Error trying to add New Category

[Terisa de morgan]

When I'm trying to add a new user cathegory from the left bar I get the following error:

Spoiler:

calibre, version 6.22.0
ERROR: Excepción no considerada: <b>TypeError</b>:'NoneType' object is not iterable

calibre 6.22 embedded-python: True
Windows-10-10.0.19041-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19041')
Python 3.10.1
Windows: ('10', '10.0.19041', 'SP0', 'Multiprocessor Free')
Interface language: es
Successfully initialized third party plugins: DeACSM (0, 0, 16) && Gather KFX-ZIP (from KFX Input) (2, 1, 0) && DeDRM (10, 0, 3) && Package KFX (from KFX Input) (2, 1, 0) && Action Chains (1, 18, 8) && Annotations (1, 17, 13) && Barnes & Noble (1, 5, 2) && Clean Comments (0, 2, 1) && Comments Cleaner (1, 10, 0) && Count Pages (2, 11, 2) && Diaps Editing Toolbag (0, 4, 0) && Edit Columns (0, 1, 0) && Editor Chains (0, 8, 7) && EpubMerge (2, 15, 0) && EpubSplit (3, 6, 0) && Ex Libris (1, 1, 20) && Extract ISBN (1, 6, 0) && Extract ToCs (1, 0, 0) && Fantastic Fiction (1, 6, 3) && Favourites Menu (1, 3, 0) && Find Duplicates (1, 10, 8) && Generate Cover (2, 3, 2) && GetFileName (0, 2, 0) && Goodreads (1, 7, 9) && Goodreads Sync (1, 16, 3) && GoodreadsAuthor (0, 0, 2) && Hyphenate This! (0, 1, 3) && Import List (1, 9, 0) && KFX metadata reader (from KFX Input) (2, 1, 0) && KFX Input (2, 1, 0) && KindleUnpack - The Plugin (0, 83, 1) && Kobo Books (1, 9, 2) && Kobo Utilities (2, 16, 9) && KoboTouchExtended (3, 6, 3) && Last Modified (0, 8, 4) && Modify ePub (1, 8, 1) && My Tools (0, 2, 1) && Obok DeDRM (10, 0, 3) && Overdrive Link (2, 55, 0) && Owned Books Goodreads (0, 1, 0) && Quality Check (1, 13, 4) && Reading List (1, 15, 1) && Save Composite Custom Columns (1, 1, 1) && Search The Internet (1, 10, 1) && SmartEject (2, 5, 0) && Smashwords Metadata (1, 0, 2) && Tanja's Tools (0, 1, 0) && User Category (1, 6, 0) && View Manager (1, 10, 2) && Vimstyle (0, 0, 3) && Overdrive Link Metadata Source (2, 55, 0)
Traceback (most recent call last):
File "calibre\gui2\tag_browser\ui.py", line 152, in do_add_subcategory
File "calibre\gui2\tag_browser\model.py", line 1636, in index_for_path
TypeError: 'NoneType' object is not iterable

And no cathegory is created.

[chaley]

This happens because you have checked the preference Preferences / Look & feel / Tag browser / Hide empty categories. I found the problem a week or two ago but haven't done anything about it.

It does in fact create a new category named "New category". However, because this category is empty it can't be displayed, which means the attempt to show its editing box will fail.

The easiest fix is to refuse to allow creating new subcategories if the option is checked, telling you that you must change the option. I might do this because even if I allowed entering a name the category would be hidden and thus unusable.

You can see the "invisible" categories in "Manage categories", where you can rename them and add items to them.

[Terisa de morgan]

Originally Posted by chaley

This happens because you have checked the preference Preferences / Look & feel / Tag browser / Hide empty categories. I found the problem a week or two ago but haven't done anything about it.

It does in fact create a new category named "New category". However, because this category is empty it can't be displayed, which means the attempt to show its editing box will fail.

The easiest fix is to refuse to allow creating new subcategories if the option is checked, telling you that you must change the option. I might do this because even if I allowed entering a name the category would be hidden and thus unusable.

You can see the "invisible" categories in "Manage categories", where you can rename them and add items to them.

Thank you, I'll check tomorrow (I wasn't aware of the option, I guess I checked long time ago, when I began to use user categories.