title: Error on search filter for react ant design table
body: <p>Table throws <code>TypeError: Cannot read property 'toString' of undefined[object Object]</code>
  whenever I am doing a search on the field. I've attached a
  <a href="https://codesandbox.io/s/r048zp13n" rel="nofollow noreferrer">code sample</a></p>
  
  <p>Can anyone tell me what have I done wrong?</p>