Samir Boulahtit bdb613581c fix(timestamps): callable default so each row gets a fresh timestamp ...

TimestampMixin was setting default=datetime.now(UTC) — calling the
function once at module import time. Every INSERT (and every UPDATE
via onupdate) since the app last restarted got stamped with the same
process-start timestamp, silently breaking created_at / updated_at on
every table that uses the mixin (customers, stores, cards, users,
orders, etc.).

Pass the _utc_now callable instead so SQLAlchemy invokes it per row.
Forward fix only — historical rows on prod since the most recent app
restart all read as the start-time microsecond and will need a
separate decision on whether to backfill.

Found while debugging why a customer + their loyalty card had
microsecond-identical created_at timestamps despite being created
through separate service calls.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-16 19:44:35 +02:00

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