ankitects/anki

Preview does not update when changing the flag

Open

#4832 opened on May 13, 2026

View on GitHub
 (2 comments) (0 reactions) (0 assignees)Rust (27,973 stars) (2,965 forks)batch import
good first issue

Description

Steps to reproduce

Add {{CardFlag}}{{Tags}} to the basic note type’s template. Open the preview in the card browser. Make a new basic note. Flag the card (right click → flag → red). It still shows “flag0”.

Alternatively:

Click on “Cards…” and change the template. Then save and note that the preview hasn’t changed.

If you mark the note (right click → notes → toggle mark) or more generally add/remove tags, it updates correctly. Expected behavior The preview should always update after flagging, changing the template or any event that can change the card. Debug info Anki 25.09.2 (3890e12c) (ao) Python 3.13.5 Qt 6.9.1 PyQt 6.9.1 Platform: Windows-10-10.0.19045-SP0

===Add-ons (active)=== (add-on provided name [Add-on folder, installed at, version, is config changed]) Advanced Copy Fields ['1898445115', 2024-01-08T20:01, 'v0.4.01', ''] AnkiConnect ['2055492159', 2025-11-09T22:40, 'None', mod] AnkiWebView Inspector ['31746032', 2023-06-27T22:26, 'None', ''] Disconnected Review-Log Cleaner ['1067771610', 2025-06-10T16:28, 'None', ''] Local Audio Server for Yomichan ['1045800357', 2023-06-19T06:57, 'None', ''] The KING of Button Add-ons ['374005964', 2025-01-28T01:26, 'None', mod]

===IDs of active AnkiWeb add-ons=== 1045800357 1067771610 1898445115 2055492159 31746032 374005964

===Add-ons (inactive)=== (add-on provided name [Add-on folder, installed at, version, is config changed]) No Distractions Full Screen Fixed by Shige ['1370336700', 2024-08-26T08:08, 'None', mod]

Originally reported on https://forums.ankiweb.net/t/bug-preview-does-not-update-when-changing-the-flag-or-template/69659

Contributor guide

Tech stack
rustpython
Domain
desktop
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
basic Pythonfamiliarity with Qt signals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
Investigate the preview update mechanism in the Anki codebase. Look for the preview widget implementation, likely in `qt/aqt/editor.py` or similar files. Check how flag changes and template edits trigger updates, and why the preview fails to refresh. The issue reports that marking notes works but flagging does not, suggesting a missing signal connection or a conditional update path.