youxiangjie/application/api/model/UsersModel.php

<?php
namespace app\api\model;
use think\Model;

class UsersModel extends Model
{
    protected $name = "Users";
    protected $rules = [
        'user_id' => 'require|number',
        'user_nickname' => 'require',
        'idcard' => 'require',
    ];
}