first commit

backend/app/models/transaction.py

@@ -0,0 +1,35 @@
+"""Transaction model - 交易记录."""
+
+from __future__ import annotations
+from datetime import datetime
+from decimal import Decimal
+from sqlalchemy import String, Text, DateTime, Numeric, ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.models.database import Base
+
+
+class Transaction(Base):
+    __tablename__ = "transactions"
+
+    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
+    case_id: Mapped[int] = mapped_column(ForeignKey("cases.id", ondelete="CASCADE"), index=True)
+    screenshot_id: Mapped[int] = mapped_column(ForeignKey("screenshots.id", ondelete="CASCADE"), index=True)
+    app_source: Mapped[str] = mapped_column(String(128))
+    transaction_type: Mapped[str] = mapped_column(String(32))  # 转出/转入/消费/收款/提现/充值
+    amount: Mapped[Decimal] = mapped_column(Numeric(18, 2))
+    currency: Mapped[str] = mapped_column(String(16), default="CNY")
+    counterparty_name: Mapped[str | None] = mapped_column(String(256), nullable=True)
+    counterparty_account: Mapped[str | None] = mapped_column(String(512), nullable=True)
+    order_number: Mapped[str | None] = mapped_column(String(128), nullable=True)
+    transaction_time: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+    remark: Mapped[str | None] = mapped_column(Text, nullable=True)
+    raw_text: Mapped[str | None] = mapped_column(Text, nullable=True)
+    confidence: Mapped[str] = mapped_column(String(16), default="medium")  # high | medium | low
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    case: Mapped["Case"] = relationship("Case", back_populates="transactions")
+    screenshot: Mapped["Screenshot"] = relationship("Screenshot", back_populates="transactions")
+
+    def __repr__(self) -> str:
+        return f"<Transaction(id={self.id}, amount={self.amount}, app={self.app_source})>"