txx2023/app/model/GoodBasic.php

<?php
declare (strict_types = 1);

namespace app\model;

use think\Model;

/**
 * @mixin \think\Model
 */
class GoodBasic extends Model
{
       public function brand(){
        return $this->belongsTo(Brand::class,'brand_id','id')->bind(['brand_name']);
    }

    public function category(){
        return $this->belongsTo(Cat::class,'cat_id','id')->bind(['cat_name','cat_search'=>'search']);
    }

    public function Unit(){
        return $this->belongsTo(Unit::class,'good_unit','id')->bind(['unit_name'=>'unit']);
    }
}