function actionChat()
 {
     $userid = $this->userid;
     //管理员的userid
     $page = $this->get('page', 1);
     $limit = $this->get('limit', 20);
     $exArr = array('page' => $page, 'limit' => $limit, 'order' => 'id desc', 'fields' => 'id,userid,targetid friendid,content msg,ctime');
     //lastime
     if (1) {
         $MMessage = $this->LoadApiModel('message');
         $date = $this->get('date');
         list($date_start, $date_end) = CTime::DeltaMonths(-1);
         // echo "$date_start, $date_end";
         $date = $date ? $date : $date_start;
         $friendid = $this->get('id');
         if ($friendid) {
             //我与指定好友的消息(也就是我发给别人的)
             $whArr = array('type' => 0, 'targetid in' => array($friendid, $userid), 'removed>' => -1);
             $messArr = $MMessage->getMessages(null, $whArr, $exArr);
         } else {
             //别人发给我的
             $whArr = array('type' => 0, 'or' => array('userid' => $userid, 'targetid' => $userid), 'removed>' => -1);
             // $exArr['fields'] .= ',max(ctime) lastime';
             // $exArr['group']   = 'userid,targetid';
             $messArr = $MMessage->getLastMessages($userid, $page);
             // print_r($messArr);
             $messArr = array('data' => $messArr, 'total' => count($messArr));
         }
         CFun::removeArrayNull($whArr);
         // print_r($whArr);
         // print_r($messArr);
         if (false !== $messArr) {
             if (isset($messArr['data'])) {
                 $MUser = $this->LoadApiModelMedical('user');
                 $uid_fild = $friendid ? 'userid' : 'friendid';
                 $fid_arr = $this->getArrayColumn($messArr['data'], $uid_fild);
                 $userArr = $MUser->getUsers($fid_arr, null, array('limit' => count($fid_arr), 'only_data' => true, 'fields' => 'id,username,idcard,mobile'));
                 if ($friendid) {
                     $messArr['data'] = $this->joinToArray($messArr['data'], $userArr, 'userid:id', 'user');
                 } else {
                     $messArr['data'] = $this->joinToArray($messArr['data'], $userArr, 'friendid:id', 'user');
                 }
             }
             $this->response($messArr);
         }
     }
     $this->error('没有任何消息');
 }