Folders: Validator: add temporary fix (#100019)

pkg/services/accesscontrol/ossaccesscontrol/folder.go

@@ -2,6 +2,7 @@ package ossaccesscontrol
 
 import (
 	"context"
+	"errors"
 
 	"github.com/grafana/grafana/pkg/api/routing"
 	"github.com/grafana/grafana/pkg/apimachinery/identity"
@@ -106,6 +107,17 @@ func ProvideFolderPermissions(
 			})
 
 			if err != nil {
+				// if the folder is not found, this may be on the create path,
+				// where the write path to legacy will then go through the read
+				// path and try to read from both legacy & unified before it exists on both
+				if features.IsEnabledGlobally(featuremgmt.FlagKubernetesFoldersServiceV2) && errors.Is(err, dashboards.ErrFolderNotFound) {
+					_, err = folderService.GetLegacy(ctx, &folder.GetFolderQuery{
+						UID:          &resourceID,
+						OrgID:        orgID,
+						SignedInUser: ident,
+					})
+					return err
+				}
 				return err
 			}