title: Rails don't see paths to the other controller
body: <p>I've made a two controllers(users and posts) using scaffold. Then i edited routes.rb in this way </p>
  
  <pre><code>resouces :users do
    resources :posts
  end
  </code></pre>
  
  <p>While i put <code>link_to 'Posts', user_posts</code> (<code>user_post</code> is showing in <code>rake routes</code>) in any users view file rails says <code>undefined local variable or method 'user_posts'</code>. And in posts views <code>link_to 'Users', users</code> not working too. What i've made wrong? </p>