Active Repository

Welcome !! This gem aim is to add repository patter over rails activerecord implementation. Our objectives are not create a replacement for rails ORM activerecord

You might ask why ?

Well! Lately working on a large projet with a large code base. And we finally ended with enormous models where we have associations, validations and queries than break the Single Responsibility Principle (SRP) . And then comes to mind why not put queries in seperate class ? How would we call thoses classes : Where comes to mind the Repository Pattern.

From his book Martin Fowler defines a repository as a class that: Mediates between the domain and data mapping layers using a collection-like interface for accessing domain objects Repository M. Fowler. That means repositories encapsulates logic to have access data in his responsibility.

We define a repository as data access class from aggregated nodes or models.

In this, each repository has a cluster of rails models called nodes (Nodes are nothing else than Models).

Installation

Add this line to your application's Gemfile:

gem 'active_repository', :git => 'git://github.com/katakeynii/activerepository.git'

And then execute:

$ bundle

Usage

You can generate repositories with commands below :

  rails g repository post

  rails g repository blog user:blog/user post:blog/post --aggregate

But still you can create a directory app/repositories and put it all your futur repositories. Here we are going to create two repositories a Group Repository and a Blog Repository. A repository inherit from the ActiveRepository::Base class

# app/repositories/post_repository.rb 
class Blog::PostRepository < ActiveRepository::Base
    model :post,   "Blog::Post"
    
end
# app/repositories/blog_repository.rb 
class BlogRepository < ActiveRepository::Base
    model :user, "Blog::User"
    model :post,   "Blog::Post"
    
    # define class that fetch last node
    def last_post
        self.class.nodes.post
    end
end

# app/repositories/comment_repository.rb 
class Blog::CommentRepository < ActiveRepository::Base
    model :post,   "Blog::Comment"
    
end

From Controller or Services

#  find first article
 BlogRepository.nodes.post.find(1)

 #find published articles
 BlogRepository.nodes.post.where(published: true)

 #Create a user
 BlogRepository.nodes.user.create! firstname: "John", name: "Doe"

TODOS

• Aggregate root implementation
• Query Builder based on Arel
• PL/SQL function caller

Development

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.

Contributing

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

Code of Conduct

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