zh_esign/app/Models/Contract.php

<?php

namespace App\Models;

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

/**
 * App\Models\Contract
 *
 * @mixin \Eloquent
 */
class Contract extends Model
{
    use HasFactory;
    protected $guarded = ['id', 'updated_at', 'created_at'];


    /**
     * The table associated with the model.
     *
     * @var string
     */
    protected $table = 'contracts';

    /**
     * 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');
    }
}