Samir Boulahtit
bdb613581c
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>
41 lines
1.1 KiB
Python
41 lines
1.1 KiB
Python
from datetime import UTC, datetime
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from sqlalchemy import Column, DateTime, ForeignKey, Integer
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from app.core.database import Base
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def _utc_now() -> datetime:
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return datetime.now(UTC)
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class TimestampMixin:
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"""Mixin to add created_at and updated_at timestamps to models"""
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# Pass the callable, not its result. Otherwise the default is evaluated
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# once at module import and every row gets the same timestamp.
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created_at = Column(DateTime, default=_utc_now, nullable=False)
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updated_at = Column(
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DateTime,
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default=_utc_now,
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onupdate=_utc_now,
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nullable=False,
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)
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class SoftDeleteMixin:
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"""Mixin for soft-deletable models.
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Adds deleted_at and deleted_by_id columns. Records with deleted_at set
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are automatically excluded from queries via the do_orm_execute event
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in app.core.database. Use execution_options={"include_deleted": True}
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to bypass the filter.
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"""
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deleted_at = Column(DateTime, nullable=True, index=True)
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deleted_by_id = Column(
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Integer,
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ForeignKey("users.id", ondelete="SET NULL"),
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nullable=True,
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)
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