<?php

namespace App\Models\Documents;

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

/**
 * 문서 레벨 연결 (실제 문서 작성 시 연결된 대상 기록)
 */
class DocumentLink extends Model
{
    protected $table = 'document_links';

    public $timestamps = false;

    protected $fillable = [
        'document_id',
        'link_id',
        'linkable_id',
        'sort_order',
        'created_at',
    ];

    protected $casts = [
        'sort_order' => 'integer',
    ];

    public function document(): BelongsTo
    {
        return $this->belongsTo(Document::class, 'document_id');
    }

    public function linkDefinition(): BelongsTo
    {
        return $this->belongsTo(DocumentTemplateLink::class, 'link_id');
    }
}