public static function getBranchList($id_user = null) { if ($id_user === null) { return ArrayHelper::map(Branch::find()->all(), 'id_branch', 'nm_branch'); } else { $query = UserToBranch::find()->with('idBranch')->where(['user_id' => $id_user]); return ArrayHelper::map($query->all(), 'id_branch', 'idBranch.nm_branch'); } }