Set ActiveStorage disk service upload paths

Question

Does anyone know how to change the disk_service.rb to specify upload paths, for example:

my_path = Rails.root.join("public", "websites", "example.com", "users", current_user.id, "avatar")
current_user.avatar.attach(file, my_path)

This would result in having the file uploaded here:

/public/websites/example.com/users/12345/avatar/blah.png

And then I'd be able to:

rails_representation_path( current_user.avatar.variant(resize: "100x100"), disposition: 'attachment')

and get back the path:

/websites/example.com/users/12345/avatar/blah-100x100.png

This will allow getting rid of many issues around the ActiveStorage public/private URLs and related to CDN caching.

I am playing with https://github.com/rails/rails/blob/master/activestorage/lib/active_storage/service/disk_service.rb but can't figure out much of what it does and how it works really.

I spent a long time trying to make active storage work, but I kept bumping into limitations for frustratingly simple use-cases that aren't supported and cannot be easily implemented, so I ended up going with Shrine which is HEAVEN for anything files related. If you are not too deep into the project, go with Shrine. — Tashows
It seems we're not the only ones running into trouble with ActiveStorage. Fortunately I haven't gone too far with it and will likely switch very soon. — Nick M

thisischuck thisischuck · Accepted Answer · 2019-09-01T15:07:14

In your config/storage.yml you should have a configuration block for the local storage service, you can change where the attachments are stored by specifing a different path for root.

local:
  service: Disk
  root: <%= Rails.root.join('storage') %>

I don't think that you'll be able to address the specific images in the manner you are describing. ActiveRecord creates a unique key for everything that is attached to a model and renames the files with that key.

Set ActiveStorage disk service upload paths

1 Answers