How to display the signature of a user to a detail views.

[xycofryx]

Joomla 3.8.11 Fabrik 3.8.1

How do I insert the signature of the user in a modified details view with only the user_id:

e.g. I have a table users with the field digsig and another table named permit with a field called sinature of approval, I was thinking that:

$signature    = $this->groups['Users']->elements['signature'];

will work but then again, I was thinking of

$approver= $this->groups['Permit']->elements['approver'];
$approver_id = $approver->element_raw;
$db_approver = JFactory::getDbo();
$query_approver = $db_approver->getQuery(true);
$query_approver->select(array('user_id','signature'));
$query_approver->from($db_approver->quoteName('users_system'));
$query_approver->where($db_approver->quoteName('user_id')." = ".$db_approver->quote($approver_id));
$db_approver->setQuery($query_approver);
$signature= $db_approver->loadAssoc();

<div class="signature">
    <div class="fabrikElementReadOnly" >
        <div id="permitting_ltp___signature_ro_sig" class="oc_sigPad signed">
            <div class="sigWrapper" style="height:150px;">
                <canvas class="pad" width="383" height="193" pf-dataurl-index="0">
                    <?php echo strip_tags(trim($signature['signature']));?>
                </canvas>
            </div>
        </div>
    </div>
</div>

Is there any method easier than this one?

Thanks