Marc-André Bombeck
1d2744a109
fix(api): give every offset-paged list a unique tiebreaker
...
`/api/measurements` and `/api/labs` sort on one non-unique column and
page with `skip`/`take`. When the sort key ties, Postgres does not
promise the same order for the query that fetches page N and the one
that fetches page N+1, so a client paging its own history can receive a
row twice and never receive another — silently, on both sides.
Ties are not hypothetical here. The partial unique index forbids two
live measurements of the same type at one instant, but the tie that
occurs in production is the cross-type one: a daily `stats:` rollup
posts steps, distance, flights and active energy at the identical
timestamp, and an unfiltered history list pages straight through the
block. A lab panel drawn in one sitting shares `takenAt` across every
analyte in it.
Appending `{ id: <same direction> }` to the `orderBy` makes the order
total. Same fix on the five siblings that page the same way — medication
intake history, illness day-logs, custom-metric entries, reminder
history, mental-health assessments — because the defect is the shape,
not the two routes it was found on. No wire change; `/api/sync/changes`
already ordered this way.
The fixtures seed ids in an order unrelated to insertion order, so the
assertion on order inside the tied block can only hold if the secondary
key is doing the work: with the tiebreaker removed the new file fails on
all three cases.
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