/**
* Get the list of extra data from the $record as saved into it by
* {@see Form::saveInto()}
*
* Handles detection of falsey values explicitly saved into the
* DataObject by formfields
*
* @param DataObject $record
* @param SS_List $list
* @return array List of data to write to the relation
*/
protected function getExtraSavedData($record, $list)
{
// Skip extra data if not ManyManyList
if (!$list instanceof ManyManyList) {
return null;
}
$data = array();
foreach ($list->getExtraFields() as $field => $dbSpec) {
$savedField = "ManyMany[{$field}]";
if ($record->hasField($savedField)) {
$data[$field] = $record->getField($savedField);
}
}
return $data;
}
