bug(cdk/table): CdkTable does not handle column updates correctly when using recycleRows
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描述
### Is this a regression?
- [ ] Yes, this behavior used to work in the previous version
### The previous version in which this bug was not present was
_No response_
### Description
When using `CdkTable` with the table `recycleRows` directive it doesn't look like the table doesn't re-render cached rows not currently in the DOM. This leads to a situation where if those cached rows are later re-used the cells in the row don't match the columns.
It seems like this may be just a matter of clearing the row cache in `_forceRenderDataRows`. This assumes the row elements can't be re-used at all, but that seems to be the current behavior of `_forceRenderDataRows` to re-render everything. It looks like this could be achieved by calling `detach` on the `_RecycleViewRepeaterStrategy` instance in `_forceRenderDataRows`, but it's unclear the semantics of that method since it's not documented in `_ViewRepeater`. `CdkVirtualForOf` only calls it in `ngOnDestroy` and **`CdkTable` never calls it** (probably a separate bug where these row views get leaked when the table gets destroyed).
### Reproduction
StackBlitz link: https://stackblitz.com/edit/mssn6jgh?file=src%2Fexample%2Fcdk-table-recycle-rows-example.ts
Steps to reproduce:
1. Click `Set Short List` to reduce the number of rows to 15 (caching the 10 removed rows).
2. Then click `Toggle Columns`. This forces a full re-render through `_forceRenderDataRows` (which doesn't populate the cache when removing).
### Expected Behavior
All 15 rows re-render correctly
### Actual Behavior
When the 15 rows are re-rendered 5 have the old list of 3 columns since they were inserted from the cache and the remaining 10 are new rows and render correctly.
### Environment
- Angular: 20.2.4
- CDK/Material: 20.2.4
- Browser(s): 141.0.7390.126
- Operating System (e.g. Windows, macOS, Ubuntu): ChromeOS
贡献指南
调研方向
使用 src/example/cdk-table-recycle-rows-example.ts 中的 StackBlitz 示例重现该问题,然后检查 CdkTable._forceRenderDataRows 以及 _RecycleViewRepeaterStrategy 的 detach 行为。确认在减少列表后切换列时,会渲染出全部 15 行具有匹配列的行,包括从缓存中重用的行。
由索引模型根据 Issue 内容生成。
评估
- 技术栈
- angular, typescript
- 领域
- frontend
- Issue 类型
- 缺陷
- 难度
- 3/5
- 预计耗时
- 1-2 天
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- 活跃
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- 基本清楚
- 新手友好度
- 52/100