黑马程序员Java项目实战《瑞吉外卖》，轻松掌握springboot + myb

批量启售停售，批量删除

@PostMapping("/status/{status}")
public R<String> updateDishStatus(@PathVariable("status") Integer status, @RequestParam("ids") List<Long> ids) {
//        List<Dish> dishes = dishService.listByIds(ids);
//        for (Dish dish : dishes) {
//            dish.setStatus(status);
//        }
    List<Dish> dishes = new ArrayList<>();
    for (Long id : ids) {
        Dish dish = new Dish();
        dish.setId(id);
        dish.setStatus(status);
        dishes.add(dish);
    }
    dishService.updateBatchById(dishes);
    return R.success("启售/停售菜品成功");
}

@DeleteMapping
public R<String> deleteDish(@RequestParam("ids") List<Long> ids) {
    dishService.deleteWithFlavor(ids);
    return R.success("删除菜品成功");
}

@Override
@Transactional
public void deleteWithSetmealDish(List<Long> ids) {
    LambdaQueryWrapper<Setmeal> lqw = new LambdaQueryWrapper<>();
    lqw.in(Setmeal::getId, ids);
    lqw.eq(Setmeal::getStatus, 1);
    int count = count(lqw);
    if (count > 0) {
        throw new CustomException("套餐正在售卖中，不能删除");
    }

    removeByIds(ids);
    LambdaQueryWrapper<SetmealDish> lqw1 = new LambdaQueryWrapper<>();
    lqw1.in(SetmealDish::getSetmealId, ids);
    setmealDishService.remove(lqw1);
}