Function convertScalarToString

graphql/resolve/query.go:241–260

converts scalar values received from GraphQL arguments to go string If it is a scalar only possible cases are: string, bool, int64, float64 and nil.

(val interface{})

// converts scalar values received from GraphQL arguments to go string
// If it is a scalar only possible cases are: string, bool, int64, float64 and nil.
func convertScalarToString(val interface{}) (string, error) {
	var str string
	switch v := val.(type) {
	case string:
		str = v
	case bool:
		str = strconv.FormatBool(v)
	case int64:
		str = strconv.FormatInt(v, 10)
	case float64:
		str = strconv.FormatFloat(v, 'f', -1, 64)
	case json.Number:
		str = v.String()
	case nil:
		str = ""
	default:
		return "", errNotScalar
	}
	return str, nil
}