active_storage_attach_in_transaction.rb

# frozen_string_literal: true

# from https://github.com/rails/rails/blob/v7.1.3.2/guides/bug_report_templates/active_storage.rb

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  gem "rails"
  gem "sqlite3", '~> 1.4'
end

require "active_record/railtie"
require "active_storage/engine"
require "tmpdir"

class TestApp < Rails::Application
  config.root = __dir__
  config.logger = Logger.new($stdout)
  config.eager_load = false
  Rails.logger  = config.logger

  config.active_storage.service = :local
  config.active_storage.service_configurations = {
    local: { root: Dir.tmpdir, service: "Disk" }
  }
end

ENV["DATABASE_URL"] = "sqlite3::memory:"

Rails.application.initialize!

require ActiveStorage::Engine.root.join("db/migrate/20170806125915_create_active_storage_tables.rb").to_s

ActiveRecord::Schema.define do
  CreateActiveStorageTables.new.change

  create_table :users, force: true
end

class User < ActiveRecord::Base
  has_one_attached :profile
end

user = User.create!

ActiveRecord::Base.transaction do
  user.profile.attach(
    content_type: 'text/plain',
    filename: 'dummy.txt',
    io: ::StringIO.new('dummy'),
  )

  user.profile.download # => raise ActiveStorage::FileNotFoundError
end

user.profile.download # => "dummy"