When you execute save on a model in Active Record, the saves of related models with pre-set hooks are also executed. SaveChainInspector provides a way to know which models and which hooks have been executed specifically.

Install the gem and add to the application's Gemfile by executing:

$ bundle add save_chain_inspector --group=development,test

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install save_chain_inspector

SaveChainInspector.start takes a block. It outputs the execution order of the save chain to the standard output.

SaveChainInspector.start do
  post = Post.new
  post.comments.build
  post.save
end

Post#save start
  Post#before_save start
  Post#before_save end
  Post#after_create start
    Post#autosave_associated_records_for_comments start
      Comment#save start
        Comment#before_save start
          Comment#autosave_associated_records_for_post start
          Comment#autosave_associated_records_for_post end
        Comment#before_save end
        Comment#after_create start
        Comment#after_create end
      Comment#save end
    Post#autosave_associated_records_for_comments end
  Post#after_create end
Post#save end

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/willnet/save_chain_inspector. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

The gem is available as open source under the terms of the MIT License.

Everyone interacting in the SaveChainInspector project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.