blog/app/Models/Photo.php

<?php

namespace App\Models;

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

class Photo extends Model
{
    use HasFactory;

    protected $fillable = [
        'image_src',
        'description',
        'alt_text',
    ];

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