17 lines
599 B
Python
17 lines
599 B
Python
"""JSON-safe serialization helpers (contract: ISO 8601 UTC with `Z`)."""
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from datetime import date, datetime, timezone
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def to_iso(value: datetime | None) -> str | None:
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"""Timestamptz -> '2026-08-02T10:00:00Z' (UTC). Naive values are treated as UTC."""
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if value is None:
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return None
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if value.tzinfo is None:
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value = value.replace(tzinfo=timezone.utc)
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return value.astimezone(timezone.utc).isoformat().replace("+00:00", "Z")
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def to_date(value: date | None) -> str | None:
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"""Date -> 'YYYY-MM-DD'."""
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return value.isoformat() if value is not None else None
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