gendesign/backend/app/api
lekss361 c39b53cf53
fix(site-finder): cascade InFailedSqlTransaction — velocity internal rollback (#155)
* fix(site-finder): db.rollback() в velocity catches + SAVEPOINT zoning/success_rec

velocity.py 3 internal try/except возвращали None БЕЗ db.rollback(). PR #154
SAVEPOINT не помог — exception не propagates из velocity. Postgres tx
aborted внутри, cascade InFailedSqlTransaction на следующих queries.

Fix:
- velocity.py: db.rollback() в 3 catch блоках
- parcels.py: SAVEPOINT обёртки для zoning + success_recommendation

Refs: user reports 2026-05-15 cascade 500

* fix(velocity): SAVEPOINT per query (not db.rollback) — correct SQLAlchemy 2.0 pattern

Per PR #155 bot review — мой db.rollback() в catches был НЕПРАВИЛЬНЫЙ.

Session.rollback() = ENTIRE outer tx (не savepoint). Outer SAVEPOINT context
становится orphaned → InvalidRequestError на __exit__.

Correct fix: wrap каждый db.execute в свой with db.begin_nested():
- Failure → __exit__ propagates exception → SAVEPOINT rolls back
- Outer tx остаётся clean
- velocity returns None gracefully → caller продолжает

Все 3 SQL queries в velocity.py теперь SAVEPOINT-wrapped:
- compute_velocity: competitor_query
- compute_velocity: sales_rows query
- _get_ekb_median: median query

db.rollback() removed из всех 3 catches.

Refs: PR #155 bot review

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Co-authored-by: lekss361 <claudestars@proton.me>
2026-05-15 08:52:38 +03:00
..
v1 fix(site-finder): cascade InFailedSqlTransaction — velocity internal rollback (#155) 2026-05-15 08:52:38 +03:00
__init__.py init 2026-04-25 13:45:19 +03:00