activerecord5_issue.rb

activerecord5_issue.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', '5.0.0'
  gem 'sqlite3'
end

require 'active_record'
require 'minitest/autorun'
require 'logger'

# 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 :articles, force: true  do |t|
  end

  create_table :followers, force: true  do |t|
    t.integer :article_id
    t.integer :user_id
  end

  create_table :users, force: true  do |t|
    t.string :name
  end
end

class Article < ActiveRecord::Base
  has_many :followers
  has_many :users, through: :followers
end

class Follower < ActiveRecord::Base
  belongs_to :article
  belongs_to :user
end

class User < ActiveRecord::Base
  before_update :say_hello

  def say_hello
    self.name = 'Hello'
  end
end

class BugTest < Minitest::Test
  def test_before_save_callback
    user = User.create!(name: 'Mario')
    order = Article.create!(user_ids: [user.id])
    user.reload
    assert_equal 'Mario', user.name
  end
end