def update(attrs, safe = false)
      self.attributes = attrs
      if new_record?
        _root.send(:_save, safe) if _root
        _save(safe)
      else
        _update_attributes(converted_attributes(attrs), safe)
      end
    end
def update(attrs, safe = false)
      self.attributes = attrs
      if new_record?
        _root.send(:_save, safe) if _root
        _save(safe)
      else
        _update_attributes(converted_attributes(attrs), safe)
      end
    end
Update without checking validations. The +Document+ will be saved without validations if it is a new record.