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finding(fields): GeolocationField renders a valid 0 coordinate as EMPTY, and leaks a literal 0 into the DOM #8055
Description
Activity
Triage: lands in
domain:ui(packages/fields/src/widgets/GeolocationField.tsx); rationale: class (a) — ⭐ measured by rendering the real widget, with a live control in the same reading, and it is the most clear-cut user-facing defect in this repo's current backlog.Bug.value readonly render { latitude: 30.2741, longitude: 120.1551 }(control)"30.274100, 120.155100View on map"✅{ latitude: 0, longitude: 120.1551 }— a real point on the equator"—0"❌{ latitude: 0, longitude: 0 }"—0"❌⇒ A record holding a valid coordinate displays as no location, and in editable mode the "View on map" button is suppressed for the same value (
["Use Current Location"]against the control's["Use Current Location", "View on map"]). ⛔ Not a formatting nit — the user cannot reach a location the record actually holds.⭐ The card correctly separates two independent defects in one reading, and this must survive into the fix: the falsy emptiness test (
!loc.latitude || !loc.longitude) and the JSX&&-with-a-numeric-operand hazard (0 && xevaluates to0, and React renders the number as a text node — the trailing0in"—0"). ⇒ "Fixing the emptiness test alone would leave it, and fixing the render guard alone would leave the emptiness." Two fixes, ⛔ not one.priority:p2: user-visible and silent — no error, no warning, just an em dash where a coordinate should be. ⛔ Not p1: the stored data is intact and only the display path is affected (objectui#6848 measured and pinned that emission is correct, since'0'is a non-empty string).⚠️ And noteaccuracy: 0at:268is the same shape on a value that is not exotic — it hides the accuracy row and leaks its own stray0.Five sites, and ⛔ one of them must not be touched:
:153formatLocation— the emptiness test:158openInMaps— refuses to open a valid location:174readonly "View on map" — the0-leaking site:210editable "View on map" — same shape:268accuracy row — same shape, also leaks- ⛔
:230value={location.latitude ?? ''}is already correct — it uses??and the input box shows0properly (measured). ⇒ Do not "fix" it into consistency with the others.
⚠️ Two things the card did not measure and ⛔ the fix should not assume: whether the siblingLocationFieldcarries the same display-side shape, and whether any consumer depends on the current empty rendering. ⇒ Both are cheap and belong in the same pass; a sibling with the identical guard would otherwise become card #2 next week.⛔ Correctly out of objectui#6848's scope — that card is the emission path (
handleFieldChange); this is display/read. Different code, different defect class, and #6848's own pin (GeolocationClearEmission.test.tsx) proves the emission side is sound.⛔ This seat grades and routes only: not claimed, not dispatched, no code.
Generated by Claude Code
Claim: session
session_01611D6ZaRaMmwTNQmSbk8MH· branchclaude/issue-8055-geolocation-zero-coordinatePM dispatch（
domain:ui席）。assignee 与本评论由 PM 代设，dev 继承二者、⛔ 不写 assignee 字段、⛔ 不再发第二条 claim。⭐ 卡片正文写得很好 —— 有实测表格、有对照、有精确行号、还自己划了「本卡未测」。⛔ 本简报不重复它。 只做四件事：定范围、给类判据、指出一个现成的点亮控制、划红线。
一、⛔ 裁决：两个缺陷都要修，⛔ 不许只修一个
卡片已经把它们拆开并说明了为什么是两件事，本席复述并升格为硬要求：
缺陷 只修另一个会怎样 1 用对解析后数字的 falsy 判断当「有没有位置」的判据 ⇒ latitude: 0（赤道）或longitude: 0（本初子午线）走了「无位置」分支只修 render guard ⇒ 仍然显示空占位符 2 render guard 写成 {a && b && (…)}，0 && x求值为0，React 把数字 0 当文本节点渲染出来 ⇒ 用户看到—0里那个游离的0只修 emptiness ⇒ 那个 0仍然漏进 DOM⇒ 两个都修。 ⛔ 不接受「先修一个、另一个开后继卡」。
二、⭐ 类判据，⛔ 不是「卡片列的那 5 行」
判据是：
这个文件里，每一处判断「有没有值」的写法，凡其操作数可以合法地是
0，都必须用 nullish 语义而不是 falsy 语义；且每一处 JSX 条件渲染都不得把数字操作数漏成文本节点。⛔ 不要只改卡片列出的那 5 行。 卡片自己写着「Affected sites（re-taken on
main）」—— 那是一次测量的快照，不是穷举保证。⭐ 自己按上面的类判据把文件扫一遍，把你找到的每一处列出来（含卡片没列的，如果有），逐处说明你为什么判它「操作数可以合法是0」或「不可以」。⚠️ 顺带提醒:268的{location.accuracy && (—— 卡片说它同时有两个毛病（accuracy 为0时隐藏整行，且漏一个0）。它和坐标不是同一个字段，但是同一个类。三、⭐⭐ 这张卡自带一个现成的点亮控制，务必用它
卡片
:230：value={location.latitude ?? ''}它今天就是对的 —— 用的是
??，实测输入框正确显示"0"。⇒ 它必须在你改完之后仍然显示
"0"。 这是一个「主体坏了它也不该红」的真控制：它证明你的探针能看见这个组件、能读出0，同时证明你没有把正确的那一处一起「修」坏。⛔ 一个跟着主体一起红的控制不是控制。另外卡片第一行那个
{ latitude: 30.2741, longitude: 120.1551 }的读数"30.274100, 120.155100View on map"是第二个现成控制：非零坐标的渲染必须逐字不变。四、验收
- 负向基线已经在卡片里：
{ latitude: 0, longitude: 120.1551 }今天只读渲染是"—0"，可编辑模式的按钮是["Use Current Location"]（缺 "View on map"）。⇒ 你的 after-state 要让这两个探针都动，且动成卡片写的 expected。 - 消融：从已提交树出发，分别拿掉两个修复（因为它们是两件事，⭐ 消融也要两条腿），先在盘上证明改动落了（marker 计数 和 blob hash），再跑，看它按用例名红、按状态还原（
git diff HEAD为空 且 blob 回原值）。⛔ 只有退出码不算。- ⭐ 两条腿的预期不同，先写下预期再跑：拿掉缺陷 1 的修复 ⇒ 显示回到空占位符；拿掉缺陷 2 的修复 ⇒ 那个游离的
0回来。如果两条腿红的是同一批用例，说明你的用例没有真的把两个缺陷分开。
- ⭐ 两条腿的预期不同，先写下预期再跑：拿掉缺陷 1 的修复 ⇒ 显示回到空占位符；拿掉缺陷 2 的修复 ⇒ 那个游离的
⚠️ 0的写法要小心：断言"0.000000, 120.155100"这种字符串时，注意toFixed(6)的产物；⛔ 不要用一个会被0本身骗过去的断言（例如只断言「不含—」）。
五、卡片自己划出的「本卡未测」两条 —— 处置分开
卡片结尾写：「Whether the sibling
LocationFieldhas the same display-side shape, and whether any consumer depends on the current empty rendering.」处置 LocationField是否同形⭐ 测，并报告。⛔ 但不要顺手修它 —— 那是另一个组件、另一个面。若同形，把读数写进 验收备注并点名后继；若你判它值得单开一张卡，报告给本席由 PM 立卡，⛔ 你不要自己立（本班的 dedup 通道时好时坏，⛔ 不许盲填）。有没有消费者依赖当前的「空」渲染 ⭐ 必须测，这是你这次改动的风险面，不是可选项。有测试/快照/文档在钉「 0坐标显示为空」吗？⚠️ 如果有，那是一条把缺陷钉住的 pin，⛔ 不要默默改它 —— 停下来报告。六、
⚠️ Clause-② —— 由你判 + 载体预授权机械下限：新导出符号、或已发布载荷上的新键，恒
yes；拿不准 ⇒yes。⛔ 不要继承本简报任何一句作为结论。
⚠️ 提醒一条你判的时候该想到的事实：这次大概率既不新增导出符号、也不在已发布载荷上加键（改的是同一个组件内部的判断写法与渲染守卫）—— 但 ⛔ 那是本席的观察，不是替你做的判定，按你实际交付的 diff 判。⭐ 载体预授权：固定拼写行必须落在这条 claim 评论里，而本席 MCP 面上没有编辑评论的工具（按枚举确认）。dev 席的 REST 有
PATCH /issues/comments/{id}⇒ 本席在此预先授权你把你自己测得的Clause-②:行追加到本评论末尾（保留上方全部原文，行内注明 dev 测得、PM 授权）。⚠️ 拼写按字节核对再发：行首Clause-②:、ASCII 冒号0x3a（⛔ 不是全角）、token 紧跟。⛔ 绝不另发第二条 claim 评论 —— 那是misplaced，同样 exit 4 且看起来像已经答了。⚠️ 若判no：本 PR 可以真的落地（本班当前有 6 个 PR 停靠在契约档位上，fable 连续 18 次 429）。⛔ 但这不构成把它判成no的理由 —— 按 diff 判，不按方便判。七、⭐ 枚举，两条轴
①内容轴：谁读了你改动说的东西（
⚠️ 至少包括packages/fields的既有测试、任何钉住渲染字符串的快照、以及文档里描述该 widget 空态的段落）。②位置轴：谁按file:line指着你改的文件，以及我的改动移动了什么行（objectui#8875）。- ⭐ 现成工具：
scripts/cross-file-line-citation-census.mjs（report-only、五种语法）在origin/main上。在分支点和你的分支上各跑一次做机械对照。⚠️ 单语法 grep 会漏（本班在 A dataset-bound KPI tile can render no sub-caption at all: DatasetWidget drops every measure after values[0] and never reads options.description #7293 上实测漏掉了 continuation 形）。 - ⭐ 分清两类，只修一类：(A) 在
origin/main上指得准、被你挪偏 ⇒ 本 PR 修；(B) 本来就指不准 ⇒ ⛔ 不碰，归 objectui#8875。判法是找锚点，⛔ 不是比行号。⛔CHANGELOG.md里的行号一律不碰。 ⚠️ ⚠️ 本班刚实测到的一条新风险：一条你在分支上修好的path:line引用，可能被「你测量之后、你合并之前」落进同一文件的别的改动再次作废，且悄无声息（本地全绿、CI 无门、落地后无信号）。⇒ 若你做了 (A) 类修复，在最后一次 push 前重跑一次对照，别用半小时前的读数交付。
八、⛔ 红线
⛔ 不修
LocationField（测了报告即可）· ⛔ 不改任何在钉「0显示为空」的既有 pin（撞上就停下来报告）· ⛔ 不扩范围（相关事实进验收备注并点名后继）。
⛔ 绝不编辑共享主检出（用专属 worktree）· ⛔ 绝不git stash· ⛔ 绝不按名杀进程 · ⛔ 不碰content/docs/releases/· ⛔ 不碰 governed surface。⚠️ 工具链（本班实测两次假绿）：pnpm --filter PKG exec vitest run FILE被 objectui#3378 守卫拒绝，会静默跑 console 的 22 个文件报绿；pnpm --filter PKG test在无test脚本的包上匹配零个脚本 exit 0。⛔ 都不是读数。从仓根：pnpm exec vitest run packages/PKG/src/FILE。
⚠️ 门 exit 2 = PREREQUISITE NOT MET（工作区未构建）⇒ 读作 NOT MEASURED，⛔ 不是红、更不是绿。同类：check:readme-exports会自报「the population COLLAPSED — this run proves nothing」。
⚠️ check-clause2-carriers.mjs的裸 CLI 读的是 objectstack：在本仓核对必须PM_SWEEP_REPO=objectstack-ai/objectui，否则 exit 2「the pair could not be formed」不是清白。
⚠️ 共享身份os-zhuang的 GitHub API 间歇性限流 —— git 能答的走 git；⛔ 永不在循环里重试。
Clause-②: no — dev 席实测，PM 已在本评论第六节预先授权追加。
判据（按 diff，不按方便）：本 PR 无新导出符号、也无已发布载荷上的新键。机械证据：
packages/fields/dist/index.d.ts分别由origin/main与本分支的组件源构建后逐字节对照，完全相同；两个新谓词与那个收窄类型均为模块私有（无export），index.tsx的export *不会再导出它们；emission 路径（handleFieldChange）未被触碰，改的只是同一组件内部的 display/read 判断写法与渲染守卫。PR: #8898
Generated by Claude Code
- 负向基线已经在卡片里：
os-dev-report
{ "issue": 8055, "status": "done", "branch": "claude/issue-8055-geolocation-zero-coordinate", "pr": "https://github.com/objectstack-ai/objectui/pull/8898", "premise_still_valid": true, "summary": "Both defects fixed, not one. Swept the whole file against the class criterion (23 conditional/coercion sites, each with a stated verdict) rather than taking the card's 5-site snapshot: the same 5 sites are the class hits, and the sweep additionally found a SECOND already-correct nullish site the card did not name (`value={location.longitude ?? ''}`, the twin of the `:230` control). Both were left untouched. The fix is one predicate that is nullish AND boolean-valued, because the two defects need both properties and neither implies the other: nullish so `0` counts as present (defect 1), boolean so `&&` can never hand React a number to render as a text node (defect 2). Deliberate refinement over the card's literal wording: the predicate also excludes `NaN`, as the old falsy guard did, so the behavioural delta is EXACTLY `0`/`-0`; a bare `!= null` would have started rendering \"NaN, NaN\" at a surface that has always shown the placeholder for an unreadable coordinate. `Infinity`, `null`, `undefined`, a half pair and a non-number all answer as before, and that boundary is pinned as a control. Published surface byte-identical: `dist/index.d.ts` built from origin/main's widget and from this branch's, diffed, identical. assignee inherited from PM and never written; no second claim comment posted. Not governed (`check-governed-queue-guard.mjs --test` says NOT GOVERNED), so no maintainer-brief section.", "tests": "ALL heavy runs via the shared verify lock (OS_VERIFY_LOCK_SLOT=dev-8055-objectui), verdicts quoted from the wrapper's own `VERDICT command-exit` line, never a bare $?. BUILD `pnpm --workspace-concurrency=2 --filter '@object-ui/fields^...' run build` exit 0. TYPECHECK `pnpm --filter @object-ui/fields run type-check` exit 0 (covers `tsc --noEmit` AND `tsconfig.test.json`, so the new pins are typechecked). NOTE: the FIRST type-check returned exit 2 = PREREQUISITE NOT MET (workspace unbuilt, \"Cannot find module '@object-ui/components'\") — recorded as NOT MEASURED, not red; re-run green after the closure build. UNIT `pnpm --filter @object-ui/fields run test` -> 154 files / 2638 tests, all passed. CONSUMER `pnpm --filter @object-ui/plugin-detail run test` -> 155 files / 1415 tests, all passed (the only cross-package renderer of this widget). LINT `pnpm --filter @object-ui/fields run lint` -> 0 errors (987 pre-existing warnings; my two files contribute none). NEW PINS -> 15 passed. NEGATIVE BASELINE: the new pins run against origin/main's version of the widget -> 10 failed | 5 passed, and the 5 that pass are EXACTLY the 5 controls. Reproduced the card verbatim: `Received: \"—0\"`. ABLATION, two legs, expectations written down before running. Mechanics on both legs and on the baseline swap: `trap RESTORE EXIT INT TERM` where RESTORE runs `git checkout HEAD -- ABSOLUTE_PATH`; on-disk proof BEFORE reading any result = deleted-text grep -c + injected-marker grep -c + `git hash-object` compared against the HEAD blob (empty hash treated as FAILURE, equal-to-HEAD treated as a no-op and the reading VOID); restore proven by STATE — blob back to the HEAD value AND `git diff HEAD` empty — never by an exit code. No build/dist on the path: the pins import the widget by a same-package relative SOURCE specifier, so dist never participates. LEG 1 (defect 1: presence predicate body -> `!!n`, still boolean so defect 2 stays fixed) predicted 'display back to the empty placeholder, NO stray 0' -> observed 7 failed / 8 passed, as predicted. LEG 2 (defect 2: readonly guard -> `{location.latitude && location.longitude && (…)}`, presence still nullish) predicted 'coordinates still render, the stray 0 returns' -> observed 3 failed / 12 passed, as predicted, failing with `expected [ '0' ] to deeply equal []`. SEPARATION PROVEN: red only under leg 1 = the four 'renders the coordinates / renders the accuracy row' tests; red only under leg 2 = 'readonly: the coordinates row has no bare text-node children'. Red under both = the two readonly 'View on map' affordance tests, which is honest — that single site carried both defects, so it is the consequence of either and deliberately not the separator. CONTROLS both held: the `?? ''` boxes still show \"0\" after the fix, and the non-zero readonly render is still byte-identical `\"30.274100, 120.155100View on map\"`. Both stayed GREEN on broken main and under both legs.", "mcp_calls": "0 — every GitHub read and write went through repo-scoped REST (probe returned 200) plus git; no MCP GitHub tool was invoked", "open_questions": [ { "question": "PR-body attribution footer: the session-reminder attribution block conflicts with the dispatch contract's fixed footer spelling. I used the contract's session-URL form. Flagging per the 'point out conflicts, never silently pick a side' rule.", "options": [ "A — keep the contract's `_Generated by [Claude Code](https://claude.ai/code/session_...)_` form (what I shipped), since PM tooling greps that spelling", "B — switch to the session-reminder's two-line block" ], "recommendation": "A, because the dispatch contract governs the PR body footer explicitly and names it as the machine-checked spelling; the commit message already carries the reminder's Co-Authored-By / Claude-Session trailers, so both forms are represented where each is read." } ], "out_of_scope_findings": [ "noted, not filed: LocationField was MEASURED for the same display-side shape and does NOT carry it — presence is `isFiniteNumber` (admits 0), the readonly guard's operand is a STRING (`coordinateText(value) || EmptyValue`, \"0, 0\" for a stored zero), and its only other `&&` operand is `string | null`. It already satisfies this card's class criterion by a documented ruling (objectui#6272 option A1) and a LANDED pin already asserts the opposite of this defect: LocationField.specShape.test.tsx, 'carries a zero coordinate as the real place it is, not as a default', asserting textContent === '0, 0'. Re-run green. ⛔ Not touched, and NO card is warranted — 承接者：无，nothing to carry.", "noted, not filed: the consumer-risk half was MEASURED and came back negative — no test, snapshot or doc paragraph anywhere pins '0 geolocation coordinate displays as empty'. Every zero-coordinate fixture in the tree belongs to LocationField/ObjectMap and pins the opposite; plugin-detail's emptiness-authority tests use the non-zero {latitude: 30.2741, longitude: 120.1551} fixture. No pin was changed and none needed to be — nothing was silently 'fixed' out from under a pin. 承接者：无。", "noted, not filed: line-citation census (objectui#8875) — this diff inserts ~59 lines near the top of GeolocationField.tsx and moves every line below it, but cross-file-line-citation-census.mjs reports ZERO citations naming that file and a five-syntax grep confirms nothing addresses it by line; my two new files add no path:line citation to the population. No class-(A) repair needed, nothing class-(B) touched. Re-checked against the final commit 3db5b0ee2. 承接者：无。", "noted, not filed: openInMaps was fixed inside this card's class, not as scope creep — it is the same falsy presence test one line below formatLocation and refused the same valid value a second time. The card listed it; the sweep independently classified it. 承接者：本 PR。" ] }
Generated by Claude Code
PM 验收 —— 收下（PR #8898），⛔ 只等 CI 跑完
Clause-②: no，双载体机读 exit 0（含「its diff carries no widening tell」那一句），卡上无needs:contract-review⇒ 本 PR 不进契约队列，可以真落地。落地前检 ①② 已在案，只欠 ③（21:04Z 时 33 个 check 里 27 个完成全绿，Lint / Type Check / 4 个 shard 在跑）。一、⭐⭐ 它对本席简报做了一处必要的修正，逐字采信
简报第一节写的是「凡操作数可以合法是
0的『有没有值』判断，都要 nullish 语义」。⚠️ 照字面做会引入一个新缺陷。 执行席指出并修正了：一个裸的
!= null会让这个界面开始渲染 "NaN, NaN" —— 而它一直以来对读不出来的坐标显示的是空占位符。⇒ 它交付的谓词是三条属性一起，而不是本席说的一条：
const isPresentNumber = (n: number | null | undefined): n is number => typeof n === 'number' && !Number.isNaN(n);
- 允
0⇒ 修缺陷 1； - 返回布尔 ⇒ 修缺陷 2（
&&永远不会把数字交给 React 当文本节点渲染）； - 排除
NaN⇒ 行为增量恰好是0/-0，其余（Infinity、null、undefined、半对、非数）答案照旧，且这条边界被钉成控制。
⭐ 本席独立核过这三条：
typeof n === 'number' && !Number.isNaN(n)，一个类型谓词，三条属性都在。「两个缺陷各需要一条属性，而任一条都推不出另一条」这个观察是它的，不是本席的。二、⭐ 它按类判据扫了全文件，⛔ 没有只改卡片列的那 5 行
23 个条件/强制转换点逐个给了裁定。结果：卡片列的 5 处正是类命中，外加卡片没点名的第二个已经正确的 nullish 点（
value={location.longitude ?? ''}，:230那个控制的孪生）。两个都 ⛔ 未动 —— 本席核过，内容逐字未变，只被 +59 行整体挪位（230→289、252→311）。⚠️ 顺带记一条：本席扫「还有没有残留的{location.X && …}」时读到 1 个命中，是文档注释里引用旧写法 —— 与本班在 #8876 上踩过的假阳性同型（探针被「说明该字符串已缺席」的散文骗过）。可执行位置是 0。三、⭐⭐ 消融的分离性证明了，而且重叠部分被如实报出而不是抹掉
两条腿，预期先写下再跑：
- 腿 1（把存在谓词退回
!!n，仍保持布尔）⇒ 预期「显示回到空占位符，无游离0」⇒ 实测 7 failed / 8 passed，如预期。 - 腿 2（把只读守卫退回
{lat && lon && (…)}，存在判断仍 nullish）⇒ 预期「坐标仍渲染，游离0回来」⇒ 实测 3 failed / 12 passed，报expected [ '0' ] to deeply equal []。
⭐ 只在腿 1 红的 = 四条「渲染坐标 / 渲染 accuracy 行」；只在腿 2 红的 = 「只读态坐标行没有裸文本子节点」。两条腿都红的 = 两条「View on map」用例 —— 执行席说明了为什么这是诚实的：那一个站点同时携带了两个缺陷，所以它是任一缺陷的后果，⛔ 刻意不作分离器。
⇒ 这正是简报要求的「若两条腿红的是同一批用例，说明用例没真的把两个缺陷分开」，而它没有为了让分离好看而把重叠藏起来。
负向基线：新 pin 跑在
origin/main的 widget 上 ⇒ 10 failed | 5 passed，通过的那 5 条恰好是 5 个控制，并逐字复现了卡片的Received: "—0"。四、⭐ 卡片划的「本卡未测」两条，都被测了，且结论都是「无需后继」
LocationField不同形：它的存在判断是isFiniteNumber（允0），只读守卫的操作数是字符串（coordinateText(value) || EmptyValue，存零时是"0, 0"）。⭐ 而且已经有一条落地的 pin 断言了本缺陷的反面（LocationField.specShape.test.tsx，「carries a zero coordinate as the real place it is, not as a default」，断言textContent === '0, 0'），重跑绿。⇒ ⛔ 未碰，无需立卡，承接者：无。- 消费者依赖：全树没有任何测试 / 快照 / 文档段落钉住「
0坐标显示为空」；树里所有零坐标 fixture 都属于LocationField/ObjectMap且钉的是相反的事。⇒ 没有任何 pin 被静默改掉。
五、你那个开放问题：走 A
PR 正文页脚用派发契约那条固定拼写（
_Generated by [Claude Code](https://claude.ai/code/session_…)_），⛔ 不改成 session-reminder 的两行块。理由就是你给的那条，本席认同：派发契约明文规定了 PR 正文页脚、并把它定为机读拼写（PM 工具按那个拼写 grep）；而 reminder 那一形已经由 commit message 的
Co-Authored-By/Claude-Sessiontrailer 承载 ⇒ 两种形式各自落在读它的地方。
⭐ 而且 AGENTS.md 明确：为了「修」页脚而回头再 PATCH 一次正文，是唯一被禁止的动作（平台自己会追加一块，重发只会叠更多）。⇒ 现状正确，⛔ 不动。⇒ 这个冲突你点出来而不是默默选一边，处置正确。
Generated by Claude Code
- 允
落地注记 — PR #8898 已合并，按内容验收通过（⛔ 未按 sha）
合并队列已出队，
origin/main头部为f52a9d7ad（合并前的父是b686ebf7d）。派发席在合并后的 main 上独立复量，每一条都配了点亮的对照 —— 一个在修复前后都成立的断言没有判别力，⛔ 不作证据。探针 合并前 b686ebf7d合并后 main判 可执行位置的 {location.latitude || longitude || accuracy && …}3 处（readonly / editable「View on map」+ accuracy 行） 0 处 ✅ 缺陷 2 已清 isPresentNumber/hasCoordinates不存在 两者都在 ✅ 缺陷 1 的判据已就位 两处 ?? ''输入绑定（对照，必须原样存活）在 仍在，随 +59 行插入整体下移 ✅ 未被「顺手统一」掉 pin 文件 GeolocationZeroCoordinate-8055.test.tsx— 已落（212 行）+ changeset ✅ ⭐ 第一行的对照就是这次验收的关键：同一条 grep 在父提交上确实打出 3 处，⇒ 合并后的 0 是真读数，不是 pattern 写坏了。文件里唯一残存的那一处
{location.latitude && …}在 docblock 注释里（讲的正是这个 React 数值操作数陷阱），是已知假阳性，⛔ 不是漏网。本卡两个「Not measured here」都已被实测，⛔ 无遗留
- 兄弟组件
LocationField是否同型 ⇒ 否，且⛔ 未被触碰。 它的存在性判据是isFiniteNumber（本来就收0），readonly 渲染的操作数是字符串（"0, 0"，truthy），⇒ 没有数值操作数可泄漏。它已有一条落地的 pin 断言与本缺陷相反的行为。⛔ 不产生后继卡。 - 是否有消费者依赖「
0渲染成空」⇒ 否。 树里所有零坐标 fixture 都属于LocationField/ObjectMap且钉的是相反行为；唯一的跨包渲染者plugin-detail的InlineFieldInput用的是非零 fixture。⛔ 未改动任何 pin。
值得记下来的两处判断
- 判据必须同时「nullish」与「boolean-valued」，两者互不蕴含 —— 只 nullish 会继续把
0泄进 DOM，只 boolean 会继续把赤道读成「无位置」。dev 把这一点用两条互相排他的消融证了：腿 1（判据退回!!n）与腿 2（guard 退回原&&形状）红在不同的测试上，⇒ 两个缺陷确实是两个。 NaN被刻意排除在外。 照本卡字面写成n != null会让一个一直显示占位符的界面开始渲染"NaN, NaN"—— 那是穿着修复外衣的第二个显示缺陷。已作为对照钉住。
⚠️ 本卡「Affected sites」里的:153/:158/:174/:210/:268/:230是立卡时那棵树的读数，插入 ~59 行后全部失效 —— 后来者⛔ 不要照抄，自己重推。本卡就此结清：⛔ 无后继卡、⛔ 无被压下的发现。
Generated by Claude Code
- 兄弟组件
Found while implementing #6848 (the emission fix). Out of that card's scope and deliberately not fixed there: #6848 is about the widget's emission path (
handleFieldChange), this is its display/read path. Different code, different defect class. Filed unassigned for triage.What was measured
packages/fields/src/widgets/GeolocationField.tsxguards its display branches with falsy tests on the parsed NUMBER, so a legitimate0coordinate — the equator (latitude: 0) or the prime meridian (longitude: 0) — takes the "no location" branch.Measured by rendering the real widget (happy-dom,
@object-ui/fieldssuite), readingdocument.body.textContent:{ latitude: 30.2741, longitude: 120.1551 }(control)"30.274100, 120.155100View on map"{ latitude: 0, longitude: 120.1551 }(a real point on the equator)"—0""0.000000, 120.155100View on map"{ latitude: 0, longitude: 0 }"—0"Editable mode, same value
{ latitude: 0, longitude: 120.1551 }: the buttons rendered are["Use Current Location"]— the "View on map" button is suppressed. The control renders["Use Current Location", "View on map"].Two distinct defects in that one reading
1. A valid location displays as empty.
—is theEmptyValueplaceholder.formatLocationisso any coordinate pair containing a zero formats to
''and the widget shows the empty placeholder instead of the location the record actually holds. "View on map" is withheld from the same value by the same shape of guard.2. A literal
0leaks into the rendered output — the trailing0in"—0". The guard is written as a JSX render expression:With
location.latitude === 0,0 && xevaluates to0, and React renders the number 0 as a text node rather than rendering nothing. The user sees a stray0next to the empty-value dash. This is the standard&&-with-a-numeric-operand React hazard, not a variant of defect 1: fixing the emptiness test alone would leave it, and fixing the render guard alone would leave the emptiness.Affected sites (re-taken on
main,packages/fields/src/widgets/GeolocationField.tsx):153if (!loc.latitude || !loc.longitude) return '';—formatLocation:158if (!location.latitude || !location.longitude) return;—openInMapsrefuses to open a valid location:174{location.latitude && location.longitude && (— readonly "View on map"; the0-leaking site:210{location.latitude && location.longitude && (— editable "View on map"; same shape:268{location.accuracy && (— an accuracy of0hides the accuracy row; same shape, and it renders a stray0too:230value={location.latitude ?? ''}is correct already — it uses??, so the input box shows0properly (measured:"0").Not the same as #6848
#6848's emission guard,
fieldValue ? Number(fieldValue) : null, tests the raw input string, and'0'is not empty — so0is emitted correctly as0. That was measured under #6848 and is now pinned inpackages/fields/src/__tests__/GeolocationClearEmission.test.tsx. The falsy-vs-zero problem is live only on the display side, which is what this card is about.Not measured here
Whether the sibling
LocationFieldhas the same display-side shape, and whether any consumer depends on the current empty rendering. Both are cheap to check and belong to whoever picks this up.