瑞吉外卖09-菜品模块的CRUD与启售、停售

需求分析

我们先看看这个页面，剥离出本质其实就是CRUD！ 

这里面还有一个 “启售” 和 “停售”，在黑马视频中是没有的，我们这里也将其一起来实现一下！

这里我们基本上在前面都有讲过一些，所以这里就不做过多的分析了！

请求参数

菜品分页查询

新增菜品

删除菜品

菜品修改

根据ID查询菜品及菜品口味信息

修改菜品及菜品口味信息  

起售停售

代码实现 

Controller层

@RestController
@Slf4j
@RequestMapping("/dish")
public class DishController {
 
    @Autowired
    private DishService dishService;
 
    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R saveDishWithFlavor(@RequestBody DishDto dishDto) {
        return dishService.saveDishWithFlavor(dishDto);
    }
 
    /**
     * 菜品管理-分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R pageByDish(int page,int pageSize,String name) {
        return dishService.pageByDish(page, pageSize,name);
    }
 
    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R updateDishWithFlavor(@RequestBody DishDto dishDto) {
        return dishService.updateDishWithFlavor(dishDto);
    }
 
    /**
     * 根据id查询菜品信息与对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R getDishInfoById(@PathVariable Long id) {
        return dishService.getDishInfoById(id);
    }
 
    /**
     * 删除菜品
     * @param ids
     * @return
     *
     * @@RequestParam: 用于将请求参数区数据映射到功能处理方法的参数上
     */
    @DeleteMapping
    public R deleteDish(@RequestParam List ids) {
        log.info("ids:{}",ids);
        return dishService.deleteDish(ids);
    }
 
    /**
     * 起售菜品、停售菜品
     * @param status
     * @param ids
     * @return
     *
     * http://localhost:8080/dish/status/0?ids=1413384757047271425
     */
    @PostMapping("/status/{status}")
    public R sellStatus(@PathVariable("status") Integer status, @RequestParam List ids) {
        return dishService.sellStatus(status, ids);
    }
}

Service层

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl implements DishService {
 
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
 
    @Autowired
    private DishMapper dishMapper;
 
    @Autowired
    private CategoryMapper categoryMapper;
 
    @Autowired
    private DishFlavorService dishFlavorService;
 
    @Override
    @Transactional
    public R saveDishWithFlavor(DishDto dishDto) {
        this.save(dishDto);
 
        Long dishId = dishDto.getId();
 
        List flavors = dishDto.getFlavors();
        for (DishFlavor flavor : flavors) {
            flavor.setDishId(dishId);
            dishFlavorMapper.insert(flavor);
        }
 
        return R.success("新增菜品成功！");
    }
 
    @Override
    public R pageByDish(int page, int pageSize, String name) {
        Page pageInfo = new Page<>(page, pageSize);
        Page dishDtoPage = new Page<>();
 
        LambdaQueryWrapper lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.like(name != null, Dish::getName, name);
        lambdaQueryWrapper.orderByDesc(Dish::getUpdateTime);
        dishMapper.selectPage(pageInfo, lambdaQueryWrapper);
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");
 
        List records = pageInfo.getRecords();
 
        List collect = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();
            Category category = categoryMapper.selectById(categoryId);
 
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
 
            return dishDto;
        }).collect(Collectors.toList());
 
        dishDtoPage.setRecords(collect);
 
        return R.success(dishDtoPage);
    }
 
    @Override
    @Transactional
    public R updateDishWithFlavor(DishDto dishDto) {
        this.updateById(dishDto);
        LambdaQueryWrapper queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, dishDto.getId());
        dishFlavorMapper.delete(queryWrapper);
 
        List flavors = dishDto.getFlavors();
        for (DishFlavor flavor : flavors) {
            flavor.setDishId(dishDto.getId());
            dishFlavorMapper.insert(flavor);
        }
        return R.success("修改成功！");
    }
 
    @Override
    public R getDishInfoById(Long id) {
        Dish dish = this.getById(id);
 
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish, dishDto);
 
        LambdaQueryWrapper queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
 
        List flavors = dishFlavorMapper.selectList(queryWrapper);
        dishDto.setFlavors(flavors);
        return R.success(dishDto);
    }
 
    @Override
    @Transactional
    public R deleteDish(List ids) {
        // 查菜品的状态，是否可以删除（）
        LambdaQueryWrapper dishQueryWrapper = new LambdaQueryWrapper<>();
        dishQueryWrapper.in(Dish::getId, ids);
        dishQueryWrapper.eq(Dish::getStatus, 1);
 
        int count = this.count(dishQueryWrapper);
        if(count > 0) {
            throw new CustomException("菜品正在售卖中！不能删除！");
        }
 
        // 删除dish
        dishMapper.deleteBatchIds(ids);
 
        // 删除dish_flavor
        LambdaQueryWrapper dfQueryWrapper = new LambdaQueryWrapper<>();
        dfQueryWrapper.in(DishFlavor::getDishId, ids);
 
        dishFlavorMapper.delete(dfQueryWrapper);
        return R.success("删除菜品成功！");
    }
 
    @Override
    public R sellStatus(Integer status, List ids) {
        LambdaQueryWrapper queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(ids != null, Dish::getId, ids);
 
        List list = dishMapper.selectList(queryWrapper);
 
        for (Dish dish : list) {
            if (dish != null) {
                dish.setStatus(status);
                dishMapper.updateById(dish);
            }
        }
 
        return R.success("售卖状态修改成功");
    }
}

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