sqlite-utils/sqlite_utils
Simon Willison 16bbfb582d add_foreign_keys() errors instead of silently dropping action changes
The existing-foreign-key dedup compared only columns and other_table, so
requesting an FK that already exists with different ON DELETE/ON UPDATE
actions was a silent no-op - and with add_foreign_key() raising "already
exists", there was no signal that the requested actions were dropped.
An exact match (including actions) is still skipped for idempotency;
a mismatch now raises AlterError pointing at table.transform().

Also validates that compound foreign keys passed as 4-tuples have the
same number of columns on both sides - extra other-columns were being
silently discarded, e.g. ("t", ("a",), "other", ("a", "b")) created a
single-column key referencing just "a".

Refs https://github.com/simonw/sqlite-utils/issues/769#issuecomment-4900034150

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-06 21:53:48 -07:00
..
__init__.py New migrations system, ported from sqlite-migrate (#754) 2026-06-21 09:40:21 -07:00
__main__.py Support 'python -m sqlite_utils', closes #368 2022-01-08 18:33:22 -08:00
cli.py migrate --stop-before an already-applied migration is now an error 2026-07-06 21:50:05 -07:00
db.py add_foreign_keys() errors instead of silently dropping action changes 2026-07-06 21:53:48 -07:00
hookspecs.py More type annotations (#697) 2025-12-16 22:11:47 -08:00
migrations.py migrate --stop-before an already-applied migration is now an error 2026-07-06 21:50:05 -07:00
plugins.py fix: Plugins are still loaded when running tests (#719) 2026-06-21 16:14:45 -07:00
py.typed py.typed file so mypy picks up the types, closes #331 2021-11-14 15:21:04 -08:00
recipes.py More type annotations (#697) 2025-12-16 22:11:47 -08:00
utils.py Preserve duplicate column names in query results 2026-07-05 21:20:39 -07:00