Unransackable attributes for multiple models

Question

To exclude some attributes from search and sorting I add following to my model

UNRANSACKABLE_ATTRIBUTES = %w[id created_at updated_at section] 

def self.ransackable_attributes auth_object = nil
    (column_names - UNRANSACKABLE_ATTRIBUTES) + _ransackers.keys
end

Two of my models use this, so what is the way to keep my code DRY and write this method once?

Answer 1

This can be done next way:

1) uncomment config.autoload_paths += %W(#{config.root}/extras) in 'config/application.rb' and change 'extras' to 'lib'

2) in 'lib' directory create 'ransackable_attributes.rb':

module RansackableAttributes
    extend ActiveSupport::Concern

    included do
        def self.ransackable_attributes auth_object = nil
            (column_names - self::UNRANSACKABLE_ATTRIBUTES) + _ransackers.keys
        end
    end

end

3) Add 'include' to models

class Ad < ActiveRecord::Base
    include RansackableAttributes

class Category < ActiveRecord::Base
    include RansackableAttributes