from sqlalchemy import Float
from sqlalchemy.orm import Mapped, mapped_column

from app.core.database import Base


class IsoThread(Base):
    __tablename__ = "iso_threads"

    id: Mapped[int] = mapped_column(primary_key=True)
    diameter_mm: Mapped[float] = mapped_column(Float, nullable=False)
    pitch_mm: Mapped[float] = mapped_column(Float, nullable=False)
    depth_mm: Mapped[float | None] = mapped_column(Float, nullable=True, default=None)