mingde-bd/application/common/validate/GGoodsCate.php

<?php
namespace app\common\validate;

use think\Validate;
use think\Db;
class GGoodsCate extends Validate{

    protected $rule = [
        'title|名称'  =>  'require|length:1,30',
    ];

    /**
     * 定义错误信息
     * 格式：'字段名.规则名' =>  '错误信息'
     *
     * @var array
     */
    protected $message = [];

    protected function checkUnique($value, $rule, $data=[]){
        if(isset($data['id']) && $data['id'] > 0){
            $ret = Db::name('g_goods_cate')
                ->where('title',$data['title'])
                ->where('org_id',$data['org_id'])
                ->where('id','<>',$data['id'])
                ->find();
        }else{
            $ret = Db::name('g_goods_cate')
                ->where('title',$data['title'])
                ->where('org_id',$data['org_id'])
                ->find();
        }

        return $ret?'名称已被使用':true;
    }
}