title: How to consult value of field with ant-design useForm?
body: <p>I have this form which I would like to show or hide fields depending on the value of other field(s) that are fix (they never hide) but using <code>form.getFieldValue("some-field")</code> always return <code>undefined</code>.</p>
  
  <p>Here is a minimal functional example that showcase the issue I have:</p>
  
  <p><a href="https://codesandbox.io/s/loving-almeida-tb1h2?fontsize=14&amp;hidenavigation=1&amp;theme=dark" rel="nofollow noreferrer"><img src="https://codesandbox.io/static/img/play-codesandbox.svg" alt="Edit loving-almeida-tb1h2"></a></p>
  
  <p>What am I doing wrong with antd and how can I achieve my use case?</p>