13e91e628d
Redirect /teacher/exams/grading* to /teacher/homework/submissions; remove exam grading UI/actions/data-access; add homework student workflow and update design docs.
154 lines
6.7 KiB
Markdown
154 lines
6.7 KiB
Markdown
# 作业模块实现设计文档（Homework Module）
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**日期**: 2025-12-31
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**模块**: Homework (`src/modules/homework`)
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---
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## 1. 概述
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作业模块提供“由试卷派发作业”的完整生命周期：
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- 教师从已存在的 Exam 派发 Homework Assignment（冻结当时的结构与题目引用）
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- 指定作业目标学生（Targets）
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- 学生开始一次作答（Submission），保存答案（Answers），并最终提交
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- 教师在提交列表中查看并批改（按题给分/反馈，汇总总分）
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核心目标是：在不破坏 Exam 本体数据的前提下，为作业提供可追溯、可批改、可统计的独立域模型。
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**说明（合并调整）**：教师端“阅卷/批改”统一通过 Homework submissions 完成，`/teacher/exams/grading*` 相关路由已重定向到 `/teacher/homework/submissions`。
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---
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## 2. 数据架构
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### 2.1 核心实体
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- `homework_assignments`: 作业实例（从 exam 派生）
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- `homework_assignment_questions`: 作业与题目关系（score/order）
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- `homework_assignment_targets`: 作业目标学生列表
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- `homework_submissions`: 学生作业尝试（attempt_no/status/时间/是否迟交）
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- `homework_answers`: 每题答案（answer_content/score/feedback）
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数据库变更记录见：[schema-changelog.md](file:///c:/Users/xiner/Desktop/CICD/docs/db/schema-changelog.md#L34-L77)
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### 2.2 设计要点：冻结 Exam → Homework Assignment
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- `homework_assignments.source_exam_id` 保存来源 Exam
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- `homework_assignments.structure` 在 publish 时复制 `exams.structure`（冻结当时的呈现结构）
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- 题目关联使用 `homework_assignment_questions`（仍引用 `questions` 表，作业侧记录分值与顺序）
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---
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## 3. 路由与页面
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### 3.1 教师端
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- `/teacher/homework/assignments`: 作业列表
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实现：[assignments/page.tsx](file:///c:/Users/xiner/Desktop/CICD/src/app/(dashboard)/teacher/homework/assignments/page.tsx)
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- `/teacher/homework/assignments/create`: 从 Exam 派发作业
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实现：[create/page.tsx](file:///c:/Users/xiner/Desktop/CICD/src/app/(dashboard)/teacher/homework/assignments/create/page.tsx)
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- `/teacher/homework/assignments/[id]`: 作业详情
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实现：[[id]/page.tsx](file:///c:/Users/xiner/Desktop/CICD/src/app/(dashboard)/teacher/homework/assignments/%5Bid%5D/page.tsx)
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- `/teacher/homework/assignments/[id]/submissions`: 作业提交列表（按作业筛选）
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实现：[[id]/submissions/page.tsx](file:///c:/Users/xiner/Desktop/CICD/src/app/(dashboard)/teacher/homework/assignments/%5Bid%5D/submissions/page.tsx)
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- `/teacher/homework/submissions`: 全部提交列表
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实现：[submissions/page.tsx](file:///c:/Users/xiner/Desktop/CICD/src/app/(dashboard)/teacher/homework/submissions/page.tsx)
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- `/teacher/homework/submissions/[submissionId]`: 批改页
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实现：[[submissionId]/page.tsx](file:///c:/Users/xiner/Desktop/CICD/src/app/(dashboard)/teacher/homework/submissions/%5BsubmissionId%5D/page.tsx)
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关联重定向：
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- `/teacher/exams/grading` → `/teacher/homework/submissions`
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实现：[grading/page.tsx](file:///c:/Users/xiner/Desktop/CICD/src/app/(dashboard)/teacher/exams/grading/page.tsx)
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- `/teacher/exams/grading/[submissionId]` → `/teacher/homework/submissions`
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实现：[grading/[submissionId]/page.tsx](file:///c:/Users/xiner/Desktop/CICD/src/app/(dashboard)/teacher/exams/grading/%5BsubmissionId%5D/page.tsx)
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### 3.2 学生端
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- `/student/learning/assignments`: 作业列表
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实现：[page.tsx](file:///c:/Users/xiner/Desktop/CICD/src/app/(dashboard)/student/learning/assignments/page.tsx)
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- `/student/learning/assignments/[assignmentId]`: 作答页（开始/保存/提交）
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实现：[[assignmentId]/page.tsx](file:///c:/Users/xiner/Desktop/CICD/src/app/(dashboard)/student/learning/assignments/%5BassignmentId%5D/page.tsx)
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---
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## 4. 数据访问层（Data Access）
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数据访问位于：[data-access.ts](file:///c:/Users/xiner/Desktop/CICD/src/modules/homework/data-access.ts)
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### 4.1 教师侧查询
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- `getHomeworkAssignments`：作业列表（可按 creatorId/ids）
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- `getHomeworkAssignmentById`：作业详情（含目标人数、提交数统计）
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- `getHomeworkSubmissions`：提交列表（可按 assignmentId）
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- `getHomeworkSubmissionDetails`：提交详情（题目内容 + 学生答案 + 分值/顺序）
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### 4.2 学生侧查询
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- `getStudentHomeworkAssignments(studentId)`：只返回“已派发给该学生、已发布、且到达 availableAt”的作业
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- `getStudentHomeworkTakeData(assignmentId, studentId)`：进入作答页所需数据（assignment + 当前/最近 submission + 题目列表 + 已保存答案）
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### 4.3 开发模式用户选择（Demo）
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为了在未接入真实 Auth 的情况下可演示学生端页面，提供：
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- `getDemoStudentUser()`：优先选取最早创建的 student；若无 student，则退化到任意用户
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---
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## 5. Server Actions
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实现位于：[actions.ts](file:///c:/Users/xiner/Desktop/CICD/src/modules/homework/actions.ts)
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### 5.1 教师侧
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- `createHomeworkAssignmentAction`：从 exam 创建 assignment；可写入 targets；可选择 publish（默认 true）
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- `gradeHomeworkSubmissionAction`：按题写入 score/feedback，并汇总写入 submission.score 与 status=graded
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### 5.2 学生侧
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- `startHomeworkSubmissionAction`：创建一次 submission（attemptNo + startedAt），并校验：
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- assignment 已发布
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- student 在 targets 中
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- availableAt 已到
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- 未超过 maxAttempts
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- `saveHomeworkAnswerAction`：保存/更新某题答案（upsert 到 homework_answers）
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- `submitHomeworkAction`：提交作业（校验 dueAt/lateDueAt/allowLate，写入 submittedAt/isLate/status=submitted）
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---
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## 6. UI 组件
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### 6.1 教师批改视图
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- [HomeworkGradingView](file:///c:/Users/xiner/Desktop/CICD/src/modules/homework/components/homework-grading-view.tsx)
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- 左侧：学生答案只读展示
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- 右侧：按题录入分数与反馈，并提交批改
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### 6.2 学生作答视图
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- [HomeworkTakeView](file:///c:/Users/xiner/Desktop/CICD/src/modules/homework/components/homework-take-view.tsx)
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- Start：开始一次作答
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- Save：按题保存
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- Submit：提交（提交前会先保存当前题目答案）
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- 题型支持：`text` / `judgment` / `single_choice` / `multiple_choice`
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题目 content 约定与题库一致：`{ text, options?: [{ id, text, isCorrect? }] }`（作答页仅消费 `id/text`）。
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---
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## 7. 类型定义
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类型位于：[types.ts](file:///c:/Users/xiner/Desktop/CICD/src/modules/homework/types.ts)
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- 教师侧：`HomeworkAssignmentListItem` / `HomeworkSubmissionDetails` 等
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- 学生侧：`StudentHomeworkAssignmentListItem` / `StudentHomeworkTakeData` 等
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---
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## 8. 校验
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- `npm run typecheck`: 通过
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- `npm run lint`: 0 errors（仓库其他位置存在 warnings，与本模块新增功能无直接关联）
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