Rails 7, ActiveStorage and Spaces.

I am hitting a Aws::S3::Errors::NoSuchBucket. error when attempting to upload a file via a Rails 7.0.1 app with ruby 3.1 installed.

This is unexpected given the rails documentation and indications given here in a community tutorial https://www.digitalocean.com/community/tutorials/how-to-use-activestorage-in-rails-6-with-digitalocean-spaces

Gemfile:

gem "image_processing", "~> 1.2"
gem 'aws-sdk-s3', '~> 1.111', '>= 1.111.1'

development.rb

#  config.active_storage.service = :local
  config.active_storage.service = :digitalocean

storage.yml

test:
  service: Disk
  root: <%= Rails.root.join("tmp/storage") %>

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

digitalocean:
  service: S3
  endpoint: https://fra1.digitaloceanspaces.com
  access_key_id: <%= Rails.application.credentials.dig(:digitalocean, :access_key) %>
  secret_access_key: <%= Rails.application.credentials.dig(:digitalocean, :secret) %>
  bucket: static-images-reflektor.fra1.digitaloceanspaces.com
  region: unused

I’ve seen very old discussions about buckets on European S3 infrastruture which do not pan out - or require a 1 character change in the namespace, but that seems both dated and flaky.

The error occurs as the S3 SDK is being invoked and logged as

  TRANSACTION (6.0ms)  COMMIT
  ↳ app/controllers/articles_controller.rb:27:in `block in create'
  S3 Storage (241.5ms) Uploaded file to key: [obfuscate] (checksum: [obfuscate])
Completed 500 Internal Server Error in 355ms (ActiveRecord: 15.4ms | Allocations: 62307)



Aws::S3::Errors::NoSuchBucket (Aws::S3::Errors::NoSuchBucket):

What is wrong with the above?