Three routes in admin.ts answered a miss with a success. PUT /items/:id ran an UPDATE that matched nothing, committed happily, selected nothing back and replied 200 with an empty body — a success the admin client could do nothing with, and no record anywhere that the item was not found. mark-sold and mark-available did the same. The create route beside them has always used requireRow for exactly this, which is why this reads as an oversight rather than a decision.
A garbage id was worse in a different direction. Number('abc') is NaN, the driver sends it to Postgres as the text "NaN", Postgres raises 22P02 for an integer column, and the catch turned that into a 500 — so a caller asking for an item that cannot exist was told the server broke. Both now answer 404, because from the caller's side "/items/abc" identifies no item in exactly the way "/items/999999" does.
readId is shared rather than repeated, and rejects zero, negatives and fractions as well as text: every id in this schema is a positive serial, so anything else identifies nothing.
mark-sold now notifies favouriters only after the row is known to exist, so nobody is told about a sale that did not happen.
The issue asked for the same shape to be checked across the other admin routes. It was: unpublish already looks the item up and 404s, and the tags and categories PUT routes both do an existence check before their UPDATE, so their rows[0] is guaranteed. items.ts already guards the public read. These three were the only ones lying about a miss.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Three routes behind the admin gate: list, create, revoke. A link is named because provenance matters more than convenience — when one is shared further than intended the question is which one, and every submission will record the link it arrived through, so revoking kills that link rather than the feature.
The token is returned by exactly one response and is unrecoverable afterwards, which is why the admin screen has to present it as a one-time reveal. The listing selects its columns explicitly rather than `SELECT *`, so `token_hash` cannot reach a response the moment somebody adds a convenience — and a test asserts the listing carries neither the token nor the digest.
An absent `maxSubmissions` gets a bounded default of 25 rather than null. Absent means nobody decided; an explicit null means unlimited, which is a decision visible in the request. Reading absent as unlimited is what would quietly make every link unbounded, and the common case is the one that has to be safe.
Revoking is idempotent through COALESCE, and a test asserts the second call returns the *same* timestamp rather than merely succeeding. The useful fact is when access ended, and a button that errors on a double-click teaches people to distrust it — which is the last thing wanted on the control that contains a leak.
Mounted above the `/api/admin` catch-all, which would otherwise swallow the path, and behind requireAdminGate on the router itself per the reasoning in middleware/adminGate.ts.
Lint caught me reintroducing something this codebase had already solved: I wrote `.replace(/\/+$/, '')` to trim PUBLIC_URL, and app.ts carried a hand-written loop with a comment explaining that exact regex backtracks. Rather than duplicate the loop, trimTrailingSlashes moved to utils.ts and both callers now share it.
Backend: 272 integration (9 new), 308 unit, lint back to its 6 pre-existing warnings, build clean.
Ref #222
Indexing an array now yields `T | undefined`, which is what it always did — the compiler simply says so. Enabled in backend/tsconfig.json and frontend/tsconfig.json, and in tsconfig.sonar.json alongside it so the drift guard stays satisfied.
The sequencing this issue insisted on was right, and the numbers show why. Before #159 typed the query results, `rows[0]` was `any` and `any` indexes to `any`: the flag would have found close to nothing and the count would have changed completely afterwards. With the rows typed it finds 57 — 50 in the backend, 4 in the frontend, 3 in the Playwright suite — and they fall into three kinds.
Thirty are `rows[0]` after a `rows.length` guard. TypeScript cannot connect the two, and rewriting them as `const [row] = rows; if (!row) …` makes the guard and the use the same check, which is better code independently of the flag.
Ten are rows a statement guarantees — `INSERT … RETURNING`, or a lookup for an id the session middleware has already matched. These get `requireRow(rows, what)`, a new helper in db.ts that throws naming the query. A thrown error rather than a non-null assertion: if the assumption is ever wrong, an assertion hands `undefined` to the next line and fails somewhere unrelated, whereas this fails at the query and says which. asyncRoute turns it into a 500, which is the right answer for "the database did not do what the statement says it does". It also states the assumption once instead of ten times.
The rest is ordinary indexing the compiler cannot prove: a regex capture group that the pattern guarantees, `split('+')[0]`, a modulo kept in range, `hasOwnProperty` failing to narrow an index signature, and Express typing route params as an index signature so `req.params.itemId` is `string | undefined` on a route that cannot match without it.
One correction to this issue's premise, which matters for what it was expected to find. The body says "in a handful it does not guard at all", and the unguarded-500 risk it describes was not found. Every `rows[0]` either sits behind a length check or behind a statement that guarantees a row. What the flag actually bought was the ten places where that guarantee was real but unstated, and those now say so.
Two changes worth calling out because they are not mechanical. TAG_COLORS is typed `[string, ...string[]]` in both copies rather than `as const` — the first attempt used `as const`, which narrowed the elements to literals and broke adminTags, so the annotation keeps `string` while telling the compiler index 0 exists. And the filter drawer's slider falls back to the bounds it was given rather than to null, because null there reads as "no filter" and would widen the results rather than leave them unchanged.
Test files needed changes too, since ts-jest compiles them against the same config: a regex destructure in the compose guard, and ten `mock.calls[0][0]` reads where the surrounding assertions already establish the call happened.
Verified: tsc clean over backend, frontend src and the Playwright suite; unit 254/254; integration 238/238; frontend build clean; lint unchanged in both workspaces.
Closes#101
Adds a self-referencing categories tree, a tag registry with
deterministic colours, and item_tags, plus admin CRUD for both.
GET /api/items now accepts category, tags, min_price and max_price.
Category matching walks the subtree with a recursive CTE so selecting a
parent includes everything filed beneath it; tags match with AND via a
count check, since ANY() alone would return items carrying only one of
them. Malformed filter params return 400 rather than being ignored, so a
broken link doesn't quietly list the whole catalogue.
GET /api/filters serves the drawer its tree, tags, and price bounds in
one request.
Item image/tag aggregation moves from LEFT JOIN + GROUP BY to scalar
subqueries. Joining two one-to-many relations multiplies their rows, so
an item with 2 images and 3 tags would have repeated every image three
times once tags were added.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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