/**
* 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;
}
/**
* Gets the table which contains the sort field.
*
* @param DataList $list
* @return string
*/
public function getSortTable(SS_List $list)
{
$field = $this->getSortField();
if ($list instanceof ManyManyList) {
$extra = $list->getExtraFields();
$table = $list->getJoinTable();
if ($extra && array_key_exists($field, $extra)) {
return $table;
}
}
$classes = ClassInfo::dataClassesFor($list->dataClass());
foreach ($classes as $class) {
if (singleton($class)->hasOwnTableDatabaseField($field)) {
return $class;
}
}
throw new Exception("Couldn't find the sort field '{$field}'");
}
