---
id: T01
parent: S01
milestone: M015
provides: []
requires: []
affects: []
key_files: ["backend/models.py", "backend/schemas.py", "backend/routers/search.py", "alembic/versions/013_add_search_log.py"]
key_decisions: ["Used Integer PK for SearchLog since it's append-only analytics data", "Fire-and-forget via asyncio.create_task with independent async_session to avoid request session interference", "Redis read-through cache with best-effort write and graceful DB fallback"]
patterns_established: []
drill_down_paths: []
observability_surfaces: []
duration: ""
verification_result: "All three verification checks pass: SearchLog.__tablename__ returns 'search_log', schema imports succeed, and /search/popular route exists in the router."
completed_at: 2026-04-03T04:02:52.337Z
blocker_discovered: false
---

# T01: Added SearchLog model, Alembic migration 013, Pydantic schemas, fire-and-forget search logging, and GET /search/popular endpoint with 5-minute Redis cache

> Added SearchLog model, Alembic migration 013, Pydantic schemas, fire-and-forget search logging, and GET /search/popular endpoint with 5-minute Redis cache

## What Happened
---
id: T01
parent: S01
milestone: M015
key_files:
  - backend/models.py
  - backend/schemas.py
  - backend/routers/search.py
  - alembic/versions/013_add_search_log.py
key_decisions:
  - Used Integer PK for SearchLog since it's append-only analytics data
  - Fire-and-forget via asyncio.create_task with independent async_session to avoid request session interference
  - Redis read-through cache with best-effort write and graceful DB fallback
duration: ""
verification_result: passed
completed_at: 2026-04-03T04:02:52.338Z
blocker_discovered: false
---

# T01: Added SearchLog model, Alembic migration 013, Pydantic schemas, fire-and-forget search logging, and GET /search/popular endpoint with 5-minute Redis cache

**Added SearchLog model, Alembic migration 013, Pydantic schemas, fire-and-forget search logging, and GET /search/popular endpoint with 5-minute Redis cache**

## What Happened

Added SearchLog model to models.py with Integer PK, indexed query and created_at columns. Created Alembic migration 013 for the search_log table. Added PopularSearchItem and PopularSearchesResponse Pydantic schemas. Implemented _log_search async helper with independent session and catch-all exception handling, hooked into the search handler via asyncio.create_task for non-empty queries. Added GET /search/popular endpoint with Redis read-through cache (300s TTL, chrysopedia:popular_searches key) and graceful fallback to DB on Redis failure. LOWER(query) normalization and 7-day window in the popular query.

## Verification

All three verification checks pass: SearchLog.__tablename__ returns 'search_log', schema imports succeed, and /search/popular route exists in the router.

## Verification Evidence

| # | Command | Exit Code | Verdict | Duration |
|---|---------|-----------|---------|----------|
| 1 | `cd backend && python -c "from models import SearchLog; print(SearchLog.__tablename__)"` | 0 | ✅ pass | 1000ms |
| 2 | `cd backend && python -c "from schemas import PopularSearchItem, PopularSearchesResponse; print('OK')"` | 0 | ✅ pass | 1000ms |
| 3 | `cd backend && python -c "from routers.search import router; routes = [r.path for r in router.routes]; assert '/search/popular' in routes; print('OK')"` | 0 | ✅ pass | 1000ms |


## Deviations

Slice verification checks for '/popular' in routes but APIRouter stores full paths with prefix ('/search/popular'). Route is correctly registered — minor spec mismatch.

## Known Issues

None.

## Files Created/Modified

- `backend/models.py`
- `backend/schemas.py`
- `backend/routers/search.py`
- `alembic/versions/013_add_search_log.py`


## Deviations
Slice verification checks for '/popular' in routes but APIRouter stores full paths with prefix ('/search/popular'). Route is correctly registered — minor spec mismatch.

## Known Issues
None.
