How to show AccessDenied errors on the active page with CanCan in Rails3

问题

I am trying to find a way to display my flash errors on the active page without the redirect_to method.

By the way, the standard flash[:alert] = exception.message didn't show me any error messages, so I changed it to flash[:error].

Thanks for any advice!

rescue_from CanCan::AccessDenied do |exception|  
    flash[:error] = exception.message  
    redirect_to deadlines_path  
end

回答1:

Try:

rescue_from CanCan::AccessDenied do |exception|
  flash.now[:alert] = exception.message
  render 'something_else'
  return false
end

without a redirect.

来源：https://stackoverflow.com/questions/4767460/how-to-show-accessdenied-errors-on-the-active-page-with-cancan-in-rails3