guideCity/backend/app/models/city.py

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from datetime import datetime
from geoalchemy2 import Geography
from sqlalchemy import DateTime, String, func
from sqlalchemy.orm import Mapped, mapped_column, relationship
from app.db.base import Base
class City(Base):
__tablename__ = "cities"
id: Mapped[int] = mapped_column(primary_key=True)
slug: Mapped[str] = mapped_column(String(64), unique=True, nullable=False)
name_ru: Mapped[str] = mapped_column(String(128), nullable=False)
name_en: Mapped[str] = mapped_column(String(128), nullable=False)
country_code: Mapped[str] = mapped_column(String(2), nullable=False, default="RU")
center_point = mapped_column(
Geography(geometry_type="POINT", srid=4326, spatial_index=False), nullable=True
)
created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
places: Mapped[list["Place"]] = relationship(back_populates="city", cascade="all, delete-orphan")