Empty sort appended bug fix

pkg/reflection/helpers.go

@@ -1,9 +1,15 @@
-package common
+package reflection
 
 import "reflect"
 
 func Len(v any) int {
 	val := reflect.ValueOf(v)
+	valKind := val.Kind()
+
+	if valKind == reflect.Ptr {
+		val = val.Elem()
+	}
+
 	switch val.Kind() {
 	case reflect.Slice, reflect.Array, reflect.Map, reflect.String, reflect.Chan:
 		return val.Len()

pkg/restheadspec/handler.go

@@ -293,6 +293,9 @@ func (h *Handler) handleRead(ctx context.Context, w common.ResponseWriter, id st
 		logger.Debug("Applying expand: %s", expand.Relation)
 		sorts := make([]common.SortOption, 0)
 		for _, s := range strings.Split(expand.Sort, ",") {
+			if s == "" {
+				continue
+			}
 			dir := "ASC"
 			if strings.HasPrefix(s, "-") || strings.HasSuffix(strings.ToUpper(s), " DESC") {
 				dir = "DESC"
@@ -523,7 +526,7 @@ func (h *Handler) handleRead(ctx context.Context, w common.ResponseWriter, id st
 
 	metadata := &common.Metadata{
 		Total:    int64(total),
-		Count:    int64(common.Len(modelPtr)),
+		Count:    int64(reflection.Len(modelPtr)),
 		Filtered: int64(total),
 		Limit:    limit,
 		Offset:   offset,
@@ -1531,6 +1534,9 @@ func (h *Handler) FetchRowNumber(ctx context.Context, tableName string, pkName s
 	if len(options.Sort) > 0 {
 		sortParts := make([]string, 0, len(options.Sort))
 		for _, sort := range options.Sort {
+			if sort.Column == "" {
+				continue
+			}
 			direction := "ASC"
 			if strings.EqualFold(sort.Direction, "desc") {
 				direction = "DESC"