title: Dynamic path symfony
body: <p>I have this code:</p>
  
  <pre><code>href="{{ path('new') }}"
  </code></pre>
  
  <p>Now is necessary use one variable in this section:</p>
  
  <pre><code>href="{{ path(item.ruta) }}"
  </code></pre>
  
  <p>But this show a error:</p>
  
  <blockquote>
    <p>An exception has been thrown during the rendering of a template
    ("Unable to generate a URL for the named route "" as such route does
    not exist.").</p>
  </blockquote>
  
  <p>How can solution this problem?</p>