Method format

logger/formatter_json.go:47–104

format formats a log record.

(r slog.Record)

// format formats a log record.
func (s *formatterJSON) format(r slog.Record) {
	// Open the JSON object and defer closing it.
	s.buf.append(jsonGroupOpenToken)
	defer func() {
		s.buf.append(jsonGroupCloseToken)
	}()

	// Append timestamp
	s.appendKey(slog.TimeKey)
	s.appendTime(r.Time)

	// Append log level
	s.appendKey(s.levelKey)
	s.appendString(s.levelName(r.Level))

	// Append message
	s.appendKey(s.messageKey)
	s.appendString(r.Message)

	// Append groups added with [Handler.WithAttrs] and [Handler.WithGroup]
	for _, g := range s.groups {
		if g.name != "" {
			s.openGroup(g.name)
		}

		s.appendAttributes(g.attrs)
	}

	// Append attributes from the record
	r.Attrs(func(attr slog.Attr) bool {
		s.appendAttribute(attr)
		return true
	})

	// Close all opened groups.
	for s.groupsOpened > 0 {
		s.closeGroup()
	}

	// Append error, source, and stack if present
	if s.error.Key != "" {
		s.appendKey(s.error.Key)
		s.appendValue(s.error.Value)

		if docsURL := s.errorDocsURL(); docsURL != nil {
			s.appendKey(docsURL.Key)
			s.appendValue(docsURL.Value)
		}
	}
	if s.source.Key != "" {
		s.appendKey(s.source.Key)
		s.appendValue(s.source.Value)
	}
	if s.stack.Key != "" {
		s.appendKey(s.stack.Key)
		s.appendValue(s.stack.Value)
	}
}