laravel_sketch/app/Models/Goods/GoodsSku.php

<?php

namespace App\Models\Goods;

use App\Base\BaseModel;
use Illuminate\Database\Eloquent\SoftDeletes;

class GoodsSku extends BaseModel
{
    use SoftDeletes;

    protected $table = "goods_sku";

    protected $casts = [
        "spec_attr_list" => "array",
    ];

    public function format(...$options)
    {

    }
}