauthCallbacksController

  def facebook

    puts "FACEBOOK CALLBACK"
    # You need to implement the method below in your model (e.g. app/models/user.rb)
    @user = User.from_omniauth(request.env["omniauth.auth"])

    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

  def failure
    redirect_to root_path
  end

end

但是我注意到没有调用回调，请指教！

编辑：这是在Facebook上测试应用程序的基本设置：