Rails 3 / 嵌套路由：在用户显示页面中重定向到微帖子集合的正确 url 时出现问题

Question

我遇到嵌套路由问题，无法显示正确的 url。

我使用下面的代码，但它呈现类似：

.../users/[:user_id]/microposts/[:user_id] 

而不是：

.../users/[:user_id]/microposts/[:micropost_id] 

对于用户显示页面中显示的每个微帖子。

关联

has_many :microposts #user model
belongs_to :users #micropost model

路由

resources :microposts, :only => [:create, :destroy]
resources :users, :only => [:show] do
  resources :microposts, :only => [:show]  
end

Microposts_controller

def show
  @user = User.find(params[:user_id])
  @micropost = @user.microposts.find(params[:id])
end

microposts/_micropost.html.erb

<%= link_to "show this micropost" user_micropost_url(@user) %> #link for every microposts displayed in the user show pages

user/show.html.erb

<%= render @microposts %>

我看不出我错在哪里。 非常感谢您的帮助！

编辑

if I use [@user, @micropost ] the displayed url is .../users/[:user_id]
if I use user_micropost_url(@user, @micropost) it renders an error:

No route matches {:action=>"show", :controller=>"microposts", :user_id=>#<User id: 1

路线：

user_micropost GET /users/:user_id/microposts/:id(.:format) {:action=>"show", :controller=>"microposts"}
microposts POST   /microposts(.:format) {:action=>"create", :controller=>"microposts"}
micropost DELETE /microposts/:id(.:format) {:action=>"destroy", :controller=>"microposts"}
user GET    /users/:id(.:format) {:action=>"show", :controller=>"users"}

Answer 1

您还需要传入@micropost：

<%= link_to "show this micropost", user_micropost_url(@user, @micropost) %> #link for every microposts displayed

您也可以将其缩短为：

<%= link_to "show this micropost", [@user, @micropost] %> #link for every microposts displayed