Sanitize class macro

sanitize_helper.rb

class ActiveRecord::Base
  def self.sanitize_attribute(*attr_names)
    attr_names.each do |attr_name|
      define_method attr_name do
        self[attr_name].try(:html_safe)
      end
      define_method "#{attr_name}=" do |attr_value|
        self[attr_name] = attr_value.try(:sanitize)
      end
    end
  end
end

string_ext.rb

class String
  def sanitize()
    Sanitize.clean(self, Sanitize::Config::RELAXED).strip.html_safe
  end
end