优化了students_dao里add_student_dao的报错逻辑。

main.py

@@ -9,12 +9,12 @@ from databases import *
 app = FastAPI(title="学生管理系统")
 
 
-app.include_router(Classes_API,tags=["classes"])
-app.include_router(Scores_API,tags=["scores"])
-app.include_router(Shtudent_Jiuye,tags=["Employments"])
-app.include_router(Students_API,tags=["students"])
-app.include_router(Teachers_API,tags=["teachers"])
-app.include_router(StatCalc_API,tags=["StatCalc"])
+app.include_router(Classes_API,tags=["班级管理模块"])
+app.include_router(Scores_API,tags=["学生考核成绩管理模块"])
+app.include_router(Shtudent_Jiuye,tags=["学生就业管理模块"])
+app.include_router(Students_API,tags=["学生管理模块"])
+app.include_router(Teachers_API,tags=["老师管理模块"])
+app.include_router(StatCalc_API,tags=["统计分析模块"])
 
 
 if __name__ == "__main__":