EntityComponents

This is a simple system for having entities with data components in Rails. Store component data in a single table/collection and define components in a separate directory.

Add this line to your application's Gemfile:

gem 'entity_components'

And then execute:

$ bundle

Make a model that has components text field and a values text field. Include EntityComponents into it like so:

class Entity < ApplicationRecord
  include EntityComponents
end

Then define components in app/components with a constructor that takes a hash of properties like so:

class Position < OpenStruct
end

Now you can create a new entity like so:

2.3.0 :001 > e = Entity.new(id: 'a', components: ['position'], values: { position: { x: 0, y: 5 } })
 => #<Entity id: nil, components: ["position"], values: {:position=>{:x=>0, :y=>5}}, created_at: nil, updated_at: nil>
2.3.0 :002 > e.position.y
 => 5

After checking out the repo, run bin/setup to install dependencies. Then, run rake test 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.

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/entity_components. 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.

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