validates-correios-cep

Add this line to your application's Gemfile:

gem 'validates-correios-cep'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install validates-correios-cep

class Person < ActiveRecord::Base
  validates :my_attribute, correios_cep: true

  # or

  validates_correios_cep_of :my_attribute
end

class Person
  include ActiveModel::Model

  validates :my_attribute, correios_cep: true

  # or

  validates_correios_cep_of :my_attribute
end

To customize your error messages you can create a locale file like this:

en:
  correios_cep:
    errors:
      messages:
        not_exists: '%{zipcode} is not a existent Brazilian zipcode'
        connection_failed: 'failure on connection with Brazilian Correios API'
        invalid: '%{zipcode} is not a valid Brazilian zipcode'
        timeouted: 'timeout with Brazilian Correios API'

The %{zipcode} contains the zipcode value, filled by user.

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