如何确定用户名不会与现有路由冲突？ [英] How can you make sure a username won't conflict with an existing route?

问题描述

因此，我想在我的网站上使用 http://foobar.com/hadees 这样的网址，转到某人的个人资料。但是，在注册用户名时，如何确定它们不会选择与现有路由冲突的内容？

So I'd like to have urls on my site like http://foobar.com/hadees that goes to someone's profile. However when registering usernames how do I make sure they don't pick something that will conflict with my existing routes?

我猜我需要获取现有路线，但我不确定该怎么做。

I'm guessing I need to get a list of the existing routes but I'm not sure how to do it.

推荐答案

一个简短的Google搜索结果就是：

A short google search gives me that:

http://henrik.nyh.se/2008/10/validating-slugs-against-existing-routes-in-rails

在rails 3中方法已移至Rails.application.routes.recognize_path

In rails 3 the method has moved to Rails.application.routes.recognize_path

所以我总结一下：

class User < ActiveRecord::Base
  validates_format_of :name, :with => /\A[\w-]+\Z/
  validates_uniqueness_of :name
  validate :name_is_not_a_route

protected

  def name_is_not_a_route
    path = Rails.application.routes.recognize_path("/#{name}", :method => :get) rescue nil
    errors.add(:name, "conflicts with existing path (/#{name})") if path && !path[:username]
  end

end

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