39 lines
1.1 KiB
Python
39 lines
1.1 KiB
Python
from __future__ import annotations
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from datetime import UTC, datetime
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from sqlalchemy import DateTime as SQLADateTime
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from sqlalchemy import TypeDecorator
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from sqlalchemy.orm import DeclarativeBase
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def utcnow() -> datetime:
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"""
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Return current UTC time as timezone-aware datetime.
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This is the canonical way to get current UTC time for database fields.
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"""
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return datetime.now(tz=UTC)
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class UTCDateTime(TypeDecorator):
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impl = SQLADateTime
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cache_ok = True
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def process_bind_param(self, value: datetime | None, _dialect) -> datetime | None:
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"""Convert datetime to UTC before storing."""
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if value is not None:
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if value.tzinfo is None:
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return value.replace(tzinfo=UTC)
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return value.astimezone(UTC).replace(tzinfo=None)
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return value
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def process_result_value(self, value: datetime | None, _dialect) -> datetime | None:
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"""Ensure datetime is timezone-aware (UTC) when loading."""
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if value is not None and value.tzinfo is None:
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return value.replace(tzinfo=UTC)
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return value
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class Base(DeclarativeBase):
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pass
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