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业务异常基类模块
"""
from __future__ import annotations
from typing import TYPE_CHECKING, Any
if TYPE_CHECKING:
from django.utils.functional import Promise
__all__: list[str] = [
"BusinessException",
"BusinessError",
]
class BusinessException(Exception):
"""
业务异常基类
所有自定义业务异常都应该继承此类
Attributes:
message: 错误消息(用户可读)
code: 错误码(用于前端判断)
errors: 结构化错误详情(字段级别的错误)
"""
def __init__(self, message: str | Promise, code: str | None = None, errors: dict[str, Any] | None = None) -> None:
"""
初始化业务异常
Args:
message: 错误消息(用户可读)
code: 错误码(用于前端判断),默认使用类名
errors: 结构化错误详情(字段级别的错误)
"""
self.message = message
self.code = code or self.__class__.__name__
self.errors = errors or {}
super().__init__(str(message))
def __str__(self) -> str:
"""返回字符串表示"""
return f"{self.code}: {self.message}"
def __repr__(self) -> str:
"""返回详细的字符串表示"""
return f"{self.__class__.__name__}(message={self.message!r}, code={self.code!r}, errors={self.errors!r})"
def to_dict(self) -> dict[str, Any]:
"""
转换为字典(用于 API 响应)
Returns:
包含 success、code、message、error、errors 字段的字典
"""
return {
"success": False,
"code": self.code,
"message": str(self.message),
"error": self.message,
"errors": self.errors,
}
class BusinessError(BusinessException):
"""业务逻辑异常基类(向后兼容)"""
def __init__(self, message: str | Promise, code: str = "BUSINESS_ERROR", status: int = 400) -> None:
super().__init__(message, code)
self.status = status
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