Touch not working on destroy

test_case.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 "arel", github: "rails/arel"
  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 :sites, force: true do |t|
    t.datetime :updated_at, null: false
    t.datetime :created_at, null: false
  end

  create_table :site_publications, force: true do |t|
    t.integer :site_id
    t.integer :guide_id
    t.datetime :updated_at, null: false
    t.datetime :created_at, null: false
  end

  create_table :guides, force: true do |t|
    t.datetime :updated_at, null: false
    t.datetime :created_at, null: false
  end
end

class Site < ActiveRecord::Base
  has_many :site_publications
  has_many :guides, through: :site_publications
end

class SitePublication < ActiveRecord::Base
  belongs_to :site, touch: true
  belongs_to :guide
end

class Guide < ActiveRecord::Base
  has_many :site_publications
  has_many :sites, through: :site_publications
end


class BugTest < Minitest::Test
  def test_touch_callbacks
    site = Site.create!
    Guide.create!
    Guide.create!
    site_updated_at = site.updated_at
    site.guide_ids = [1, 2]

    assert site_updated_at < site.reload.updated_at, "Site#updated_at should have been updated when publication was created"

    site_updated_at = site.reload.updated_at
    site.guide_ids = [1]

    assert site_updated_at < site.reload.updated_at, "Site#updated_at should have been updated when publication was destroyed"
  end
end