app-api/app/Models/Goodtest.php

<?php
namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Goodtest extends Model{

    protected $table='goods_all';

//    public function goods_spec(){
//        return $this->hasMany(GoodSpec::class,'goods_id');
//    }

    public function get_order(){
        return $this->belongsTo(OrderDetail::class,'goods_id','id');
    }

    public function getPrice(){

    }
}