EDIT
The problem is that when a user updates his ad and does not upload a picture the form blanks the field.
Here is the Resource2formit snippet I use:
<?php
if (isset($_GET['resId'])){
if ($doc=$modx->getObject('modResource',array('id'=>$_GET['resId']))){
$docarray=$doc->toArray();
$fields = explode(',',$scriptProperties['resource2formitfields']);
$fields[] = 'id';
foreach ($fields as $field){
if ($doc->getFieldName($field) === null) {
/* if field isnt defined, look for TV value */
$tvValue = $doc->getTVValue($field);
if ($tvValue !== null) {
$hook->setValue($field,$tvValue);
}
} else {
/* otherwise get field value */
$hook->setValue($field,$docarray[$field]);
}
}
}
//$errorMsg = '<pre>'.print_r($docarray,true).'</pre>';
//$hook->addError('error_message',$errorMsg);
}
return true;
