public function selectOptions()
{
$query = Soldier::find();
$arr = $query->select(['id', 'name', 'nickname'])->asArray()->all();
$soldiers = ['' => 'Обрати'];
foreach ($arr as $soldier) {
$soldiers[$soldier['id']] = "{$soldier['nickname']} ({$soldier['name']})";
}
return $soldiers;
}
