45 lines
1.8 KiB
Python
45 lines
1.8 KiB
Python
from __future__ import annotations
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from datetime import date, datetime
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from sqlalchemy import Date, DateTime, Float, ForeignKey, String, Text
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from sqlalchemy.orm import Mapped, mapped_column, relationship
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from app.db.session import Base
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class RawMaterial(Base):
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__tablename__ = "raw_materials"
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id: Mapped[int] = mapped_column(primary_key=True)
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tenant_id: Mapped[str] = mapped_column(String(64), default="default")
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name: Mapped[str] = mapped_column(String(255), unique=True, index=True)
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supplier: Mapped[str | None] = mapped_column(String(255), nullable=True)
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unit_of_measure: Mapped[str] = mapped_column(String(64))
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kg_per_unit: Mapped[float] = mapped_column(Float)
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status: Mapped[str] = mapped_column(String(32), default="active")
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notes: Mapped[str | None] = mapped_column(Text, nullable=True)
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created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
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price_versions: Mapped[list["RawMaterialPriceVersion"]] = relationship(
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back_populates="raw_material",
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cascade="all, delete-orphan",
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order_by="desc(RawMaterialPriceVersion.effective_date)",
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)
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class RawMaterialPriceVersion(Base):
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__tablename__ = "raw_material_price_versions"
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id: Mapped[int] = mapped_column(primary_key=True)
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raw_material_id: Mapped[int] = mapped_column(ForeignKey("raw_materials.id"), index=True)
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market_value: Mapped[float] = mapped_column(Float)
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waste_percentage: Mapped[float] = mapped_column(Float, default=0.0)
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effective_date: Mapped[date] = mapped_column(Date, default=date.today)
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status: Mapped[str] = mapped_column(String(32), default="active")
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notes: Mapped[str | None] = mapped_column(Text, nullable=True)
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created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
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raw_material: Mapped[RawMaterial] = relationship(back_populates="price_versions")
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