title: AutoFill fields in Laravel Backpack editEntity view
body: <p>Yoo everybody,
  I am using laravel backpack and I have a field in a table that I put some data as a json in it:</p>
  
  <pre><code>    $rules['checkin'] = $request-&gt;checkin;
      $rules['checkout'] = $request-&gt;checkout;
      $rules['cancellation_policy'] = $request-&gt;cancellation_policy;
  
      $request-&gt;merge(['rules' =&gt; json_encode($rules)]);
  </code></pre>
  
  <p>The problem is that I don't know how to inject the data into edit form and auto-fill the fields. If this is a normal controller I get the data and decode it and then send it to view with other variables but in this case, I need help.</p>