Activerecord::WrappedTransaction

Wrap transactions in an object-oriented way so that you can tell if an individual transaction succeeded, rolled back, or was cancelled.

Supported versions and databases:

• Rails 5 and 6
• MySQL, PostgreSQL, and SQLite
• Ruby 2.4, 2.5, 2.6, 2.7

Installation

Add this line to your application's Gemfile:

gem "activerecord-wrapped_transaction", "~> 0.9"

And then execute:

$ bundle

Or install it yourself as:

$ gem install activerecord-wrapped_transaction -v "~> 0.9"

Usage

Contrived example:

ActiveRecord::Base.include ActiveRecord::WrappedTransaction

wrapped_result = ActiveRecord::Base.wrapped_transaction do |context|
  user = User.create! attributes 

  failable_result = OptionalThing.wrapped_transaction requires_new: true do
    # This can fail, but we'll let it
    OptionalThing.create! user: user, foo: "bar"
  end

  failable_result.rolled_back? # => true

  # There is also a shorthand that uses the optional context helper
  # This creates a new transaction layer that has requires_new: true
  # set implicitly.
  other_failable = context.maybe do
	Something.explodes!
  end

  other_failable.rolled_back? # => true

  cancelled = context.maybe do |inner_context|
	inner_context.cancel! "arbitrarily"
  end

  cancelled.cancelled? # => true
  cancelled.rolled_back? # => true
  cancelled.cancellation_reason # => "arbitrarily"

  # return our result
  user
end

wrapped_result.result # => user
wrapped_result.success? # => true
wrapped_result.rolled_back? # => false

You can pass the same options you would to ActiveRecord::Base.transaction: requires_new, isolation, joinable

Development

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 tags, and push the .gem file to rubygems.org.

Contributing

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

License

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