chengkai3
38 lines
1.3 KiB
Python
38 lines
1.3 KiB
Python
from __future__ import annotations
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from typing import TYPE_CHECKING
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from sqlalchemy import Float, ForeignKey, Index, Integer, String, UniqueConstraint
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from sqlalchemy.orm import Mapped, mapped_column, relationship
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from ..core.database import Base
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if TYPE_CHECKING:
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from .lightning_event import LightningCurrentEvent
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class LightningCurrentSample(Base):
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__tablename__ = "lightning_current_sample"
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__table_args__ = (
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UniqueConstraint("event_ref_id", "seq_no", name="uq_lc_sample_event_seq"),
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Index("idx_lc_sample_event_seq", "event_ref_id", "seq_no"),
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Index("idx_lc_sample_event_time", "event_ref_id", "time_us"),
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)
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id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
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event_ref_id: Mapped[str] = mapped_column(
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String(32),
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ForeignKey("lightning_current_event.id", ondelete="CASCADE"),
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nullable=False,
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index=True,
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)
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seq_no: Mapped[int] = mapped_column(Integer, nullable=False)
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time_us: Mapped[float] = mapped_column(Float, nullable=False)
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current_ka: Mapped[float] = mapped_column(Float, nullable=False)
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event: Mapped[LightningCurrentEvent] = relationship(
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"LightningCurrentEvent",
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back_populates="samples",
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lazy="selectin",
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)
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