<?php

declare(strict_types=1);

namespace App\Models;

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

final class QuestionCategory extends Model
{
    protected $fillable = ['question_bank_id', 'parent_id', 'name', 'sort'];

    public function bank(): BelongsTo
    {
        return $this->belongsTo(QuestionBank::class, 'question_bank_id');
    }

    public function children(): HasMany
    {
        return $this->hasMany(self::class, 'parent_id');
    }
}