def self.write_one(object, writer, singular = nil)
singular ||= 'katello_erratum'
writer.write_start(singular)
href = object.href
writer.write_attribute('href', href) unless href.nil?
writer.write_attribute('id', object.id) unless object.id.nil?
Writer.write_string(writer, 'comment', object.comment) unless object.comment.nil?
Writer.write_string(writer, 'description', object.description) unless object.description.nil?
Writer.write_date(writer, 'issued', object.issued) unless object.issued.nil?
Writer.write_string(writer, 'name', object.name) unless object.name.nil?
PackageWriter.write_many(object.packages, writer, 'package', 'packages') unless object.packages.nil?
Writer.write_string(writer, 'severity', object.severity) unless object.severity.nil?
Writer.write_string(writer, 'solution', object.solution) unless object.solution.nil?
Writer.write_string(writer, 'summary', object.summary) unless object.summary.nil?
Writer.write_string(writer, 'title', object.title) unless object.title.nil?
Writer.write_string(writer, 'type', object.type) unless object.type.nil?
HostWriter.write_one(object.host, writer, 'host') unless object.host.nil?
VmWriter.write_one(object.vm, writer, 'vm') unless object.vm.nil?
writer.write_end
end