Upload modelli stock e contratti

backend/app/models/contract.py

@@ -0,0 +1,42 @@
+from datetime import datetime, timezone
+from sqlalchemy import String, DateTime, Integer, ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from app.core.database import Base
+
+
+class Contract(Base):
+    __tablename__ = "contracts"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    contract_number: Mapped[str] = mapped_column(String(50), nullable=False)
+    year: Mapped[int] = mapped_column(Integer, nullable=False)
+    company: Mapped[str] = mapped_column(String(100), nullable=False)
+    area: Mapped[str | None] = mapped_column(String(100))
+    plate: Mapped[str | None] = mapped_column(String(10))
+    customer_name: Mapped[str | None] = mapped_column(String(200))
+    import_batch: Mapped[str | None] = mapped_column(String(100))
+    imported_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+
+    valuation_contracts: Mapped[list["ValuationContract"]] = relationship(
+        "ValuationContract", back_populates="contract"
+    )
+
+
+class ValuationContract(Base):
+    __tablename__ = "valuation_contracts"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    valuation_id: Mapped[int] = mapped_column(Integer, ForeignKey("valuations.id"), nullable=False)
+    contract_id: Mapped[int] = mapped_column(Integer, ForeignKey("contracts.id"), nullable=False)
+    linked_by: Mapped[int] = mapped_column(Integer, ForeignKey("users.id"), nullable=False)
+    linked_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+
+    valuation: Mapped["Valuation"] = relationship("Valuation", back_populates="contracts")
+    contract: Mapped["Contract"] = relationship("Contract", back_populates="valuation_contracts")
+
+
+from app.models.valuation import Valuation