Postgres returns rows that tie on an ORDER BY in no particular order,
and not the same one twice. The medication reads ordered by columns two
rows share all the time: every read that hands schedules on included
them with no order at all, medications were listed by createdAt alone
(one import writes many in a millisecond), intakes by scheduledFor (a
twice-daily medication puts every morning dose on one instant), and
"the latest intake" lookups by takenAt. A client read the same account
in a different order from one request to the next, and a latest-intake
lookup picked either of two rows.
Every findMany / findFirst on a medication table, nested includes
included, now ends its order on the id in the direction of its last key,
and schedules are read by window, then id (MEDICATION_SCHEDULE_ORDER, the
order the backup already wrote). medication-read-order-guard.test.ts
holds the tree to it. medication-read-order.test.ts writes tying rows in
the opposite order to the one each read promises, through the medication
list and today's intakes, and fails without the tie-breakers.
The parity suite's own state reader had the same gap: it sorts rows by
content with the ids blanked, and rows that tie then kept whatever order
the unordered read returned, so their <id:N> labels swapped under a
loaded run. Its reads are ordered by id, which for a cuid is the order
the rows were written in.
The JSON import's schema left the route, so its entry in the inline
schema strictness register goes; the schema module says why its objects
are not strict.
A start moved earlier, an end moved later or removed, or a medication
made active again reopened past slots, and the auto-take pass filled up
to a week of them as taken. The course window writer and the
re-activation paths now move the auto-take floor to the moment of the
edit.
The row update (name, schedule, oneShot) committed before the course
write. When a concurrent course made the course write refuse, the client
got the refusal while the rest was already written. The schedule replace,
the row update, the pause era and the course write now commit together,
so a refusal leaves the medication unchanged. The rollup recompute runs
after the commit.
The backfill and the restore of an older file read the creation day of
an end-only window in UTC while every reader of the window uses the
account's zone; both now use the account's zone (the default zone when
the stored one is unknown to Postgres). A window whose start lies after
its end, which the API refuses but older rows hold, becomes a one-day
course on the end day: every reader treated it as empty and ended, and
a swap would have invented expected doses. One shared rule
(courseFromWindow) serves the restore and the course writer.
The PUT wrote startsOn/endsOn on the row and then rewrote the latest
course in a second transaction, so a failure between the two left the
row and its courses disagreeing. The window now reaches the row only
through the course writer, which writes both under one lock.
A medication with no course rows and no window is running since its
creation; a course added beside it projected the medication into ending,
which stopped its reminders and dropped its history from compliance. The
create now refuses that (medications.course.currentOpen; End course
writes the first course). A window the rows never recorded is
materialised as the first course before the new one is checked.
A medication taken now and then (#1024) keeps one row and gains course
rows: calendar spans, both ends inclusive, an optional encrypted note, no
schedule or dose of their own. Courses never overlap and every course but
the latest has ended, so the latest course is always the one the
medication's startsOn/endsOn project. src/lib/medications/courses.ts is
the only writer of those two columns for a medication with courses; it
writes under a per-medication advisory lock and re-projects in the same
transaction, so reminders, the next-due line and intakeActionable keep
reading the columns and stay right.
- Migration 0368 adds medication_courses and backfills one course per
medication window (an end-only window starts on the creation day, or
on its end day when that lies earlier); a medication without a window
stays course-less. Idempotent, data-preserving.
- GET/POST /api/medications/{id}/courses and PATCH/DELETE
.../courses/{courseId} (owner-only); create seeds the first course
from a window; the medication PUT edits the latest course and refuses
a window that would break the rules (medications.course.*).
- List, detail, create and update carry courses, courseCount,
previousCourseEndedOn and canStartCourse, resolved on the server.
- Compliance expands over the span of all courses and drops the slots
between them; every compliance read selects the courses. A rolling
cadence is not anchored by an intake from a previous course.
- The card names the last course's end and the running course's number;
the detail Lifecycle group lists the courses with start, edit and
delete. The Coach compliance block, the MCP resource, the doctor
report window and table, the clinician view and FHIR (one
MedicationStatement per course with effectivePeriod and status) read
the courses.
- Backup carries courses per medication and the restore writes them and
re-projects; an older file derives the one course its window
describes. Wipe plan, encrypted columns, rotation and OpenAPI follow.
Marc-André Bombeck