Warning: Undefined property: Drupal\views\ResultRow::$draggableviews_structure_parent

The condition !empty($row->draggableviews_structure_parent) will return true if the property is not empty, which is the opposite of what you want.
created MR!23 for the issue mentioned, please review.
Thank you.

Couldn't reproduce the issue with last version.

Version used: 2.1.3

Steps to reproduce in case it still happens.

ChatGPT

The empty() function already checks for null, false, empty strings, empty arrays, and zero values, so there's no need to check for false and empty separately.

So it looks like we can just simplify this.

Automatically closed - issue fixed for 2 weeks with no activity.