models/dataset.go

@@ -348,7 +348,7 @@ func GetDatasetByRepo(repo *Repository) (*Dataset, error) {
 	if has {
 		return dataset, nil
 	} else {
-		return nil, errors.New("Not Found")
+		return nil, ErrNotExist{repo.ID}
 	}
 }
 

models/repo.go

@@ -1607,15 +1607,17 @@ func updateRepository(e Engine, repo *Repository, visibilityChanged bool) (err e
 			}
 
 			dataset, err := GetDatasetByRepo(repo)
-			if err != nil {
+			if err != nil && !IsErrNotExist(err) {
 				return err
 			}
+			if dataset != nil {
 				_, err = e.Where("dataset_id = ?", dataset.ID).Cols("is_private").Update(&Attachment{
 					IsPrivate: true,
 				})
 				if err != nil {
 					return err
 				}
+			}
 
 		} else {
 			//If repo has become public, we need set dataset to public