/**
* @param EMongoCriteria $criteria
* @param string $group
* @return array
*/
public function findAllIds(EMongoCriteria $criteria = null, $group = '')
{
$id = property_exists($this, 'id') ? 'id' : '_id';
$select = [$id];
if ($group) {
array_push($select, $group);
}
$cursor = $this->findAllAsArray($criteria->select($select));
return $group ? ArrayHelper::groupByAttribute($cursor, $group, $id) : ArrayHelper::pickAttribute($cursor, $id, false);
}
