Add survey-assignment linking, group mentors, and analytics

[jon-bell]

Summary

This PR adds comprehensive survey management features including linking surveys to assignments, assigning mentors to student groups, and providing analytics views for survey responses across groups.

Key Changes

Survey-Assignment Linking

• Added assignment_id and available_at columns to surveys table
• Surveys can now be optionally linked to assignments, making them visible on submission pages
• available_at field controls when surveys become visible to students
• Updated RLS policies to respect available_at timestamp

Group Mentor Assignment

• Added mentor_profile_id column to assignment_groups table
• Instructors can now assign mentors to student groups via the groups management page
• New bulk grading mode "by_group_mentors" automatically assigns submissions to their group's mentor
• Includes validation for submissions without groups or mentors

Survey Analytics & Status Tracking

• New SurveyAnalytics component displays statistical analysis of survey responses
• Supports filtering by numeric questions (rating, nouislider, text types)
• Shows statistics (mean, median, min, max, count) broken down by group and overall
• New SurveyStatusBanner component displays survey completion status on assignment submission pages
• Students can see pending, completed, or overdue survey status with quick links

Database Functions

• get_survey_status_for_assignment(): Returns survey completion status for a student on a specific assignment
• get_survey_responses_with_group_context(): Aggregates survey responses with group and mentor information for analytics

UI Enhancements

• Survey creation/editing forms now include assignment linking and available_at date picker
• Groups management page includes mentor assignment dropdown
• Survey responses view integrates analytics component
• Bulk grading interface supports new "Assign to group mentors" mode

Implementation Details

• Proper RLS policies ensure only instructors/graders can access analytics
• Mentor assignment respects existing grading conflict checks
• Survey availability is controlled by both publication status and available_at timestamp
• Group mentor assignments are preserved when copying groups between assignments

https://claude.ai/code/session_01C4xcTvQXMFsm7A3osxUwMF

[coderabbitai]

Warning

Rate limit exceeded

@jon-bell has exceeded the limit for the number of commits that can be reviewed per hour. Please wait 1 minutes and 10 seconds before requesting another review.

⌛ How to resolve this issue?

After the wait time has elapsed, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

We recommend that you space out your commits to avoid hitting the rate limit.

🚦 How do rate limits work?

CodeRabbit enforces hourly rate limits for each developer per organization.

Our paid plans have higher rate limits than the trial, open-source and free plans. In all cases, we re-allow further reviews after a brief timeout.

Please see our FAQ for further information.

📥 Commits

Reviewing files that changed from the base of the PR and between 14a4890 and e3d7b89.

📒 Files selected for processing (13)

• app/course/[course_id]/assignments/[assignment_id]/submissions/layout.tsx
• app/course/[course_id]/manage/assignments/[assignment_id]/groups/page.tsx
• app/course/[course_id]/manage/assignments/[assignment_id]/reviews/bulk-assign/page.tsx
• app/course/[course_id]/manage/surveys/SurveysTable.tsx
• app/course/[course_id]/manage/surveys/[survey_id]/edit/page.tsx
• app/course/[course_id]/manage/surveys/[survey_id]/responses/SurveyResponsesView.tsx
• app/course/[course_id]/manage/surveys/new/form.tsx
• app/course/[course_id]/manage/surveys/new/page.tsx
• components/survey/SurveyAnalytics.tsx
• components/ui/survey-status-banner.tsx
• supabase/functions/assignment-group-copy-groups-from-assignment/index.ts
• supabase/migrations/20260222000000_survey_assignment_grading.sql
• utils/supabase/SupabaseTypes.d.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch claude/survey-assignment-grading-bggg1

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}