zh_food/app/Models/GoodsSku.php

<?php

namespace App\Models;

use DateTimeInterface;
use Illuminate\Database\Eloquent\Model;

/**
 * 商家商品规格表
 */
class GoodsSku extends Model
{
    /**
     * The table associated with the model.
     *
     * @var string
     */
    protected $table = 'goods_sku';

    /**
     * The primary key associated with the table.
     *
     * @var string
     */
    protected $primaryKey = 'id';

    /**
     * Indicates if the model should be timestamped.
     *
     * @var bool
     */
    public $timestamps = true;


    /**
     * 不能被批量赋值的属性
     *
     * @var array
     */
    protected $guarded = ['id', 'updated_at', 'created_at'];

    /**
     * 为数组 / JSON 序列化准备日期。
     *
     * @param DateTimeInterface $date
     * @return string
     */
    protected function serializeDate(DateTimeInterface $date)
    {
        return $date->format($this->dateFormat ?: 'Y-m-d H:i:s');
    }

}