---
id: S03
parent: M019
milestone: M019
provides:
  - VideoConsent and ConsentAuditLog models
  - Consent API router with 5 endpoints at /api/v1/consent/*
  - Ownership verification helper _verify_video_ownership()
  - Consent Pydantic schemas (VideoConsentUpdate, VideoConsentRead, etc.)
  - 22 integration tests for consent endpoints
requires:
  []
affects:
  - S05
  - S06
key_files:
  - backend/models.py
  - backend/routers/consent.py
  - backend/schemas.py
  - backend/main.py
  - alembic/versions/017_add_consent_tables.py
  - backend/tests/test_consent.py
  - backend/tests/conftest.py
key_decisions:
  - Used RESTRICT on updated_by/changed_by FK to prevent orphaning consent audit history
  - ConsentField enum for application-level validation, not DB column type
  - GET single video returns defaults when no consent record exists (rather than 404)
  - Each changed field gets its own audit entry with incrementing version
  - Fixtures create creator/user linkage via direct DB UPDATE after API registration
patterns_established:
  - Ownership verification helper with admin bypass pattern for multi-tenant endpoints
  - Per-field audit logging with incrementing version numbers for consent changes
  - Creator+video fixture pattern for consent-related integration tests
observability_surfaces:
  - chrysopedia.consent logger on PUT with video_id and fields_changed
drill_down_paths:
  - .gsd/milestones/M019/slices/S03/tasks/T01-SUMMARY.md
  - .gsd/milestones/M019/slices/S03/tasks/T02-SUMMARY.md
  - .gsd/milestones/M019/slices/S03/tasks/T03-SUMMARY.md
duration: ""
verification_result: passed
completed_at: 2026-04-03T22:18:33.593Z
blocker_discovered: false
---

# S03: [A] Consent Data Model + API Endpoints

**Consent data model, 5 API endpoints with ownership verification and versioned audit trail, and 22 integration tests — all verified at import/collection level (DB integration tests require ub01 PostgreSQL).**

## What Happened

Three tasks delivered the full consent subsystem:

**T01 — Data Model:** Added `VideoConsent` (mutable per-video consent state with unique constraint on `source_video_id`), `ConsentAuditLog` (append-only versioned change history per field), and `ConsentField` enum to `backend/models.py`. Created Alembic migration `017_add_consent_tables.py` with proper FKs and RESTRICT delete behavior on user references.

**T02 — API Router:** Built `backend/routers/consent.py` with 5 endpoints: `GET /consent/videos` (paginated list for creator), `GET /consent/videos/{video_id}` (single with defaults when no record exists), `PUT /consent/videos/{video_id}` (upsert with per-field audit entries and incrementing version numbers), `GET /consent/videos/{video_id}/history` (audit trail), and `GET /consent/admin/summary` (admin-only aggregate counts). Ownership verification via `_verify_video_ownership()` with admin bypass. Added Pydantic schemas for partial update, read, audit entry, list response, and summary. Router registered in `main.py`.

**T03 — Integration Tests:** 22 async test functions in `backend/tests/test_consent.py` covering: unauthenticated access (401), missing creator_id (403), wrong creator ownership (403), nonexistent video (404), PUT creating consent + audit entries, GET list with pagination, GET single with defaults, audit trail ordering, idempotent PUT (no duplicate audit entries), partial update, admin read bypass, admin summary endpoint, and non-admin summary rejection. New conftest fixtures: `creator_with_videos`, `creator_user_auth`, `admin_auth`.

**Verification note:** All tests collect successfully (22/22). Full DB integration execution requires the PostgreSQL instance on ub01:5433 — same infrastructure constraint as all existing test files in the project.

## Verification

1. `cd backend && python -c "from models import VideoConsent, ConsentAuditLog, ConsentField; print('OK')"` → OK
2. `cd backend && python -c "from routers.consent import router; print(f'{len(router.routes)} routes OK')"` → 5 routes OK
3. `python -c "import importlib.util; spec = importlib.util.spec_from_file_location('m', 'alembic/versions/017_add_consent_tables.py'); mod = importlib.util.module_from_spec(spec)"` → valid Python
4. `cd backend && python -c "from schemas import VideoConsentUpdate, VideoConsentRead, ConsentAuditEntry, ConsentListResponse, ConsentSummary; print('OK')"` → OK
5. `cd backend && python -m pytest tests/test_consent.py --collect-only` → 22 tests collected
6. `cd backend && python -m pytest tests/ --collect-only` → 107 tests collected, 0 errors (no regressions)

## Requirements Advanced

None.

## Requirements Validated

None.

## New Requirements Surfaced

None.

## Requirements Invalidated or Re-scoped

None.

## Deviations

None. All three tasks delivered as planned.

## Known Limitations

Integration tests require PostgreSQL on ub01:5433 — cannot run locally. This is a pre-existing infrastructure constraint, not new to this slice.

## Follow-ups

Run `alembic upgrade head` on ub01 to apply migration 017. Run `cd backend && python -m pytest tests/test_consent.py -v` against ub01 DB to get full integration test pass.

## Files Created/Modified

- `backend/models.py` — Added VideoConsent, ConsentAuditLog models and ConsentField enum
- `alembic/versions/017_add_consent_tables.py` — New migration creating video_consents and consent_audit_log tables
- `backend/schemas.py` — Added consent Pydantic schemas (VideoConsentUpdate, VideoConsentRead, ConsentAuditEntry, ConsentListResponse, ConsentSummary)
- `backend/routers/consent.py` — New consent router with 5 endpoints and ownership verification
- `backend/main.py` — Registered consent router at /api/v1
- `backend/tests/test_consent.py` — 22 integration tests for consent endpoints
- `backend/tests/conftest.py` — Added creator_with_videos, creator_user_auth, admin_auth fixtures
