定义：路径中的id不是轨道中的id 3

我将一个Merb应用程序移植到Rails 3.在Merb中，我们可以在路径周围放置一个Identify块以定义如何提供：id路径参数例如，定义：路径中的id不是轨道中的id 3

# 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 "https://stackoverflow.com/users/:id", :action => "show", :as => "show_user" 
    get "https://stackoverflow.com/users/:id/edit", :action => "edit", :as => "edit_user" 
    put "https://stackoverflow.com/users/:id", :action => "update", :as => "update_user" 
    post "/users", :action => "create", :as => "create_user" 
end

在Rails，如Merb的，您可以覆盖to_param提供价值路线的替代ID，但要使用你想使用一个id，另一次一次的情况下，对同一物体采用不同的方法（如上所述），识别方便。什么是Rails 3的等价物？我查看了Rails 3源代码并进行了测试，结果没有看到与Identify等价的任何内容。我错过了吗？

我可以重构的东西，也许应该不需要它在这种情况下，但我仍然想知道如果我错过了什么。

谢谢。

来源

2010-09-29 m7d

我很好奇，如果你曾经找到一个很好的方法来实现这个功能。 – dmkash 2011-07-04 21:32:42

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，to_param仅在将记录传递给url助手时才会调用;如果你传递一个字符串，它只会解析字符串。

来源

2011-08-16 19:43:43

定义：路径中的id不是轨道中的id 3

回答

相关问题