73 lines
3.7 KiB
Python
73 lines
3.7 KiB
Python
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# # api/c_lass.py
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# # 本文件定义班级的所有 API 路由（Controller 层）
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from fastapi import APIRouter, Depends, HTTPException, Query
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# APIRouter=创建路由，Depends=依赖注入，HTTPException=错误响应，Query=查询参数校验
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from sqlalchemy.orm import Session # 会话类型
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from database import get_db # 导入会话生成器
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from dao.c_lass import create_c_lass, get_c_lass, get_all_c_lass, update_c_lass, delete_c_lass
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# 把DAO层的5个函数都导入进来，接口里直接调用
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from scheme.c_lass import ClassCreate, ClassUpdate, ClassResponse
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# 路由对象，具体前缀（/c_lass）在 main.py 统一注册
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router = APIRouter()# 创建本模块的路由对象，main.py会把它注册进应用
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# ---------- 1. 新增班级 POST ----------
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# 完整地址：POST /c_lass/add
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@router.post("/add", response_model=ClassResponse, summary="新增班级")
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# 装饰器：注册一个POST接口，路径/add；response_model=返回时按ClassResponse格式化
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def add_c_lass(class_data: ClassCreate, db: Session = Depends(get_db)):
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# class_data: ClassCreate = FastAPI自动校验请求体并转成对象；db = FastAPI自动注入会话
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# 先查重：如果这个班级ID已经存在（包括逻辑删除的），进入if
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if get_c_lass(db, class_data.class_id):
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raise HTTPException(status_code=400, detail="该班级ID已存在，不能重复添加")
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return create_c_lass(db, class_data)# 通过查重，调DAO层真正插入，返回结果
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# ---------- 2. 根据id查询单个班级 GET ----------
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# 完整地址：GET /c_lass/{class_id}
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@router.get("/{class_id}", response_model=ClassResponse, summary="根据id查询班级")
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# GET接口，路径里带班级编号，如 GET /c_lass/101
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def get_class_by_id(class_id: int, db: Session = Depends(get_db)): # 调DAO查询
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db_class = get_c_lass(db, class_id)
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if not db_class:
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raise HTTPException(status_code=404, detail="该班级不存在") # 查不到就返回404，带提示信息
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return db_class
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# ---------- 3. 分页查询所有班级 GET ----------
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# 完整地址：GET /c_lass/?skip=0&limit=10
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@router.get("/", response_model=list[ClassResponse], summary="分页查询班级列表")
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# GET根路径，如 GET /c_lass/?skip=0&limit=10；response_model是列表
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def get_class_list(
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skip: int = Query(0, ge=0, description="跳过的记录数"), # 查询参数skip，默认0，必须≥0
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limit: int = Query(10, ge=1, le=200, description="每页最大记录数"), # 查询参数limit，默认10，范围1~200
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db: Session = Depends(get_db),
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):
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return get_all_c_lass(db, skip, limit) # 调DAO分页查询
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# ---------- 4. 修改班级 PUT ----------
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# 完整地址：PUT /c_lass/{class_id}
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@router.put("/{class_id}/", response_model=ClassResponse, summary="修改班级信息")
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def update_class(class_id: int, update_data: ClassUpdate, db: Session = Depends(get_db)):
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# def update_class(class_id: int, start_time: date, db: Session = Depends(get_db)):
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if not get_c_lass(db, class_id): # 先确认要改的班级存在（存在且没删）
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raise HTTPException(status_code=404, detail="要修改的班级不存在")
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return update_c_lass(db, class_id, update_data) # 调DAO执行局部更新
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# ---------- 5. 删除班级 DELETE ----------
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# 完整地址：DELETE /c_lass/{class_id}
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@router.delete("/{class_id}", summary="删除班级")
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def delete_class(class_id: int, db: Session = Depends(get_db)):
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if not delete_c_lass(db, class_id):
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raise HTTPException(status_code=404, detail="该班级不存在")
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# 删除失败（查不到）返回404
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return {"message": "删除成功"}
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#API 层只做三件事—— 接请求、校验 / 查重、调 DAO，自己不写 SQL
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