title: django-rest-framework: Unknown command: 'generateschema'
body: <p>Executed the command according to the <a href="https://www.django-rest-framework.org/api-guide/schemas/#quickstart" rel="nofollow noreferrer">documentation</a>:</p>
  <pre><code>python.exe manage.py generateschema &gt; schema.yml
  </code></pre>
  <p>But instead of YAML got an error:</p>
  <blockquote>
  <p>Unknown command: 'generateschema'</p>
  <p>Type 'manage.py help' for usage.</p>
  </blockquote>
  <p>Package versions:</p>
  <ul>
  <li>Django 2.1</li>
  <li>PyYAML 3.13</li>
  <li>coreapi 2.3.3</li>
  <li>djangorestframework 3.8.2</li>
  </ul>