jili2/application/common/validate/Security.php

<?php
namespace app\common\validate;

use think\Db;
use think\Validate;

class Security extends Validate{

    protected $rule = [
        'title|名称'  =>  'require|length:1,40',
        'sn|设备编号'  =>  'require|checkUnique',
//        'img'  =>  'require',
    ];

    protected $message = [
//        'img.require'  =>  '请上传图片',
    ];


    public function checkUnique($value, $rule, $data=[]){
        if(isset($data['id']) && $data['id'] > 0){
            $ret = Db::name('security')->where('sn',$data['sn'])->where('id','<>',$data['id'])->where('del',0)->find();
        }else{
            $ret = Db::name('security')->where('sn',$data['sn'])->where('del',0)->find();
        }

        return $ret?'设备编号已被使用':true;
    }


}