test二轮完成的版本，并入了浩钦的班级模块

api/wl_class_api.py

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+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+from typing import List
+from database import get_db
+from scheme.wl_class_scheme import ClassCreate,ClassUpdate,ClassOut
+from dao import wl_class_dao
+from fastapi import HTTPException
+
+# 创建班级模块的路由，统一前缀 /classes
+router = APIRouter(prefix="/classes", tags=["班级管理"])
+
+# 1. 新增班级
+@router.post("/", response_model=ClassOut)
+def create_class(class_data: ClassCreate, db: Session = Depends(get_db)):
+    return wl_class_dao.create_class(db, class_data.model_dump())
+
+#为了合并先注释的部分
+# @router.post("/", response_model=ClassOut)
+# def create_class(class_data: ClassCreate, db: Session = Depends(get_db)):
+     # 把 pydantic 对象转成字典，再传给 dao
+    # if not db_class:
+    #     raise HTTPException(status_code=404, detail="班级不存在")
+
+# 2. 获取班级列表
+@router.get("/", response_model=List[ClassOut])
+def read_classes(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
+    return wl_class_dao.get_classes(db, skip, limit)
+
+# 3. 获取单个班级详情
+@router.get("/{class_id}", response_model=ClassOut)
+def read_class(class_id: int, db: Session = Depends(get_db)):
+    db_class = wl_class_dao.get_class_by_id(db, class_id)
+    if not db_class:
+        raise HTTPException(status_code=404, detail="班级不存在")
+    return db_class
+
+# 4. 修改班级
+@router.put("/{class_id}", response_model=ClassOut)
+def update_class(class_id: int, class_data: ClassUpdate, db: Session = Depends(get_db)):
+    db_class = wl_class_dao.update_class(db, class_id, class_data.model_dump(exclude_unset=True))
+    if not db_class:
+        raise HTTPException(status_code=404, detail="班级不存在")
+    return db_class
+
+# 5. 删除班级（逻辑删除）
+@router.delete("/{class_id}")
+def delete_class(class_id: int, db: Session = Depends(get_db)):
+    # 直接把 dao 的结果返回给前端，前端根据 code 判断是否成功
+    return wl_class_dao.delete_class(db, class_id)