title: Where is this "posts_path" variable defined?
body: <p>I'm following <a href="http://guides.rails.info/getting_started_with_rails.html" rel="nofollow noreferrer">this tutorial</a> (seems good) for Rails. After I run</p>
  
  <pre><code>ruby script/generate scaffold Post
  </code></pre>
  
  <p>then this link works in one of the erb files:</p>
  
  <pre><code>&lt;%= link_to "My Blog", posts_path %&gt;
  </code></pre>
  
  <p><strong>WHY?</strong> I've looked for "posts_path" in the whole app and it's nowhere to be found. On the other hand, this</p>
  
  <pre><code>&lt;%= link_to "My Blog", home_path %&gt;
  </code></pre>
  
  <p>does <strong>not</strong> work, and it's also a Controller. </p>
  
  <p>Where is the <code>posts_path</code> defined?</p>