Filterable

Adds filter functionality to your ActiveRecord models

Add this line to your application's Gemfile:

gem 'filterable'

And then execute:

$ bundle

Include Filterable concern to the model you want to act as filterable:

class Posts
  include Filterable
end

Add scopes for each field that you want to filter by:

class Posts
  # ...
  scope :name, -> (name) { where(name: name) }
  scope :author, -> (author) { where(author: author) }
  # ...
end

Now you can use it in you controller like that:

class PostsController
  def index
    @posts = Post.filter(
      params.slice(:name, :author)
    )
  end
end

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.

Bug reports and pull requests are welcome on GitHub at https://github.com/ImmaculatePine/filterable. 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.

I found this article by Justin Weiss useful and decided to move it to a gem.

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