59 lines
2.2 KiB
Python
59 lines
2.2 KiB
Python
import uuid
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from decimal import Decimal
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from typing import TYPE_CHECKING, List, Optional
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from sqlalchemy import Column, ForeignKey, Numeric, Unicode, UniqueConstraint
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from sqlalchemy.dialects.postgresql import UUID
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from sqlalchemy.orm import Mapped, relationship
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from .meta import Base
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if TYPE_CHECKING:
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# if the target of the relationship is in another module
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# that cannot normally be imported at runtime
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from .batch import Batch
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from .product import Product
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from .recipe import Recipe
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class StockKeepingUnit(Base):
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__tablename__ = "stock_keeping_units"
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__table_args__ = (UniqueConstraint("product_id", "units"),)
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id: uuid.UUID = Column("id", UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
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product_id: uuid.UUID = Column("product_id", UUID(as_uuid=True), ForeignKey("products.id"), nullable=False)
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units: str = Column("units", Unicode(255), nullable=False)
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fraction: Decimal = Column("fraction", Numeric(precision=15, scale=5), nullable=False)
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product_yield: Decimal = Column("product_yield", Numeric(precision=15, scale=5), nullable=False)
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cost_price: Decimal = Column("cost_price", Numeric(precision=15, scale=2), nullable=False)
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sale_price: Decimal = Column("sale_price", Numeric(precision=15, scale=2), nullable=False)
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product: Mapped["Product"] = relationship("Product", back_populates="skus")
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batches: List["Batch"] = relationship("Batch", back_populates="sku")
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recipes: List["Recipe"] = relationship("Recipe", back_populates="sku")
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def __init__(
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self,
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units: str,
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fraction: Decimal,
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product_yield: Decimal,
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cost_price: Decimal,
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sale_price: Decimal,
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product_id: Optional[uuid.UUID] = None,
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product: Optional["Product"] = None,
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id_: Optional[uuid.UUID] = None,
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) -> None:
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if product_id is not None:
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self.product_id = product_id
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self.units = units
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self.fraction = fraction
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self.product_yield = product_yield
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self.cost_price = cost_price
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self.sale_price = sale_price
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if id_ is not None:
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self.id = id_
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if product is not None:
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self.product = product
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