redis/go-redis · error

redis: invalid database number: %q

Error message

redis: invalid database number: %q

What it means

Error "redis: invalid database number: %q" thrown in redis/go-redis.

Source

Thrown at options.go:773

func setupTCPConn(u *url.URL) (*Options, error) {
	o := &Options{Network: "tcp"}

	o.Username, o.Password = getUserPassword(u)

	h, p := getHostPortWithDefaults(u)
	o.Addr = net.JoinHostPort(h, p)

	f := strings.FieldsFunc(u.Path, func(r rune) bool {
		return r == '/'
	})
	switch len(f) {
	case 0:
		o.DB = 0
	case 1:
		var err error
		if o.DB, err = strconv.Atoi(f[0]); err != nil {
			return nil, fmt.Errorf("redis: invalid database number: %q", f[0])
		}
	default:
		return nil, fmt.Errorf("redis: invalid URL path: %s", u.Path)
	}

	if u.Scheme == "rediss" {
		o.TLSConfig = &tls.Config{
			ServerName: h,
			MinVersion: tls.VersionTLS12,
		}
	}

	return setupConnParams(u, o)
}

// getHostPortWithDefaults is a helper function that splits the url into
// a host and a port. If the host is missing, it defaults to localhost
// and if the port is missing, it defaults to 6379.

View on GitHub (pinned to c5cad058c7)

When it happens

Trigger: Thrown at options.go:773 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of redis/go-redis@c5cad058c7 (2026-09-01). Data as JSON: /api/errors/19b89eb6b5127ac9. Report an issue: GitHub.