27 lines
771 B
Python
27 lines
771 B
Python
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# dao/exceptions.py
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# 数据访问层异常：不依赖 FastAPI，由 main.py 统一注册处理器映射成 HTTP 状态码
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#
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# 这样 api 层就不需要 try/except，也不需要 import HTTPException，
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# 只负责「调用 dao + 组装响应」两件事。
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class DaoError(Exception):
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"""DAO 层异常基类：携带 HTTP 状态码与前端可读的提示信息"""
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status_code = 500
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def __init__(self, detail: str):
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self.detail = detail
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super().__init__(detail)
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class NotFoundError(DaoError):
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"""目标记录不存在、已删除，或外键指向的记录不存在 → 404"""
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status_code = 404
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class ConflictError(DaoError):
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"""主键重复、唯一字段冲突、一对一关系重复 → 409"""
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status_code = 409
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