syck-schema-cache.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" }

  # Activate the gem you are reporting the issue against.
  gem "activerecord", "5.1.0"
  gem "sqlite3"
  gem "syck"
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 :posts, force: true do |t|
  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
end

# Monkey patch to fix the problem
# ActiveRecord::ConnectionAdapters::SchemaCache.class_eval do
#   def to_yaml(*)
#     @version = ActiveRecord::Migrator.current_version
#     super
#   end
#
#   def to_yaml_properties
#     (super - [:@connection]).sort
#   end
# end

class BugTest < Minitest::Test
  def test_cached_schema_cant_be_parsed
    ActiveRecord::Tasks::DatabaseTasks.dump_schema_cache(ActiveRecord::Base.connection, "syck-schema-cache.yml")

    assert_equal ActiveRecord::ConnectionAdapters::SchemaCache, YAML.load(File.read("syck-schema-cache.yml")).class
  end
end