"""
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()