BEGINNER: simple link_to / routing - ruby-on-rails-3

Question

I'm really starting to cry here ;) Trying to make a link in a Models index view.
I have 2 simple Models: Users and Posts. There both generated with scaffolding and have working joins. A user has_many :posts and a post belongs_to :user.
What I'm trying to do in the views/post/index.html.er file is a list of the Post title and the user who it belongs to. It works well (also learning html5):
<% #posts.each do |post| %>
<p><%= link_to post.user.name, users_path %>: <b><%= post.title %></b></p>
<% end %>
Well, it works but the "users_path" is not what I want. I want to link to the specific User which the post belongs_to. I'm sorry to say that I don't get much help from http://guides.rubyonrails.org/routing.html.
How should I do this? Do I have to specify a #user in the posts_controller index-action? I reallt appreciate long and detaild answears here.
Tnk soooo much for patience with a beginner ;)

Answer 1

you probably have this in your routes -
resources :posts do
resources :users
end
rake routes would generate the following mapping -
post_users GET /posts/:post_id/users(.:format) {:action=>"index", :controller=>"users"}
POST /posts/:post_id/users(.:format) {:action=>"create", :controller=>"users"}
new_post_user GET /posts/:post_id/users/new(.:format) {:action=>"new", :controller=>"users"}
edit_post_user GET /posts/:post_id/users/:id/edit(.:format) {:action=>"edit", :controller=>"users"}
post_user GET /posts/:post_id/users/:id(.:format) {:action=>"show", :controller=>"users"}
PUT /posts/:post_id/users/:id(.:format) {:action=>"update", :controller=>"users"}
DELETE /posts/:post_id/users/:id(.:format) {:action=>"destroy", :controller=>"users"}
posts GET /posts(.:format) {:action=>"index", :controller=>"posts"}
POST /posts(.:format) {:action=>"create", :controller=>"posts"}
new_post GET /posts/new(.:format) {:action=>"new", :controller=>"posts"}
edit_post GET /posts/:id/edit(.:format) {:action=>"edit", :controller=>"posts"}
post GET /posts/:id(.:format) {:action=>"show", :controller=>"posts"}
PUT /posts/:id(.:format) {:action=>"update", :controller=>"posts"}
DELETE /posts/:id(.:format) {:action=>"destroy", :controller=>"posts"}
The above explains the url you can use and what objects need to be passed.
For linking the user of the post -
<%= link_to "Post User details", post_user_path(post, post.user) %>
OR
<%= link_to "Post User details", url_for([post, post.user]) %>