title: django rest swagger nested serializers not rendered properly
body: <p><a href="https://i.stack.imgur.com/eyBoY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eyBoY.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/pWEDT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pWEDT.png" alt="enter image description here"></a></p>
  
  <p>The swagger ui doesn't render the detail fields in Title object, how can i fix this?</p>