如何避免redirect_to循环：返回？

Question

我在过滤器之前使用这个助手

def has_current_firm
 if current_firm.nil?
   flash[:warning] = t :error_msg
   redirect_to :back
 end
end

但是，有时它会潜入无限循环 什么是最简单的方法来确保引用的控制器不等于当前？

Answer 1

这不是答案，只是一个注释。

Rails 5有redirect_back：

redirect_back fallback_location: { action: "show", id: 5 }
redirect_back fallback_location: post
redirect_back fallback_location: "http://www.rubyonrails.org"
redirect_back fallback_location:  "/images/screenshot.jpg"
redirect_back fallback_location:  articles_url
redirect_back fallback_location:  proc { edit_post_url(@post) }

其来源：

def redirect_back(fallback_location,, **args)
  if referer = request.headers["Referer"]
    redirect_to referer, **args
  else
    redirect_to fallback_location, **args
  end
end