[Laravel] Use accessor with same field name.

laravel-use-accessor-with-same-fieldname.php

<?php

namespace App\\Models;

use Eloquent;

class Post extends Eloquent
{
    protected $appends = [
        'thumbnail',
    ];
    
    // Will raise "Undefined index:" exception without below hidden original attribute.
    protected $hidden = [
        'thumbnail',
    ];
    
    pubilc function getThumbnailAttribute()
    {
        return $this->attributes['thumbnail'];
    }
}