parking_manage_system/app/Models/AdminOperationLog.php

<?php

namespace App\Models;

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

class AdminOperationLog extends Model
{

    /**
     * 可批量赋值的属性
     * @var array
     */
    protected $fillable
        = [
            'user_id',
            'action',
            'model_type',
            'model_id',
            'ip',
            'description',
            'old_values',
            'new_values',
        ];

    /**
     * 属性类型转换
     * @var array
     */
    protected $casts
        = [
            'old_values' => 'json',
            'new_values' => 'json',
        ];

    protected $table = 'admin_operation_log';

    /**
     * 获取进行此操作的用户
     */
    public function user()
    {
        return $this->belongsTo(User::class);
    }

    /**
     * 获取关联的模型
     */
    public function model()
    {
        return $this->morphTo();
    }
}