blue-twilight/app/Photo.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Notifications\Notifiable;

class Photo extends Model
{
    use Notifiable;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'album_id',
        'name',
        'description',
        'file_name',
        'mime_type',
        'file_size',
        'metadata_version',
        'taken_at',
        'camera_make',
        'camera_model',
        'camera_software',
        'width',
        'height'
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
    ];

    public function album()
    {
        return $this->belongsTo(Album::class);
    }
}