public function actionAdd()
 {
     if (Yii::$app->user->getIdentity()->admin != 1 || Yii::$app->user->getIdentity()->sa != 1) {
         Yii::$app->getSession()->setFlash('success', NULL);
         Yii::$app->getSession()->setFlash('error', "对不起,你没有权限!");
         return $this->redirect(array('index'));
     }
     $gid = Yii::$app->request->post()["gid"];
     $gname = Yii::$app->request->post()["gname"];
     $uid_array = array();
     $success_msg = "未选择用户!";
     if (array_key_exists("selection", Yii::$app->request->post())) {
         $success_msg = "添加用户成功:";
         $tm = date('Y-m-d H:i:s');
         foreach (Yii::$app->request->post()["selection"] as $k => $v) {
             $dcmd_user_group = new DcmdUserGroup();
             $dcmd_user_group->uid = $v;
             $dcmd_user_group->gid = $gid;
             $dcmd_user_group->comment = "comment";
             $dcmd_user_group->utime = $tm;
             $dcmd_user_group->ctime = $tm;
             $dcmd_user_group->opr_uid = Yii::$app->user->getId();
             $dcmd_user_group->save();
             $success_msg .= $v . " ";
             $this->oprlog(1, "add user:{$v} group:{$gid}");
         }
     }
     Yii::$app->getSession()->setFlash('success', $success_msg);
     return $this->redirect(array('dcmd-group/view', 'id' => $gid, 'show_div' => 'dcmd-group-user'));
 }