computer-journal/app/Models/Computer.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Computer extends Model
{
    use HasFactory;
    protected $fillable = ['user_id', 'name', 'cpu', 'ram', 'motherboard', 'gpu', 'additional_info'];

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

}