• CNS (Cartão Nacional de Saúde) - CNS is a national health card
• Is a validator and generator based in algorithm from https://integracao.esusab.ufsc.br/v211/docs/algoritmo_CNS.html

Add this line to your application's Gemfile:

gem 'cns_brazil'

And then execute:

$ bundle

Or install it yourself as:

$ gem install cns_brazil

• Just use as any other validator:

class User < ActiveRecord::Base
  validates :cns, '::CnsBrazil::Cns': true
end

• Use with anny column name

class User < ActiveRecord::Base
  validates :my_cns, '::CnsBrazil::Cns': true
end

• Allow blank value

class User < ActiveRecord::Base
  validates :cns, '::CnsBrazil::Cns': true, allow_blank: true
end

require "cns_brazil"

cns_validator = CnsBrazil::Cns.new(value: '1234567891234516')

cns_validator.valid? # true || false

require "cns_brazil"

CnsBrazil::Cns.generate  # returns a valid CNS

Obs: If your project has shoulda-matchers gem you can use next matcher

Create a file spec/support/cns_brazil.rb and add next content

require 'cns_brazil/validate_cns_matcher'

Use in your tests:

specify { is_expected.to validate_cns } # It will test the attribute :cns by default
specify { is_expected.to validate_cns(:my_cns) }

With blank value

specify { is_expected.to validate_cns.allow_blank }
specify { is_expected.to validate_cns(:my_cns).allow_blank }

• Project Example LINK

• Run using Docker: docker-compose run web bash
• In bash Run: bundle install
• Run spec: spec

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request