Tencent/WeKnora · error

cannot move a folder into itself

Error message

cannot move a folder into itself

What it means

Raised in RenameOrMoveFolder when moving a folder whose target parent (newParentID) equals the folder's own ID — a folder cannot become its own child, which would create a cycle in the wiki folder tree. Structural-invariant guard.

Source

Thrown at internal/application/service/wiki_page.go:1645

	}

	name := folder.Name
	if strings.TrimSpace(newName) != "" {
		if name, err = validateFolderName(newName); err != nil {
			return nil, err
		}
	}

	targetParent := folder.ParentID
	if moveParent {
		targetParent = newParentID
	}

	parentPath := ""
	depthBase := 0
	if targetParent != types.WikiFolderRootID {
		if targetParent == folder.ID {
			return nil, errors.New("cannot move a folder into itself")
		}
		parent, err := s.repo.GetFolderByID(ctx, kbID, targetParent)
		if err != nil {
			return nil, err
		}
		if parent.Path == folder.Path || strings.HasPrefix(parent.Path, folder.Path+"/") {
			return nil, errors.New("cannot move a folder into its own descendant")
		}
		parentPath = parent.Path
		depthBase = parent.Depth
	}

	if existing, err := s.repo.GetChildFolderByName(ctx, kbID, targetParent, name); err == nil {
		if existing.ID != folder.ID {
			return nil, repository.ErrWikiFolderConflict
		}
	} else if !errors.Is(err, repository.ErrWikiFolderNotFound) {
		return nil, err

View on GitHub (pinned to 988cbb0330)

Solutions

1. Choose a different target parent folder
2. Skip the move when the client sends the folder's own id as parent

When it happens

Trigger: Thrown at internal/application/service/wiki_page.go:1645 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Tencent/WeKnora@988cbb0330 (2026-09-02). Data as JSON: /api/errors/65f917da3c66ede2. Report an issue: GitHub.