# 导入datetime时间类型，用来接收开班时间
from datetime import datetime
# 从pydantic导入BaseModel(模型基类)、Field(字段校验+描述)
from pydantic import BaseModel, Field

# 请求体模型：新增班级时，前端传给后台的数据结构
class ClassAdd(BaseModel):
    class_name:str = Field(...,max_length=10,description="班级名称")
    start_time:datetime = Field(...,description="开班时间")
    head_teacher:str = Field(...,max_length=10,description="班主任")
    teacher:str = Field(...,max_length=15,description="任课老师")

# 响应体模型：后台返回给前端的数据
class ClassResp(ClassAdd):
    cid: int = Field(..., description="班级主键cid")