Active Similar

Ruby gem to find similar Active Record models through most common associations.

Add this line to your application's Gemfile:

gem 'active_similar'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install active_similar

require 'active_similar'

class Post < ActiveRecord::Base
  include ActiveSimilar

  has_many :categories
  has_many :tags

  scope :published, -> { where status: 'published' }
  scope :featured,  -> { where featured: true }

  has_similar :related, through: %i[categories tags], scope: :published
end

post = Post.find(1)
post.related # Returns similar posts to post #1

similar = ActiveSimilar::Query.new(Post.published, through: %i[categories tags])
similar.with(2) # Returns similar posts to post #2

similar = ActiveSimilar::Query.new(Post.featured, through: %i[categories])
similar.with(3) # Returns similar posts to post #3

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/hardpixel/active-similar.

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