add log for update custom meta

Author: Hitenjain14

code/go/0chain.net/blobbercore/handler/object_operation_handler.go

@@ -1261,8 +1261,13 @@ func (fsh *StorageHandler) CreateDir(ctx context.Context, r *http.Request) (*all
 		// target directory exists, return StatusOK
 		if exisitingRef.Type == reference.DIRECTORY {
 			if exisitingRef.CustomMeta != customMeta {
+				logging.Logger.Info("Updating custom meta", zap.String("path", exisitingRef.Path))
 				_ = datastore.GetStore().WithNewTransaction(func(ctx context.Context) error {
-					return reference.UpdateCustomMeta(ctx, exisitingRef.ID, customMeta)
+					err := reference.UpdateCustomMeta(ctx, exisitingRef, customMeta)
+					if err != nil {
+						logging.Logger.Error("Error updating custom meta", zap.Error(err))
+					}
+					return err
 				})
 			}
 			return nil, common.NewError("directory_exists", "Directory already exists`")

code/go/0chain.net/blobbercore/reference/ref.go

@@ -670,7 +670,7 @@ func GetListingFieldsMap(refEntity interface{}, tagName string) map[string]inter
 	return result
 }
 
-func UpdateCustomMeta(ctx context.Context, refID int64, customMeta string) error {
+func UpdateCustomMeta(ctx context.Context, ref *Ref, customMeta string) error {
 	db := datastore.GetStore().GetTransaction(ctx)
-	return db.Model(&Ref{}).Where("id = ?", refID).Update("custom_meta", customMeta).Error
+	return db.Model(ref).Update("custom_meta", customMeta).Error
 }