32 lines
1.2 KiB
Python
32 lines
1.2 KiB
Python
from __future__ import annotations
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from decimal import Decimal
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from sqlalchemy import CheckConstraint, ForeignKey, Numeric
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from sqlalchemy.orm import Mapped, mapped_column, relationship
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from app.models.base import Base
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class OrderItem(Base):
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__tablename__ = "order_items"
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__table_args__ = (
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CheckConstraint("quantity > 0", name="ck_order_items_quantity_positive"),
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CheckConstraint("unit_price > 0", name="ck_order_items_unit_price_positive"),
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CheckConstraint("subtotal >= 0", name="ck_order_items_subtotal_non_negative"),
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)
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id: Mapped[int] = mapped_column(primary_key=True)
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order_id: Mapped[int] = mapped_column(ForeignKey("orders.id"), nullable=False, index=True)
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product_id: Mapped[int] = mapped_column(ForeignKey("products.id"), nullable=False, index=True)
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quantity: Mapped[int] = mapped_column(nullable=False)
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unit_price: Mapped[Decimal] = mapped_column(Numeric(10, 2), nullable=False)
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subtotal: Mapped[Decimal] = mapped_column(Numeric(10, 2), nullable=False)
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order = relationship("Order", back_populates="items")
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product = relationship("Product", lazy="joined")
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@property
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def product_name(self) -> str:
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return self.product.name
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