LMS/app/Models/TestAttempt.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 TestAttempt extends Model
{
    use HasFactory;

    protected $fillable = [
        'test_id',
        'user_id',
        'started_at',
        'finished_at',
        'score',
        'correct_answers',
        'total_questions',
        'passed',
        'feedback',
    ];

    protected $casts = [
        'started_at' => 'datetime',
        'finished_at' => 'datetime',
        'passed' => 'boolean',
    ];

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

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

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