verify转向其他controller

  verify :session => :user,
    :add_flash => { :notice => "请先登录，谢谢合作！"},
    :redirect_to => { :action => "/shop/login"}

想转向shop控制器 当前是member控制器

请问怎么做啊?

像上面代码那样会报

Routing Error

no route found to match "/member_center//shop/login" with {:method=>:get}

这样的错误...