<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class Quiz extends Model {
    protected $fillable = ['subject_id','title','description','active'];
    protected $casts    = ['active' => 'boolean'];
    public function subject()   { return $this->belongsTo(Subject::class); }
    public function questions() { return $this->hasMany(QuizQuestion::class)->orderBy('sort_order'); }
    public function attempts()  { return $this->hasMany(QuizAttempt::class); }
}