fix(handler): update default sort retrieval logic

pkg/common/types_test.go

@@ -26,6 +26,18 @@ func TestResolveSortColumns(t *testing.T) {
 	}
 }
 
+func TestResolveSortColumnsDesc(t *testing.T) {
+	sort := []SortOption{
+		{Column: PrimaryKeySortColumn, Direction: "desc"},
+	}
+
+	got := ResolveSortColumns(sort, "id")
+	want := []SortOption{{Column: "id", Direction: "desc"}}
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("ResolveSortColumns() = %v, want %v", got, want)
+	}
+}
+
 func TestResolveSortColumnsEmptyPK(t *testing.T) {
 	sort := []SortOption{
 		{Column: PrimaryKeySortColumn, Direction: "asc"},

pkg/resolvespec/handler.go

@@ -73,7 +73,7 @@ func (h *Handler) getDefaultSort(schema, name string) []common.SortOption {
 	if h.defaultSort == nil {
 		return nil
 	}
-	if sort, ok := h.defaultSort[defaultSortKey(schema, name)]; ok {
+	if sort := h.defaultSort[defaultSortKey(schema, name)]; len(sort) > 0 {
 		return sort
 	}
 	return h.defaultSort[defaultSortKey("", "")]

pkg/restheadspec/handler.go

@@ -82,7 +82,7 @@ func (h *Handler) getDefaultSort(schema, name string) []common.SortOption {
 	if h.defaultSort == nil {
 		return nil
 	}
-	if sort, ok := h.defaultSort[defaultSortKey(schema, name)]; ok {
+	if sort := h.defaultSort[defaultSortKey(schema, name)]; len(sort) > 0 {
 		return sort
 	}
 	return h.defaultSort[defaultSortKey("", "")]