LMS/app/Models/Question.php

<?php

namespace App\Models;

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

class Question extends Model
{
    use HasFactory;

    protected $fillable = [
        'test_id',
        'type',
        'question_text',
        'explanation',
        'score',
        'sort_order',
        'is_required',
    ];

    protected $casts = [
        'is_required' => 'boolean',
    ];

    public function test(): BelongsTo
    {
        return $this->belongsTo(Test::class);
    }

    public function answers(): HasMany
    {
        return $this->hasMany(Answer::class);
    }

    public function matchingPairs(): HasMany
    {
        return $this->hasMany(QuestionMatchingPair::class);
    }

    public function responses(): HasMany
    {
        return $this->hasMany(TestResponse::class);
    }
}