Error occurs when selecting columns with select and saving

[wonda-tea-coffee]

Abstract

When saving against the model retrieved by select, an error occurs and the image is updated to nil.

Step to reproduce

code

# frozen_string_literal: true

require "bundler/inline"

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

  git_source(:github) { |repo| "https://github.com/#{repo}.git" }

  gem "activerecord"
  gem "sqlite3"
  gem "carrierwave"
  gem "rmagick"
end

require "active_record"
require "minitest/autorun"
require "logger"
require 'carrierwave/orm/activerecord'

ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :users, force: true do |t|
    t.string :avatar
  end
end

class ImageUploader < CarrierWave::Uploader::Base
  include CarrierWave::RMagick
end

class User < ActiveRecord::Base
  mount_uploader :avatar, ImageUploader
end

class BugTest < Minitest::Test
  def test_save_without_select
    User.create!
    assert User.last.save # test is pass
  end

  def test_save_with_select
    User.create!
    assert User.select(:id).last.save # error occurs!
  end
end

output

Finished in 0.010423s, 191.8821 runs/s, 95.9411 assertions/s.

  1) Error:
BugTest#test_save_with_select:
NoMethodError: undefined method `remove_previously_stored_files_after_update' for #<Object:0x00007f2757986d88>

        uploader.remove! if uploader.remove_previously_stored_files_after_update && !after_paths.include?(uploader.path)
                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    /usr/local/bundle/gems/carrierwave-2.2.2/lib/carrierwave/mounter.rb:157:in `block in remove_previous'
    /usr/local/bundle/gems/carrierwave-2.2.2/lib/carrierwave/mounter.rb:156:in `each'
    /usr/local/bundle/gems/carrierwave-2.2.2/lib/carrierwave/mounter.rb:156:in `remove_previous'
    /usr/local/bundle/gems/carrierwave-2.2.2/lib/carrierwave/mount.rb:204:in `remove_previously_stored_profile_image_filename'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/callbacks.rb:400:in `block in make_lambda'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/callbacks.rb:261:in `block in conditional'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/callbacks.rb:599:in `block in invoke_after'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/callbacks.rb:599:in `each'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/callbacks.rb:599:in `invoke_after'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/callbacks.rb:108:in `run_callbacks'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/callbacks.rb:929:in `_run_commit_callbacks'
    /usr/local/bundle/gems/activerecord-7.0.3/lib/active_record/transactions.rb:321:in `committed!'
    /usr/local/bundle/gems/activerecord-7.0.3/lib/active_record/connection_adapters/abstract/transaction.rb:155:in `commit_records'
    /usr/local/bundle/gems/activerecord-7.0.3/lib/active_record/connection_adapters/abstract/transaction.rb:304:in `block in commit_transaction'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `handle_interrupt'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `block in synchronize'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `handle_interrupt'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `synchronize'
    /usr/local/bundle/gems/activerecord-7.0.3/lib/active_record/connection_adapters/abstract/transaction.rb:294:in `commit_transaction'
    /usr/local/bundle/gems/activerecord-7.0.3/lib/active_record/connection_adapters/abstract/transaction.rb:345:in `block in within_new_transaction'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `handle_interrupt'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `block in synchronize'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `handle_interrupt'
    /usr/local/bundle/gems/activesupport-7.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `synchronize'
    /usr/local/bundle/gems/activerecord-7.0.3/lib/active_record/connection_adapters/abstract/transaction.rb:317:in `within_new_transaction'
    /usr/local/bundle/gems/activerecord-7.0.3/lib/active_record/connection_adapters/abstract/database_statements.rb:316:in `transaction'
    /usr/local/bundle/gems/activerecord-7.0.3/lib/active_record/transactions.rb:350:in `with_transaction_returning_status'
    /usr/local/bundle/gems/activerecord-7.0.3/lib/active_record/transactions.rb:298:in `save'
    /usr/local/bundle/gems/activerecord-7.0.3/lib/active_record/suppressor.rb:50:in `save'
    test.rb:48:in `test_save_with_select'

2 runs, 1 assertions, 0 failures, 1 errors, 0 skips

Question

I would like the test test_save_with_select to go through, is this the intended behavior?

For reference, this behavior was caused by the following commit.
67800fd