90 lines
2.7 KiB
Markdown
90 lines
2.7 KiB
Markdown
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# Bug: 追问1次后无法进入查看历史记录
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日期：2026-04-08
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状态：已确认（未修复）
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## 问题描述
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追问1次之后追问入口关闭，但用户也没法点击进去查看追问的历史记录。
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## 根因分析
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`_loadFollowUpEligibility()` 方法（`divination_result_screen.dart:65-83`）将两个概念混为一谈：
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```dart
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Future<void> _loadFollowUpEligibility() async {
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...
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final messages = await widget.divinationApi!.getSessionMessages(
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threadId: widget.data.threadId!,
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);
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final userCount = messages.where((msg) => msg.role == 'user').length;
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...
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setState(() {
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_canFollowUp = userCount < 2; // 同时控制"能追问"和"能进入"
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...
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});
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}
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```
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按钮逻辑（`divination_result_screen.dart:367`）：
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```dart
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onPressed: (!_canFollowUp || _followUpEligibilityLoading)
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? null // _canFollowUp = false 时按钮完全禁用
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: () {
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Navigator.of(context).push(
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MaterialPageRoute<void>(
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builder: (_) => FollowUpChatScreen(...),
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),
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);
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},
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```
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**问题**：
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- `_canFollowUp = userCount < 2` 控制的是"是否还有追问配额"
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- 但 `onPressed` 把它和"是否能进入查看历史"混用了
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- 导致用户追问1次后（userCount=2），`_canFollowUp=false`，按钮被禁用
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- 用户**无法进入追问页面查看历史记录**
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**业务逻辑分析**：
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- 每 session 最多2次追问（首问1次 + 追问1次）
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- 追问1次后，用户不能再发送新追问
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- 但**应该仍能进入查看历史记录**
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### 正确的逻辑应该是
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```dart
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// 追问配额判断
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_canFollowUp = userCount < 2;
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// 能否进入查看历史（与追问次数无关，只要有历史消息就能进入）
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_canEnterFollowUpChat = messages.isNotEmpty; // 或者只要有 threadId 就能进
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// 按钮文案
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buttonText = _canFollowUp ? l10n.followUpEntryHint : l10n.followUpViewHistory;
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// 按钮是否禁用
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onPressed = (_followUpEligibilityLoading)
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? null // 只在加载中时禁用
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: () { ... } // 始终可点击进入查看
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```
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## 证据
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- 结果页代码：`apps/lib/features/divination/presentation/screens/divination_result_screen.dart`
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- `_buildFollowUpBar`: 行 338-394
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- `_loadFollowUpEligibility`: 行 65-83
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- 按钮 onPress: 行 367
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- 追问聊天页：`apps/lib/features/divination/presentation/screens/follow_up_chat_screen.dart`
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## 修复方向
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1. 分离"能否追问"和"能否进入查看历史"的逻辑
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2. 按钮文案根据状态显示不同内容（能追问显示追问提示，已用完显示"查看历史"）
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3. 只要有 `threadId`，用户就应该能进入查看历史
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---
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## 相关文档
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- 随访工程计划：`docs/plans/2026-04-08-followup-session-history-eng-plan.md`
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