50 lines
1.6 KiB
Python
50 lines
1.6 KiB
Python
import uuid
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from decimal import Decimal
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from typing import TYPE_CHECKING, Optional
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from sqlalchemy import Column, ForeignKey, Numeric, 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 .rate_contract import RateContract
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from .stock_keeping_unit import StockKeepingUnit
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class RateContractItem(Base):
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__tablename__ = "rate_contract_items"
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__table_args__ = (UniqueConstraint("rate_contract_id", "sku_id"),)
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id: uuid.UUID = Column("id", UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
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rate_contract_id: uuid.UUID = Column(
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"rate_contract_id",
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UUID(as_uuid=True),
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ForeignKey("rate_contracts.id"),
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nullable=False,
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index=True,
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)
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sku_id: uuid.UUID = Column("sku_id", UUID(as_uuid=True), ForeignKey("stock_keeping_units.id"), nullable=False)
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price: Decimal = Column("cost_price", Numeric(precision=15, scale=2), nullable=False)
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rate_contract: Mapped["RateContract"] = relationship("RateContract", back_populates="items")
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sku: Mapped["StockKeepingUnit"] = relationship("StockKeepingUnit")
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def __init__(
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self,
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rate_contract_id: uuid.UUID,
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sku_id: uuid.UUID,
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price: Decimal,
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id_: Optional[uuid.UUID] = None,
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) -> None:
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self.rate_contract_id = rate_contract_id
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self.sku_id = sku_id
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self.price = price
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if id_ is not None:
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self.id = id_
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