title: Wix—Operation (setFilter) not allowed on write-only dataset
body: <p>I'm trying to follow this tutorial here: <a href="https://www.youtube.com/watch?v=Hx7_8-lRsW0" rel="nofollow noreferrer">https://www.youtube.com/watch?v=Hx7_8-lRsW0</a></p>
  
  <p>But I'm hitting an error:</p>
  
  <p><code>Operation (setFilter) not allowed on write-only dataset</code></p>
  
  <p>Can someone explain how datasets work, and how I can execute <code>.setFilter()</code>?</p>
  
  <p>My code:</p>
  
  <pre><code>import wixData from "wix-data";
  
  $w.onReady(function () {
      wixData.query('collectionName');
  });
  
  let debounceTimer;
  export function iTitle_keyPress(event, $w) {
      console.log('hello');
      if(debounceTimer) {
          clearTimeout(debounceTimer);
          debounceTimer = undefined;
      }
      debounceTimer = setTimeout(() =&gt; {
          filter($w('#iTitle').value);
      }, 200);
  }
  
  let lastFilterTitle;
  function filter(title) {
      console.log(title);
      if(lastFilterTitle !== title) {
          $w('#dataset1').setFilter(wixData.filter().contains('name',title));
          lastFilterTitle = title;
      }
  }
  </code></pre>