appadmin-demosss/app/Models/Orderdetail.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Orderdetail extends Model
{
    protected $table='order_detail';
    protected $fillable=['order_id','goods_id','num','money','goods_name','goods_size','remark','goods_price','goods_unit'];
    public function get_goods(){
        return $this->belongsTo(Goodtest::class,'goods_id','id');
    }
    public function order(){
        return $this->belongsTo(Ordertest::class,'order_id','id');
    }
}