Arrangeable

Arrangeable provides an organized and seamless way to sort your ActiveRecord objects by different attributes.

Add this line to your application's Gemfile:

gem 'arrangeable', '~> 0.1.5'

And then execute:

$ bundle

Or install it yourself as:

$ gem install arrangeable

Include Arrangeable inside ApplicationRecord or directly inside your ActiveRecord model and override the arrangeable_fields method for each model to whitelist the fields you want to use for sorting:

class User < ApplicationRecord
  include Arrangeable

  concerning :Arranging do
    class_methods do
      def arrangeable_fields
        %w[id first_name last_name]
      end
    end
  end
end

Failing to override arrangeable_fields will raise a NotImplementedError.

Now sort your objects by calling arrange on your model and passing a comma-separated order string. Prepend a negative sign - before a key to order by that key descendingly:

@users = User.all

order_string = 'first_name,-id'
@users = @users.arrange(order_string)

The previous example will generate the following SQL order clause: ORDER BY first_name ASC, id DESC.

Note that id can always be used for sorting regardless of whether you whitelist it or not. Any non whitelisted sorting keys will be ignored.

Bug reports and pull requests are welcome on GitHub at https://github.com/umar221b/arrangeable.

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