59 lines
2.3 KiB
Python
59 lines
2.3 KiB
Python
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"""产品模型：产品主数据。
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产品类别（product_category）是**折算阈值的行级锚点**：混合业务按产品逐条
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计算（对照表 #14），阈值本身由 M1 参数 `product.threshold` 按 PRODUCT_CATEGORY
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维度承担（#28「全部阈值统一在系统设置维护」），本表不建阈值列 —— 两处维护
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必然漂移。类别值域与 M1 参数维度共用 PRODUCT_CATEGORIES 常量。
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"""
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from decimal import Decimal
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from sqlalchemy import Numeric, String, UniqueConstraint
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from sqlalchemy.orm import Mapped, mapped_column
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from app.models.base import (
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BIGINT_UNSIGNED,
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TINYINT_TYPE,
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Base,
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TimestampMixin,
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TPlusSyncMixin,
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mysql_table_args,
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)
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class Product(Base, TimestampMixin, TPlusSyncMixin):
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"""产品表（需求 2.1.2）。停用（status=0）为主，不物理删除。"""
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__tablename__ = "products"
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__table_args__ = mysql_table_args(
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"产品表（类别锚定折算阈值参数；T+同步不覆盖产品类别）",
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UniqueConstraint("product_name", "spec_model", name="uk_products_name_spec"),
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)
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id: Mapped[int] = mapped_column(
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BIGINT_UNSIGNED, primary_key=True, autoincrement=True, comment="主键ID"
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)
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product_name: Mapped[str] = mapped_column(String(128), nullable=False, comment="产品名称")
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spec_model: Mapped[str] = mapped_column(
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String(128),
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nullable=False,
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server_default="''",
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comment="规格型号（空串而非 NULL：参与组合唯一键，MySQL 组合索引对 NULL 不去重）",
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)
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unit: Mapped[str | None] = mapped_column(String(16), comment="计量单位")
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stock_quantity: Mapped[Decimal | None] = mapped_column(
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Numeric(14, 2), comment="数量（T+ 同步原样存储，语义待 IT 确认）"
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)
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sale_price: Mapped[Decimal | None] = mapped_column(
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Numeric(14, 4), comment="销售单价（元，T+ 同步）"
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)
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product_category: Mapped[str] = mapped_column(
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String(32),
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nullable=False,
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comment="产品类别：municipal_water市政水利 rail_transit轨道交通（决定折算阈值 30%/20%；T+同步不覆盖）",
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)
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status: Mapped[int] = mapped_column(
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TINYINT_TYPE, nullable=False, server_default="1", comment="状态：1启用 0停用"
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)
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remark: Mapped[str | None] = mapped_column(String(255), comment="备注")
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