I've been implementing an Active Storage Google strategy on Rails 5.2, at the moment I am able to upload files using the rails console without problems, the only thing I am missing is if there is a way to specify a directory inside a bucket. Right now I am uploading as follows

```
bk.file.attach(io: File.open(bk.source_dir.to_s), filename: "file.tar.gz", content_type: "application/x-tar")

```

The configuration on my storage.yml

```
google:
  service: GCS
  project: my-project 
  credentials: <%= Rails.root.join("config/myfile.json") %>
  bucket: bucketname

```

But in my bucket there are different directories such as bucketname/department1 and such. I been through the documentation and have not found a way to specify further directories and all my uploads end up in bucket name.