修改套餐

---

SetmealController

/**
     * 根据id查询套餐，用于修改页面回显数据
     *
     * @param id
     * @return
*/
@GetMapping("/{id}")
@ApiOperation("根据id查询套餐")
public Result<SetmealVO> getById(@PathVariable Long id) {
    SetmealVO setmealVO = setmealService.getByIdWithDish(id);
    return Result.success(setmealVO);
}

/**
     * 修改套餐
     *
     * @param setmealDTO
     * @return
*/
@PutMapping
@ApiOperation("修改套餐")
public Result update(@RequestBody SetmealDTO setmealDTO) {
    setmealService.update(setmealDTO);
    return Result.success();
}

SetmealService

/**
     * 根据id查询套餐和关联的菜品数据
     * @param id
     * @return
*/
SetmealVO getByIdWithDish(Long id);

/**
     * 修改套餐
     * @param setmealDTO
*/
void update(SetmealDTO setmealDTO);

SetmealServiceImpl

/**
     * 根据id查询套餐和套餐菜品关系
     *
     * @param id
     * @return
*/
public SetmealVO getByIdWithDish(Long id) {
    Setmeal setmeal = setmealMapper.getById(id);
    List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);

    SetmealVO setmealVO = new SetmealVO();
    BeanUtils.copyProperties(setmeal, setmealVO);
    setmealVO.setSetmealDishes(setmealDishes);

    return setmealVO;
}

/**
     * 修改套餐
     *
     * @param setmealDTO
*/
@Transactional
public void update(SetmealDTO setmealDTO) {
    Setmeal setmeal = new Setmeal();
    BeanUtils.copyProperties(setmealDTO, setmeal);

    //1、修改套餐表，执行update
    setmealMapper.update(setmeal);

    //套餐id
    Long setmealId = setmealDTO.getId();

    //2、删除套餐和菜品的关联关系，操作setmeal_dish表，执行delete
    setmealDishMapper.deleteBySetmealId(setmealId);

    List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
    setmealDishes.forEach(setmealDish -> {
        setmealDish.setSetmealId(setmealId);
    });
    //3、重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
    setmealDishMapper.insertBatch(setmealDishes);
}

SetmealDishMapper

	/**
     * 根据套餐id查询套餐和菜品的关联关系
     * @param setmealId
     * @return
     */
    @Select("select * from setmeal_dish where setmeal_id = #{setmealId}")
    List<SetmealDish> getBySetmealId(Long setmealId);