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# -*- coding: utf-8 -*-
from pydantic import BaseModel
from typing import Any, TypeVar, Type, Generic
from sqlalchemy.orm import DeclarativeBase
ModelType = TypeVar("ModelType", bound=DeclarativeBase)
SchemaType = TypeVar("SchemaType", bound=BaseModel)
class Serialize(Generic[ModelType, SchemaType]):
"""
序列化工具类提供模型、Schema 和字典之间的转换功能
"""
@classmethod
def schema_to_model(cls,schema: Type[SchemaType], model: Type[ModelType]) -> ModelType:
"""
将 Pydantic Schema 转换为 SQLAlchemy 模型
参数:
- schema (Type[SchemaType]): Pydantic Schema 实例。
- model (Type[ModelType]): SQLAlchemy 模型类。
返回:
- ModelType: SQLAlchemy 模型实例。
异常:
- ValueError: 转换过程中可能抛出的异常。
"""
try:
return model(**cls.model_to_dict(model, schema))
except Exception as e:
raise ValueError(f"序列化失败: {str(e)}")
@classmethod
def model_to_dict(cls, model: Type[ModelType], schema: Type[SchemaType]) -> dict[str, Any]:
"""
将 SQLAlchemy 模型转换为 Pydantic Schema
参数:
- model (Type[ModelType]): SQLAlchemy 模型实例。
- schema (Type[SchemaType]): Pydantic Schema 类。
返回:
- dict[str, Any]: 包含模型数据的字典。
异常:
- ValueError: 转换过程中可能抛出的异常。
"""
try:
return schema.model_validate(model).model_dump()
except Exception as e:
raise ValueError(f"反序列化失败: {str(e)}")