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verdande/internal/store/migrations/0025_user_settings_per_scope.sql
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Kristian WindandClaude Opus 5 6b4448b245 fix(settings): AI, Gmail og kalenderen delte én række og slettede hinanden
Meldt ind som "AI-informationerne gemmes ikke". De blev gemt. De blev taget
bagefter.

`user_settings` blev oprettet med `user_id` som hele sin primærnøgle — én række
per person, uanset scope — og upserten skrev `scope` om ved konflikt. Der er tre
scopes i live: `ai`, `gmail` og `calendar`. De delte den ene række, så hver
skrivning slettede de to andre, og hver eneste svarede 204. Det virker begge
veje: at forbinde kalenderen slettede Gmail-forbindelsen, og Gmail slettede
kalenderen.

Fælden var set komme to gange. 0011 gav instansens indstillinger deres egen
tabel delvis af den grund og skrev advarslen ned med rene ord; 0014 flyttede
postkasserne ud og skrev, at advarslen "nær var trådt i for anden gang". Tredje
gang var kalenderen, som lagde et `calendar`-scope ved siden af de to andre.

Lektien værd at holde fast i: en advarsel i en migration bliver læst af den, der
redigerer *den* migration, og det var ingen. Formen er rettet her, så der ikke er
noget tilbage at advare om — `PRIMARY KEY (user_id, scope)`, og upserten rammer
den nøgle.

Tabellen bygges om, fordi SQLite ikke kan ændre en primærnøgle på plads. De rækker,
der findes, kopieres som de er: hver person har højst én, og den holder det scope,
der vandt sidst. Det, de tidligere skrivninger tog, er overskrevet og kan ikke
hentes tilbage her — efter opdateringen skal AI-udbyderen sættes op igen, og
Gmail-forbindelsen tjekkes.

To prøver: én mod store-laget, hvor formen var fejlen, og én gennem handlerne,
hvor den blev set.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-20 14:56:48 +02:00

38 lines
1.8 KiB
SQL

-- One row per person *and scope*, which is what the table always meant.
--
-- `user_settings` was created with `user_id` as its whole primary key, and its
-- upsert rewrote `scope` on conflict. So a person had exactly one settings row,
-- and whichever scope was written last was the only one that survived: saving an
-- AI provider deleted the Gmail connection, and connecting a calendar deleted the
-- AI provider. Nothing reported it — the write succeeded, and the loss was in the
-- row it landed on.
--
-- This was seen coming twice. Migration 0011 gave the instance's settings their
-- own table partly for this reason and wrote the warning down in as many words;
-- 0014 moved mailboxes out and said the warning "was nearly walked into a second
-- time". The third time was the calendar, which added a `calendar` scope beside
-- `ai` and `gmail` — and walked in.
--
-- The lesson worth keeping: a warning in a migration is read by whoever is editing
-- *that* migration, and nobody was. The shape is fixed here so there is nothing
-- left to warn about.
--
-- SQLite cannot change a primary key in place, so the table is rebuilt. Existing
-- rows are copied as they are: each person has at most one, and it holds whatever
-- scope won last. What the earlier writes lost is already gone and cannot be
-- recovered here — the values were overwritten, not orphaned.
CREATE TABLE user_settings_new (
user_id TEXT NOT NULL REFERENCES users (id) ON DELETE CASCADE,
scope TEXT NOT NULL DEFAULT 'general',
values_json TEXT NOT NULL DEFAULT '{}',
updated_at INTEGER NOT NULL,
PRIMARY KEY (user_id, scope)
);
INSERT INTO user_settings_new (user_id, scope, values_json, updated_at)
SELECT user_id, scope, values_json, updated_at FROM user_settings;
DROP TABLE user_settings;
ALTER TABLE user_settings_new RENAME TO user_settings;