整体bug修改。

class_management/api/class_management_api.py

@@ -16,7 +16,6 @@ def add_class(cla:ClassCreate,db=Depends(get_db)):
         raise HTTPException(status_code=400,detail='新增失败，班级已存在')
     return ClassResponse(detail='新增成功',totals=1,data=c_dict)
 
-
 #更新接口
 @class_api.put("/{class_id}",summary='修改班级信息')
 def update_class(class_id:int

class_management/dao/class_management_dao.py

@@ -20,7 +20,6 @@ def add_class_dao(c,db):
         db.refresh(c1)
         return True
 
-
 #更新班级信息
 def update_class_dao(cid,update_data,db):
     try:

class_management/database.py

@@ -11,7 +11,7 @@ DB_HOST = os.getenv("DB_HOST", "localhost")
 DB_PORT = os.getenv("DB_PORT", "3306")
 DB_NAME = os.getenv("DB_NAME", "student_manage_system")
 
-class_management_url = "mysql+pymysql://root:123456@localhost:3306/student_manage_system?charset=utf8mb4"
+class_management_url = f"mysql+pymysql://{DB_USER}:{DB_PASSWORD}@{DB_HOST}:{DB_PORT}/{DB_NAME}?charset=utf8mb4"
 
 engine = create_engine(class_management_url)
 SessionLocal = sessionmaker(bind=engine,autocommit=False, autoflush=False)