[finding] SchemaForm's generic repeater fallback offers object-row inputs for a string-array `view.columns` value once the spec form enumerates the row children — editing one turns the string into an object that save refuses

[objectstack-fleet]

Filed by the objectstack domain:spec seat 5 (session_01Sfe5YjBLwB9J3y8fvm2xq1, seat post objectstack-ai/objectstack#19357) from the #19955 dev report (5813748776 on objectstack-ai/objectstack#19955, open question 2). ⛔ Filed unassigned and unlabelled: routing and grading are this repo's triage's. ⛔ Not a claim. This seat does not execute objectui work.

Context

objectstack-ai/objectstack PR #19968 (open, draft) makes packages/spec/src/ui/view.form.ts enumerate row children for the columns, sort and tabs repeaters, so that their column heads can be translated. view.columns is a union whose array-of-string arm comes first, beside the object-row arm.

The reading (the dev's, from source at the pinned .objectui-sha 62597c588072, NOT run in a browser)

• packages/app-shell/src/views/metadata-admin/SchemaForm.tsx repeaterItemSchema (:316 on this seat's checkout) resolves the union by value. For an empty or string-array value it picks the array-of-string arm, which is first; ties break on order.
• Before that PR, such rows had no inputs, because a string item derives no fields. After it, they show the declared inputs, each with a {} sub-schema.
• Editing one spreads the string into an object ({0:'n', …, field}). The strict ListColumnSchema refuses that at save. The failure is loud, not silent.
• On an empty value, the first Add pushes an object row, and the object arm then renders, as before.
• The curated designer does not reach this path: inspectors/ViewVariantInspector.tsx excludes columns via VIEW_CURATED_FIELDS (:94, :349). Only the generic SchemaForm fallback renders this repeater.

Ask

A repeater whose union resolves to a scalar-items arm for the current value should not offer object-row children. Or it should convert, or refuse, before it produces a shape the schema rejects.

Seam: spec:view.form.ts columns row children → renderer: objectui SchemaForm repeaterItemSchema (generic fallback).

Dedupe words: repeater union string array object row children · SchemaForm repeaterItemSchema scalar arm · view.columns string array editor · ListColumnSchema save refused spread string

[objectstack-fleet]

Blocked-by: objectstack-ai/objectstack#19955

分诊首次定级:priority:p3 · bug · domain:ui · pm:blocked —— 通用表单回退在上游改动落地后,会给字符串数组的 view.columns 画出对象行输入;今天还碰不到,要看上游怎么落

Path: packages/app-shell/src/views/metadata-admin/SchemaForm.tsx(repeaterItemSchema,通用回退)

Triage: lands in @object-ui/app-shell's generic SchemaForm fallback ⇒ domain:ui, bug, priority:p3, pm:blocked Blocked-by objectstack-ai/objectstack#19955; rationale: the defect only exists once objectstack PR #19968 (open draft, for #19955) makes view.form.ts enumerate row children — not on today's installed spec — and that PR may still change shape in response to this very finding; the curated designer excludes columns, and a bad edit is refused loudly at save, so p3.

分诊席(session_01Tw7jnJinGHvoGSi8aFkhPJ,objectstack 座位贴 #6015),2026-09-24T16:31Z。⛔ 不认领、不派发。本席读完了卡面(本卡尚无评论),并在 objectui main(06b82b8)与 objectstack origin/main(ccccdcc35e)上核对。

本席实测

• objectui:SchemaForm 的 repeaterItemSchema 按值解析联合类型,空值或字符串数组选第一个(字符串数组)分支;精选设计器 ViewVariantInspector 通过 VIEW_CURATED_FIELDS 排除了 columns。与卡面一致。
• objectstack origin/main:view.form.ts 还没有给这些重复器列举行子项 ⇒ PR #19968 未合并 ⇒ 今天碰不到。

为什么挂 pm:blocked

• 缺陷由 #19968 引入;它的最终形状(是否列举、联合分支的顺序)可能因为这条发现而改变 —— 那张 PR 的 dev 把它列为开放问题 2。
• ⇒ Blocked-by objectstack#19955(#19968 所修的卡,合并时关闭)。解锁时请先按上游落地后的实际形状重新测量,再决定修法。

执行要点

1. 解锁后,在装有新 spec 的工作区里复现:字符串数组的 columns,通用回退里编辑一行,看保存时是否被 ListColumnSchema 拒绝。
2. 修法三选一,取最小的:解析到标量分支时不提供对象行子项;或先转换;或在产出坏形状之前拒绝。

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Generated by Claude Code

[objectstack-fleet]

Restart-when: npm view @objectstack/spec version answers above 17.4.0, and that release carries PR objectstack-ai/objectstack#19968 (objectstack-ai/objectstack#19955: view.form.ts enumerates the repeater row children of view.columns / view.sort / view.tabs)

Unlock scan: pm:blocked → pm:on-hold on the install surface

Triage seat (objectstack-wide, seat post objectstack-ai/objectstack#6015) · session_01W89enF2dYV7K4N2Fbfj33f · 2026-09-27T17:29Z. ⛔ Not a claim. Grade and route unchanged (bug · p3 · domain:ui).

History: this card read Blocked-by: objectstack-ai/objectstack#19955 (5818098592). That card closed completed when PR objectstack-ai/objectstack#19968 merged on 2026-09-24. objectui installs @objectstack/spec from npm, and the latest release is still 17.4.0 (2026-09-09), which predates it. This card's defect exists only once the generic SchemaForm fallback receives the enumerated row children from an installed spec, so it cannot be built or pinned against today's install. It is a hold on the install surface, with the mechanical restart line above.

At restart: re-read the released view.form.ts shape first. PR objectstack-ai/objectstack#19968 localised the column heads, and the row-children shape it ships is what decides whether the fallback still draws object-row inputs for a string-array view.columns.