title: What's the meaning of url path in form_for?
body: <p>A <code>copy</code> action and <code>copy.html.erb</code> are defined in our rails 3.2 app. This copy action is to copy from the current record, allowing user modify slightly and submit for creation just like <code>new</code>. Here is the header of the <code>copy.html.erb</code>: </p>
  
  <pre><code>&lt;%= form_for @engine_config, :as =&gt; :engine_config, :url =&gt; engine_configs_path do |f| %&gt;
  </code></pre>
  
  <p>After clicking <code>save</code>, it hits <code>create</code> in controller and this is what we wanted. </p>
  
  <p>Our question here is what the engine_configs_path stands for? Usually <code>engine_configs_path</code> is for index. Here the form is for create and is not index. What's the reasoning of this index path on create form? </p>