51 lines
1.8 KiB
Python
51 lines
1.8 KiB
Python
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"""产品模型"""
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import uuid
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from datetime import datetime, timezone
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from sqlalchemy import String, DateTime, ForeignKey
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from sqlalchemy.dialects.postgresql import UUID
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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 Product(Base):
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__tablename__ = "products"
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id: Mapped[uuid.UUID] = mapped_column(
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UUID(as_uuid=True), primary_key=True, default=uuid.uuid4,
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)
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serial_number: Mapped[str] = mapped_column(
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String(16), unique=True, index=True, nullable=False, comment="产品序列号(16位)",
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)
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# ---- 物理外键（关联本库 production_orders） ----
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order_id: Mapped[uuid.UUID] = mapped_column(
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UUID(as_uuid=True), ForeignKey("production_orders.id"), nullable=False, comment="所属订单ID",
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)
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# ---- 逻辑外键（关联老系统物料表，仅存储 ID，无物理约束） ----
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material_id: Mapped[str | None] = mapped_column(
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String(64), nullable=True, comment="物料ID(逻辑外键→老系统)",
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)
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# ---- 物理外键（自引用：父产品） ----
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parent_product_id: Mapped[uuid.UUID | None] = mapped_column(
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UUID(as_uuid=True), ForeignKey("products.id"), nullable=True, comment="父产品ID",
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)
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status: Mapped[str] = mapped_column(
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String(50), nullable=False, default="pending", comment="产品状态",
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)
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created_at: Mapped[datetime] = mapped_column(
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DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), comment="创建时间",
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)
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# ---- 关系 ----
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order: Mapped["ProductionOrder"] = relationship("ProductionOrder", lazy="selectin")
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parent_product: Mapped["Product | None"] = relationship(
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"Product", remote_side="Product.id", lazy="selectin",
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)
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def __repr__(self) -> str:
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return f"<Product {self.serial_number}>"
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