public function groupCount($userIds)
{
$models = (new \Yii\db\Query())->select(['user_id', 'count(*) as count'])->from(Member::tableName())->groupBy('user_id')->all();
$groupData = [];
foreach ($models as $value) {
$groupData[$value['user_id']] = $value['count'];
}
return $groupData;
}
