topnotch_website/app/Models/ServiceFile.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\SoftDeletes;

class ServiceFile extends Model
{
    use HasFactory, SoftDeletes;

    protected $fillable = [
        'code',
        'product_service_id',
        'name',
        'width',
        'height',
        'unit',
        'setup_number',
    ];

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