<?php

namespace App\Models;

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

class DownloadLog extends Model
{
    use HasFactory;
    /**
     * 表示模型不使用 created_at 和 updated_at 时间戳
     * 因为我们使用自定义的 downloaded_at 字段
     *
     * @var bool
     */
    public $timestamps = false;

    /**
     * 可批量赋值的属性
     *
     * @var array<int, string>
     */
    protected $fillable = [
        'document_id',
        'user_id',
        'downloaded_at',
        'ip_address',
    ];

    /**
     * 应该被转换为日期的属性
     *
     * @var array<int, string>
     */
    protected $casts = [
        'downloaded_at' => 'datetime',
    ];

    /**
     * 获取下载日志关联的文档
     */
    public function document(): BelongsTo
    {
        return $this->belongsTo(Document::class);
    }

    /**
     * 获取下载日志关联的用户
     */
    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }
}