crm-server/app/service/UserService.php

<?php

namespace app\service;

use app\model\User;
use app\model\UserSn;

class UserService
{
    /**
     * 更新用户sn
     * @param $sn
     * @param $email
     */
    public static function updateSn($sn, $email)
    {
        $user = User::first()
            ->where('email',$email)
            ->first();
        return $user;
        if(!$user){
            return false;
        }
        if($user->sn != $sn){
            UserSn::where(['sn' => $user->sn])->update(['user_id' => 0]);
            UserSn::where(['sn' => $sn])->update(['user_id' => $user->id]);
            $user->sn = $sn;
            $user->save();
        }
        return $user;
    }
}