class VolumeValidator < ActiveModel::EachValidator
  def validate_each(record, attribute, value)
    value[:volumes_attributes].each do |_, attrs|
      if attrs["capacity"].to_s.empty? || /\A\d+G?\Z/.match(attrs["capacity"].to_s).nil?
        record.errors.add(attribute, _("Volume size #{attrs["capacity"]} is not valid"))
      end
    end
  end
end