25 lines
787 B
Python
25 lines
787 B
Python
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"""Lock model."""
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from datetime import datetime, timezone
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from sqlalchemy import DateTime, String
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from sqlalchemy.orm import Mapped, mapped_column
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from app.models.base import Base, UUIDMixin
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def _utc_now() -> datetime:
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return datetime.now(timezone.utc)
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class Lock(Base, UUIDMixin):
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"""Distributed lock record (fallback when Redis is unavailable)."""
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__tablename__ = "locks"
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lock_name: Mapped[str] = mapped_column(String(128), unique=True, nullable=False, index=True)
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owner_id: Mapped[str | None] = mapped_column(String(128), nullable=True)
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acquired_at: Mapped[datetime] = mapped_column(
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DateTime(timezone=True), nullable=False, default=_utc_now
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)
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expires_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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