ruby-on-rails-3 - 在 route 将:id定义为不同于Rails 3中的id

Question

我正在将Merb应用移植到Rails3。在Merb中，我们可以在路由周围放置一个Identify块，以定义如何提供：id路由参数，例如，

# this is a Merb route that I want to port to Rails 3 routing; I get everything except 
# how to replicate the behavior of Merb's Identify block which doesn't require one to 
# futz with overriding to_param on user; a user instance gets passed to the url builder
# ala url(:edit_password_reset, user) and this tells the router to use the 
# reset_password_token method on user to supply the :id value for this one route
Identify User => :reset_password_token do
  match("/reset-password/:id", :method => :get).to(:controller => "password_resets", :action => "edit").name(:edit_password_reset)
end

# and then later define more routes that use the user's id without a problem 
# since to_param was not overridden on user; here I have already translated to 
# Rails 3 and this works fine
controller :users  do
  get "/register", :action => "new", :as => "new_user"
  get "/users", :action => "index", :as => "users"
  get "/users/:id", :action => "show", :as => "show_user"
  get "/users/:id/edit", :action => "edit", :as => "edit_user"
  put "/users/:id", :action => "update", :as => "update_user"
  post  "/users", :action => "create", :as => "create_user"
end

在Rails中，就像在Merb中一样，您可以重写to_param来为路线提供替代的id值，但是对于一种情况，您想一次使用id，而另一次则想对同一对象使用不同的方法（如上所述） ），识别起来很方便。什么是Rails 3等效项？我查看了Rails 3的源代码和测试，没有发现任何与Identify相同的东西。我想念吗？

我可以重构事物，也许在这种情况下可能不需要它，但是我仍然想知道我是否错过了什么。

谢谢。

Answer 1

我遇到了同样的问题；事实证明，最好的方法是在调用URL或路径时完全跳过to_param。例如：

# This will set params[:id] to @user.to_param
edit_password_reset_url(@user)

# This will set params[:id] to @user.reset_password_token
edit_password_reset_url(@user.reset_password_token)

换句话说，仅在将记录传递给url帮助器时才调用to_param。如果您将字符串传递给它，它将只解析该字符串。