I have a problem with nested routes which don't display correct url.

I use the be开发者_如何学JAVAlow code, but it renders something like:

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

instead of:

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

for every microposts displayed in the user show pages.

Associations

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

routes

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 %>

I can't see where I am wrong. Thank a lot for your help!

EDIT

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

Routes:

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"}

You need to pass in @micropost as well:

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

You could also shorten it to:

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