95 lines
2.5 KiB
Python
95 lines
2.5 KiB
Python
"""定价方案模型
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管理项目定价方案，支持多种定价策略
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"""
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from typing import Optional, List, TYPE_CHECKING
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from decimal import Decimal
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from sqlalchemy import BigInteger, String, Boolean, Text, ForeignKey, DECIMAL
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from sqlalchemy.orm import Mapped, mapped_column, relationship
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from app.models.base import BaseModel
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if TYPE_CHECKING:
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from app.models.project import Project
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from app.models.user import User
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from app.models.profit_simulation import ProfitSimulation
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class PricingPlan(BaseModel):
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"""定价方案表"""
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__tablename__ = "pricing_plans"
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project_id: Mapped[int] = mapped_column(
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BigInteger,
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ForeignKey("projects.id"),
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nullable=False,
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index=True,
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comment="项目ID"
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)
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plan_name: Mapped[str] = mapped_column(
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String(100),
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nullable=False,
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comment="方案名称"
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)
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strategy_type: Mapped[str] = mapped_column(
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String(20),
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nullable=False,
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index=True,
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comment="策略类型：traffic-引流款, profit-利润款, premium-高端款"
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)
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base_cost: Mapped[Decimal] = mapped_column(
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DECIMAL(12, 2),
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nullable=False,
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comment="基础成本"
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)
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target_margin: Mapped[Decimal] = mapped_column(
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DECIMAL(5, 2),
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nullable=False,
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comment="目标毛利率(%)"
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)
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suggested_price: Mapped[Decimal] = mapped_column(
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DECIMAL(12, 2),
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nullable=False,
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comment="建议价格"
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)
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final_price: Mapped[Optional[Decimal]] = mapped_column(
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DECIMAL(12, 2),
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nullable=True,
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comment="最终定价"
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)
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ai_advice: Mapped[Optional[str]] = mapped_column(
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Text,
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nullable=True,
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comment="AI建议内容"
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)
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is_active: Mapped[bool] = mapped_column(
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Boolean,
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nullable=False,
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default=True,
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comment="是否启用"
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)
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created_by: Mapped[Optional[int]] = mapped_column(
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BigInteger,
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ForeignKey("users.id"),
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nullable=True,
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comment="创建人ID"
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)
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# 关系
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project: Mapped["Project"] = relationship(
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"Project",
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back_populates="pricing_plans"
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)
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creator: Mapped[Optional["User"]] = relationship(
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"User",
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back_populates="created_pricing_plans"
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)
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profit_simulations: Mapped[List["ProfitSimulation"]] = relationship(
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"ProfitSimulation",
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back_populates="pricing_plan",
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cascade="all, delete-orphan"
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)
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