删除套餐

---

需求分析

（1）可以一次删除一个套餐，也可以批量删除套餐

（2）起售中的套餐不能删除

SetmealController

/**
     * 批量删除套餐
     * @param ids
     * @return
*/
@DeleteMapping
@ApiOperation("批量删除套餐")
public Result delete(@RequestParam List<Long> ids){
    setmealService.deleteBatch(ids);
    return Result.success();
}

SetmealService

/**
     * 批量删除套餐
     * @param ids
*/
void deleteBatch(List<Long> ids);

SetmealServiceImpl

/**
     * 批量删除套餐
     * @param ids
*/
@Transactional
public void deleteBatch(List<Long> ids) {
    ids.forEach(id -> {
        Setmeal setmeal = setmealMapper.getById(id);
        if(StatusConstant.ENABLE == setmeal.getStatus()){
            //起售中的套餐不能删除
            throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
        }
    });

    ids.forEach(setmealId -> {
        //删除套餐表中的数据
        setmealMapper.deleteById(setmealId);
        //删除套餐菜品关系表中的数据
        setmealDishMapper.deleteBySetmealId(setmealId);
    });
}

SetmealMapper

/**
     * 根据id查询套餐
     * @param id
     * @return
*/
@Select("select * from setmeal where id = #{id}")
Setmeal getById(Long id);

/**
     * 根据id删除套餐
     * @param setmealId
*/
@Delete("delete from setmeal where id = #{id}")
void deleteById(Long setmealId);

SetmealDishMapper

/**
     * 根据套餐id删除套餐和菜品的关联关系
     * @param setmealId
*/
@Delete("delete from setmeal_dish where setmeal_id = #{setmealId}")
void deleteBySetmealId(Long setmealId);