# assume we have a :data attribute (an hstore hash) in our model   that values have html
#  data       :hstore           default({}), not null

validate :invalid_html?

  def invalid_html?
    self.data.each do |key, value|
      doc = Nokogiri::HTML(value) {|config| config.strict }
      if doc.errors.any?
        errors.add(:base, "#{key}: #{doc.errors.join(", ")}")
      end
    end
  end


# The problem is that  Nokogiri its NOT very :strict
#2.1.3 :001 > Nokogiri::HTML("<a/><a/><a/>") {|config| config.strict }.errors.any?
# => false
2.1.3 :002 >