chengkai3
54 lines
1.9 KiB
Python
54 lines
1.9 KiB
Python
from __future__ import annotations
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from datetime import datetime
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from typing import TYPE_CHECKING, Any
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from uuid import uuid4
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from sqlalchemy import JSON, DateTime, Index, Integer, String
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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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from .base import utcnow
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if TYPE_CHECKING:
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from .line_tower import LineTower
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class Line(Base):
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__tablename__ = "power_line"
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__table_args__ = (
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Index("idx_power_line_code", "code"),
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Index("idx_power_line_status", "status"),
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Index("idx_power_line_voltage", "voltage_kv"),
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)
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id: Mapped[str] = mapped_column(
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String(32),
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primary_key=True,
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default=lambda: uuid4().hex,
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)
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code: Mapped[str] = mapped_column(String(64), unique=True, nullable=False)
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name: Mapped[str] = mapped_column(String(255), nullable=False)
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voltage_kv: Mapped[int | None] = mapped_column(Integer, index=True)
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tower_shape: Mapped[str | None] = mapped_column(String(64))
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phase_sequence_json: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict)
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arrester_install_json: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict)
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lightning_param_json: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict)
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status: Mapped[str] = mapped_column(String(20), default="enabled", index=True)
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create_date: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utcnow, index=True)
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create_user: Mapped[str | None] = mapped_column(String(64), index=True)
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update_date: Mapped[datetime] = mapped_column(
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DateTime(timezone=True),
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default=utcnow,
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onupdate=utcnow,
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)
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update_user: Mapped[str | None] = mapped_column(String(64), index=True)
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towers: Mapped[list[LineTower]] = relationship(
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"LineTower",
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back_populates="line",
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lazy="selectin",
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cascade="all, delete-orphan",
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order_by="LineTower.seq_no.asc()",
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)
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