erp/app/Models/GoodsSku.php

<?php

namespace App\Models;

class GoodsSku extends Model
{
    /**
     * 不可批量赋值的属性。为空则所有熟悉都可以批量赋值
     *
     * @var array
     */
    protected $guarded = [];

    protected $hidden = ['goods_id', 'created_at'];

    /**
     * 此规格从属于一个商品
     */
    public function goods()
    {
        return $this->hasOne(Goods::class, 'id', 'goods_id');
    }
}