Method Handle

slog.go:40–73

Handle handles the Record. It converts the slog.Record into a zerolog event and writes it using the underlying zerolog.Logger.

(ctx context.Context, record slog.Record)

// Handle handles the Record. It converts the slog.Record into a zerolog event
// and writes it using the underlying zerolog.Logger.
func (h *SlogHandler) Handle(ctx context.Context, record slog.Record) error {
	zlevel := slogToZerologLevel(record.Level)
	event := h.logger.WithLevel(zlevel)
	if event == nil {
		return nil
	}

	// Propagate slog context to the zerolog event so that hooks
	// relying on Event.GetCtx() (e.g. tracing) can access it.
	if ctx != nil {
		event = event.Ctx(ctx)
	}

	// Add pre-attached attrs from WithAttrs
	for _, a := range h.attrs {
		event = appendSlogAttr(event, a, h.prefix)
	}

	// Add attrs from the record itself
	record.Attrs(func(a slog.Attr) bool {
		event = appendSlogAttr(event, a, h.prefix)
		return true
	})

	// Add timestamp from the slog record, but only if the logger doesn't
	// already have a timestampHook (added via .With().Timestamp()) to
	// avoid duplicate timestamp keys in the output.
	if !record.Time.IsZero() && !h.hasTimestampHook() {
		event.Time(TimestampFieldName, record.Time)
	}

	event.Msg(record.Message)
	return nil
}

// hasTimestampHook reports whether the logger has a timestampHook installed,
// which would cause duplicate timestamp fields if we also emit record.Time.