ar_multiple_column.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" }

  #gem "rails", github: "rails/rails"
  gem "activerecord", "5.2.0.rc2"
  gem "pg"
end

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

# Need to do this to create a new DB in postgresql.
ActiveRecord::Base.establish_connection(adapter: "postgresql", database: "postgres")
ActiveRecord::Base.connection.execute("DROP DATABASE IF EXISTS test_test")
ActiveRecord::Base.connection.execute("CREATE DATABASE test_test")
ActiveRecord::Base.establish_connection(adapter: "postgresql", database: "test_test")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :posts, force: true do |t|
    t.timestamps
  end

  create_table :comments, force: true do |t|
    t.integer :post_id
  end
end

class Post < ActiveRecord::Base
  has_many :comments
end

class Comment < ActiveRecord::Base
  belongs_to :post, touch: :updated_at
end

class BugTest < Minitest::Test
  def test_post_touch
    post = Post.create!
    post.touch(:updated_at)
  end
  
  def test_association_stuff
    post = Post.create!
    post.comments << Comment.create!

    assert_equal 1, post.comments.count
    assert_equal 1, Comment.count
    assert_equal post.id, Comment.first.post.id
  end
end