Barcode Betty
42 lines
1.6 KiB
Python
42 lines
1.6 KiB
Python
"""ShrinkflationEvent model."""
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import uuid
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from datetime import date
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from decimal import Decimal
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from typing import TYPE_CHECKING
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from sqlalchemy import Date, ForeignKey, Numeric, String
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from sqlalchemy.orm import Mapped, mapped_column, relationship
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from cartsnitch_api.constants import SizeUnit
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from cartsnitch_api.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin
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if TYPE_CHECKING:
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from cartsnitch_api.models.product import NormalizedProduct
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class ShrinkflationEvent(UUIDPrimaryKeyMixin, TimestampMixin, Base):
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"""Detected shrinkflation event — product size changed while price held or rose."""
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__tablename__ = "shrinkflation_events"
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normalized_product_id: Mapped[uuid.UUID] = mapped_column(
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ForeignKey("normalized_products.id"), nullable=False
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)
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detected_date: Mapped[date] = mapped_column(Date, nullable=False)
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old_size: Mapped[str] = mapped_column(String(50), nullable=False)
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new_size: Mapped[str] = mapped_column(String(50), nullable=False)
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old_unit: Mapped[SizeUnit] = mapped_column(String(10), nullable=False)
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new_unit: Mapped[SizeUnit] = mapped_column(String(10), nullable=False)
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price_at_old_size: Mapped[Decimal | None] = mapped_column(Numeric(10, 2))
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price_at_new_size: Mapped[Decimal | None] = mapped_column(Numeric(10, 2))
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confidence: Mapped[Decimal] = mapped_column(
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Numeric(3, 2), nullable=False, default=Decimal("1.00")
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)
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notes: Mapped[str | None] = mapped_column(String(1000))
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# Relationships
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normalized_product: Mapped["NormalizedProduct"] = relationship(
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back_populates="shrinkflation_events"
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)
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