Free resources for correct update behaviour (for developers only)

AnkiWeb addon 1873344186

Demonstrates for developers how add-ons locking files like SQLite databases should release them on deletion or update, allowing multi-threaded database access; includes previous solution attempt and __init__.py explanation.
AI-generated summary; may contain mistakes.

backup-maintenance developer-tools

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AnkiWeb

Rating: 0 (👍 0 · 👎 0)
Updated: 2020-03-23
Anki versions: 2.1.20~
Description language: en

Maintenance

abandoned

Last update or commit was 2383 days before the snapshot (2020-03-23).

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Version branches

Min Anki	Max Anki	Updated
2.1.20	+	2020-03-23

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Description

This addon is an example for developers, whose addons lock files in the addon folder (e.g. an sqlite database). These files need to be removed before the addon is deleted / updated. Especially updating caused some tricky-to-fix bugs, but In the end it turned out to be super simple: Allow access to the db from multiple threads (I wasn't aware that this was possible) and release it, whenever an addon is deleted. The addon contains my previous solution attempt, maybe it's helpful for others in the future. If you want to experiment with this addon, install it and then lower its mod number (in meta.json). This causes Anki to update. I added an explanation to __init__py.