#  请求和响应模型
from datetime import date
from pydantic import BaseModel,Field
from typing import Optional

# 新增班级
class ClassCreate(BaseModel):
    class_name: str=Field(...,min_length=2,max_length=20,description="班级名称")
    start_time: Optional[date]=Field(None,description="开课时间")

# 修改班级
class ClassUpdate(BaseModel):
    class_name: Optional[str]=Field(...,min_length=2,max_length=20,description="班级名称")
    start_time: Optional[date]=Field(None,description="开课时间")
    statu: Optional[int]=Field(None,ge=0,le=1,description="判断存不存在")

# 响应模型
class ClassIn(BaseModel):
    id: int
    class_name: str
    start_time: Optional[date]
    statu: int

    class Config:
        from_attributes=True