Generate s3 bucket key from DB records

[single-stop-rj]

Hello. I am looking for a way to generate the s3 key strictly from the DB record.

Is this possible?

In my config file, I have

...
path: ":class/:attachment/:id_partition/:hash/:style/:filename",
...

I am building an ETL process, and I would like to scope it to just running off the data in the DB, and not have to run a process on the old server.

The example DB record is.

1,a,Note,some_filename.pdf,application/pdf,55945(some file size),some_file_name.pdf, 1,Owner::User,created_at_time, updated_at_time

and the S3 path is something like

attachments/files/000/000/011/14574b3c24afc433440aa46ab42be4044e4dd492/original/some_file.pdf

How would I be able to generate the proper key with only the database record?