mes-sdai-server-api/application/admin/model/stock/Stockin.php

<?php

namespace app\admin\model\stock;

use think\Model;

class Stockin extends Model
{

    // 表名
    protected $name = 'stock_stockin';
    // 自动写入时间戳字段
    protected $autoWriteTimestamp = 'int';
    // 定义时间戳字段名
    protected $createTime = 'createtime';
    protected $updateTime = 'updatetime';
    // 追加属性
    protected $append = [];
    
    public function supplier()
    {
        return $this->hasOne('\app\admin\model\stock\Supplier', 'id', 'stock_supplier_id', [], 'LEFT')->setEagerlyType(0);
    }

    //生成入库编号
    public function createdocnum()
    {
        $nowdate = date('Ymd', time());
        do{
            $randstr=rand(1000,9999);
            $docnum='GHD' . $nowdate.$randstr;
            $result = self::where('docnum',$docnum)->count();
        }while($result>0);
        return $docnum;
    }
}