初始版本

backend/app/models/transaction.py

@@ -0,0 +1,25 @@
+"""
+记账记录模型
+"""
+from datetime import date
+from typing import Optional
+from decimal import Decimal
+from sqlmodel import SQLModel, Field, Relationship, Column
+from sqlalchemy import Numeric
+from .user import User
+
+
+class Transaction(SQLModel, table=True):
+    """记账记录表"""
+    __tablename__ = "transactions"
+    
+    id: Optional[int] = Field(default=None, primary_key=True)
+    amount: Decimal = Field(sa_column=Column(Numeric(10, 2)))  # 正数为收入，负数为支出
+    category: str = Field(max_length=50)
+    description: Optional[str] = Field(default=None, max_length=200)
+    date: date
+    user_id: int = Field(foreign_key="users.id", index=True)
+    
+    # 关系
+    user: Optional[User] = Relationship()
+