from pydantic import BaseModel,Field,ConfigDict
from datetime import datetime
class ClassRequest(BaseModel): #定义更新班级信息的请求体
    class_id: str = Field(...,)
    class_name: str = Field(...,)
    ht_id: int = Field(...)
    t_id: int = Field(...)
    start_time: datetime = Field(...)
    model_config = ConfigDict(from_attributes=True)
class ClassCreate(ClassRequest):
    pass
class ClassUpdate(ClassRequest):
    pass
class ClassResponse(BaseModel): #定义响应体
    code:int = 200
    detail:str ='OK'
    totals:int = 0
    data:ClassRequest | None = None #原来的写法str | dict | list | tuple 这几种类型里，
                                    #一个都匹配不上路由里传的ORM对象result（Class类的实例），所以报错500