Thumbnails not displaying in grid view when using S3-compatible storage (Hetzner Object Storage)

[cloudhivedc]

Hi,
Thumbnails are not displaying in the File Manager grid view when using S3-compatible storage (Hetzner Object Storage).
Environment:

Laravel 12.54.1
Filament 5.3.5
PHP 8.4
mwguerra/filemanager ^2.0
Storage: Hetzner Object Storage (S3-compatible, hel1.your-objectstorage.com)
FILEMANAGER_URL_STRATEGY=auto (also tried direct and signed_route — same result)

What happens:
Files are uploaded successfully to S3, accessible via direct URL, but thumbnails show only a placeholder icon in grid view. No errors in browser console or Laravel logs.
What I expect:
Image thumbnails should be visible in the grid view, similar to how they appear when using local storage.
Notes:

Files are publicly accessible via direct S3 URL
Storage::url() returns correct URLs
temporaryUrl() also works correctly

[cloudhivedc]

Solved.

Solution:

For existing files — run SQL to populate thumbnails:

sqlUPDATE file_system_items
SET thumbnail = CONCAT('https://your-bucket.region.your-objectstorage.com/', storage_path)
WHERE type='file' AND file_type='image';

For new uploads — create an Observer to auto-populate thumbnail on create/update:

php// app/Observers/FileSystemItemObserver.php
class FileSystemItemObserver
{
public function created(FileSystemItem $item): void
{
$this->setThumbnail($item);
}

public function updated(FileSystemItem $item): void
{
    $this->setThumbnail($item);
}

private function setThumbnail(FileSystemItem $item): void
{
    if ($item->type === 'file' && $item->file_type === 'image' && empty($item->thumbnail)) {
        $item->updateQuietly([
            'thumbnail' => 'https://your-bucket.region.your-objectstorage.com/' . $item->storage_path,
        ]);
    }
}

}
Register in AppServiceProvider::boot():
php\MWGuerra\FileManager\Models\FileSystemItem::observe(\App\Observers\FileSystemItemObserver::class);
Suggestion for the package:
It would be great if the package automatically populated the thumbnail field on file creation, especially for S3 disks where public URLs are available. This would make the package work out of the box with S3-compatible storage providers.
Environment:

Laravel 12.54.1
Filament 5.3.5
PHP 8.4
mwguerra/filemanager ^2.0
Hetzner Object Storage (S3-compatible)