Service objects for Rails, the Rails way. This Ruby gem adds service objects to your Rails applications.

1 - Add the gem to your Rails application's Gemfile:

bundle add rails_application_service

2 - Install the gem by running:

bundle install

3 - Create an app/services directory in your Rails application:

mkdir -p app/services

The ApplicationService::Base class provides a standard interface for calling service objects with robust type handling and validations. It leverages ActiveModel::API for initialization with keyword arguments, ActiveModel::Attributes for type casting, and ActiveModel::Validations for input validation.

require "application_service"

class MyService < ApplicationService::Base
  def call
    # Perform the service action
  end
end

my_service = MyService.call # nil

require "application_service"

class Sum < ApplicationService::Base
  attribute :number_a, :integer
  attribute :number_b, :integer

  validates :number_a, :number_b, presence: true, numericality: { greater_than: 0 }

  def call
    number_a + number_b
  end
end

sum = Sum.call(number_a: 1, number_b: 2) # => 3

This gem supports the following attribute types through ActiveModel::Attributes and custom types defined in ActiveModel::Type:

• :boolean
• :date
• :datetime
• :decimal
• :float
• :integer
• :string
• :time

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to execute the tests. You can also run bin/console for an interactive prompt 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, then run bundle exec rake release. This will create a git tag for the version, push git commits and the tag, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/mariomarroquim/rails_application_service. 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 ApplicationService project's codebases, issue trackers, chat rooms, and mailing lists is expected to follow the code of conduct.

You can contact me at [email protected].