rails_issue_33429.rb

# frozen_string_literal: true

begin
  require "bundler/inline"
rescue LoadError => e
  $stderr.puts "Bundler version 1.10 or later is required. Please update your Bundler"
  raise e
end

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

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

  # Activate the gem you are reporting the issue against.
  gem "activerecord", "~> 6.0.1"
  gem "sqlite3", "~> 1.4.1"
end

require "active_record"
require "minitest/autorun"
require "logger"

# Ensure backward compatibility with Minitest 4
Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test)

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :projects, force: true do |t|
    t.timestamps null: false
  end
  create_table :documents, force: true do |t|
    t.belongs_to :project, null: false
    t.timestamps null: false
  end
end

class Project < ActiveRecord::Base
  has_many :documents

  after_touch :my_after_touch_callback

  def my_after_touch_callback
    $timestamp = updated_at_before_last_save
  end
end

class Document < ActiveRecord::Base
  belongs_to :project, touch: true
end

class BugTest < Minitest::Test
  def test_1
    p = Project.create
    $timestamp = nil
    p.touch
    assert_kind_of Time, $timestamp # passes
  end

  def test_2
    p = Project.create
    d = Document.create(project: p)
    $timestamp = nil
    d.touch
    assert_kind_of Time, $timestamp # fails
  end
end