Rails ActiveRecord join table withour id delete issue

25347_join_table.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"
  # Activate the gem you are reporting the issue against.
  gem "activerecord", "5.1.0.rc1"
  gem "sqlite3"
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 :events, force: true do |t|
    t.string :name
  end

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

  create_table :events_users, id: false, force: true do |t|
    t.integer :event_id
    t.integer :user_id
    t.integer :status, default: 0
  end
end

class Event < ActiveRecord::Base
  has_many :events_users, foreign_key: :event_id, dependent: :destroy
  has_many :users, through: :events_users
end

class User < ActiveRecord::Base
  has_many :user_events, foreign_key: :user_id, dependent: :destroy
  has_many :events, through: :user_events
end

class EventsUser < ActiveRecord::Base
  belongs_to :event
  belongs_to :user
end

User.create(first_name: "Almaz", last_name: "Ayana")
Event.create(name: "Christmas")

EventsUser.create(user_id: 1, event_id: 1)

class BugTest < Minitest::Test
  def test_join_table_update
    event = Event.first
    event.destroy
    assert_nil EventsUser.first
  end
end