Initial commit: 智能项目定价模型

后端服务/app/models/sensitivity_analysis.py

@@ -0,0 +1,55 @@
+"""敏感性分析模型
+
+记录价格变动对利润的敏感性分析结果
+"""
+
+from typing import TYPE_CHECKING
+from decimal import Decimal
+
+from sqlalchemy import BigInteger, ForeignKey, DECIMAL
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.models.base import BaseModel
+
+if TYPE_CHECKING:
+    from app.models.profit_simulation import ProfitSimulation
+
+
+class SensitivityAnalysis(BaseModel):
+    """敏感性分析表"""
+    
+    __tablename__ = "sensitivity_analyses"
+    
+    simulation_id: Mapped[int] = mapped_column(
+        BigInteger,
+        ForeignKey("profit_simulations.id"),
+        nullable=False,
+        index=True,
+        comment="模拟ID"
+    )
+    price_change_rate: Mapped[Decimal] = mapped_column(
+        DECIMAL(5, 2),
+        nullable=False,
+        comment="价格变动率(%)：如 -20, -10, 0, 10, 20"
+    )
+    adjusted_price: Mapped[Decimal] = mapped_column(
+        DECIMAL(12, 2),
+        nullable=False,
+        comment="调整后价格"
+    )
+    adjusted_profit: Mapped[Decimal] = mapped_column(
+        DECIMAL(14, 2),
+        nullable=False,
+        comment="调整后利润"
+    )
+    profit_change_rate: Mapped[Decimal] = mapped_column(
+        DECIMAL(5, 2),
+        nullable=False,
+        comment="利润变动率(%)"
+    )
+    
+    # 关系
+    simulation: Mapped["ProfitSimulation"] = relationship(
+        "ProfitSimulation",
+        back_populates="sensitivity_analyses"
+    )