lib/email_validator.rb


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# Based on https://github.com/balexand/email_validator
#
# Extended to use only strict mode with following allowed characters:
# ' - apostrophe
#
# See http://www.remote.org/jochen/mail/info/chars.html
#
class EmailValidator < ActiveModel::EachValidator
  @@default_options = {}

  def self.default_options
    @@default_options
  end

  def validate_each(record, attribute, value)
    options = @@default_options.merge(self.options)
    unless value =~ /\A\s*([-a-z0-9+._']{1,64})@((?:[-a-z0-9]+\.)+[a-z]{2,})\s*\z/i
      record.errors.add(attribute, options[:message] || :invalid)
    end
  end
end