Pluck UUID Bug

pluck-uuid-bug.rb

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"
  gem "rails", github: "rails/rails"
  gem "arel", github: "rails/arel"
  gem "pg"
end

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

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(
  adapter: "postgresql",
  database: "testing",
  username: "permitzone",
  password: "permitzone",
  host: '127.0.0.1'
)
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  enable_extension 'pgcrypto'

  create_table :posts, force: true do |t|
  end

  create_table :comments, id: :uuid, 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
end

class BugTest < Minitest::Test
  def test_association_stuff
    post = Post.create!
    post.comments << Comment.create!

    ids = Post.joins(:comments).pluck('posts.id', 'comments.id')
    assert_equal post.id, ids[0][0]
    assert_equal post.comments.first.id, ids[0][1]
  end
end