【苍穹外卖|Day4】套餐页面开发（新增套餐、分页查询、删除套餐、修改套餐、起售停售）

D4

本文记录「苍穹外卖」项目开发中的关键技术实践与踩坑思考，包含个人在实际开发中的具体过程 与遇到的问题 以及知识点总结
希望可以给一起学习的大家带来帮助

文章目录

- D4

1.新增套餐

1.1根据分类id查询菜品

1.DishController

java 复制代码

//根据分类id查询菜品
    @GetMapping("/list")
    public Result<List<Dish>> list(Long categoryId){
        log.info("根据分类id查询菜品：{}",categoryId);
        List<Dish> dishList = dishService.list(categoryId);
        return Result.success();
    }

2.DishServiceImpl

java 复制代码

//根据种类id查询菜品
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .build();
        List<Dish> dishList =  dishMapper.list(dish);
        return dishList;
    }

3.DishMapper

直接使用动态查询，以后相关查询都可以调用这个list方法

java 复制代码

//动态条件查询菜品
    List<Dish> list(Dish dish);

4.DishMapper.xml

xml 复制代码

<select id="list" resultType="com.sky.entity.Dish">
        select * from dish
        <where>
            <if test="name != null">and name like concat('%',#{name},'%')</if>
            <if test="categoryId != null">and category_id = #{categoryId}</if>
            <if test="status != null">and status = #{status}</if>
        </where>
        order by create_time desc
    </select>

1.2新增套餐

1.SetmealController

java 复制代码

//新增套餐
@PostMapping
public Result save(@RequestBody SetmealDTO setmealDTO){
    log.info("新增套餐：{}",setmealDTO);
    setmealService.save(setmealDTO);
    return Result.success();
}

2.SetmealServiceImpl

java 复制代码

//新增套餐
    @Transactional
    @Override
    public void save(SetmealDTO setmealDTO) {
        //插入套餐数据
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.insert(setmeal);

        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            //给套餐里的每个菜品设置套餐id
            setmealDish.setSetmealId(setmealId);
        });
        //插入套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);
    }

3.SetmealMapper

java 复制代码

/**
     * 新增套餐
     * @param setmeal
*/
@AutoFill(OperationType.INSERT)
void insert(Setmeal setmeal);

4.SetmealMapper.xml

xml 复制代码

<insert id="insert" parameterType="Setmeal" useGeneratedKeys="true" keyProperty="id">
    insert into setmeal
    (category_id, name, price, status, description, image, create_time, update_time, create_user, update_user)
    values (#{categoryId}, #{name}, #{price}, #{status}, #{description}, #{image}, #{createTime}, #{updateTime},
    #{createUser}, #{updateUser})
</insert>

5.SetmealDishMapper

java 复制代码

/**
     * 批量保存套餐和菜品的关联关系
     * @param setmealDishes
*/
void insertBatch(List<SetmealDish> setmealDishes);

6.SetmealDishMapper.xml

xml 复制代码

<insert id="insertBatch" parameterType="list">
    insert into setmeal_dish
    (setmeal_id,dish_id,name,price,copies)
    values
    <foreach collection="setmealDishes" item="sd" separator=",">
        (#{sd.setmealId},#{sd.dishId},#{sd.name},#{sd.price},#{sd.copies})
    </foreach>
</insert>

2.分页查询

1. SetmealController

java 复制代码

/**
     * 分页查询
     * @param setmealPageQueryDTO
     * @return
*/
@GetMapping("/page")
@ApiOperation("分页查询")
public Result<PageResult> page(SetmealPageQueryDTO setmealPageQueryDTO) {
    PageResult pageResult = setmealService.pageQuery(setmealPageQueryDTO);
    return Result.success(pageResult);
}

SetmealServiceImpl

java 复制代码

//分页查询
public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
    int pageNum = setmealPageQueryDTO.getPage();
    int pageSize = setmealPageQueryDTO.getPageSize();

    PageHelper.startPage(pageNum, pageSize);
    Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
    return new PageResult(page.getTotal(), page.getResult());
}

SetmealMapper

java 复制代码

//分页查询
Page<SetmealVO> pageQuery(SetmealPageQueryDTO setmealPageQueryDTO);

4.SetmealMapper.xml

xml 复制代码

<select id="pageQuery" resultType="com.sky.vo.SetmealVO">
    select
    	s.*,c.name categoryName
    from
    	setmeal s
    left join
    	category c
    on
    	s.category_id = c.id
    <where>
        <if test="name != null">
            and s.name like concat('%',#{name},'%')
        </if>
        <if test="status != null">
            and s.status = #{status}
        </if>
        <if test="categoryId != null">
            and s.category_id = #{categoryId}
        </if>
    </where>
    order by s.create_time desc
</select>

3.删除套餐

业务规则：

可以一次删除一个套餐，也可以批量删除套餐
起售中的套餐不能删除

SetmealController

java 复制代码

/**
     * 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

java 复制代码

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

SetmealServiceImpl

java 复制代码

/**
     * 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);
    });
}

4. SetmealMapper

java 复制代码

/**
     * 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

java 复制代码

/**
     * 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);

4.修改套餐

接口设计（共涉及到5个接口）：

根据id查询套餐
根据类型查询分类（已完成）
根据分类id查询菜品（已完成）
图片上传（已完成）
修改套餐

4.1根据id查询套餐及其菜品信息

controller层

java 复制代码

//根据id查询套餐以及相关菜品
    @GetMapping("/{id}")
    public Result<SetmealVO> getById(@PathVariable Long id){
        log.info("根据id查询套餐：{}",id);
        SetmealVO setmealVO = setmealService.getByIdWithDish(id);
        return Result.success(setmealVO);
    }

ServiceImpl

java 复制代码

//根据id查询套餐及其菜品信息
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        //获取套餐信息
        Setmeal setmeal = setmealMapper.getById(id);
        //获取相关菜品信息
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);

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

Mapper层

java 复制代码

//根据套餐id查询菜品
@Select("select * from setmeal_dish where setmeal_id = #{setmealId}")
List<SetmealDish> getBySetmealId(Long setmealId);

4.2修改套餐

Controller层

java 复制代码

//修改套餐
    @PutMapping
    public Result update(@RequestBody SetmealDTO setmealDTO){
        log.info("修改套餐：{}",setmealDTO);
        setmealService.update(setmealDTO);
        return Result.success();
    }

ServiceImpl

java 复制代码

//修改套餐
@Transactional
@Override
public void update(SetmealDTO setmealDTO) {
    //修改套餐信息
    Setmeal setmeal = new Setmeal();
    BeanUtils.copyProperties(setmealDTO,setmeal);
    setmealMapper.update(setmeal);

    //修改关联菜品信息-先删除再添加
    Long setmealId = setmeal.getId();
    setmealDishMapper.deleteBySetmealId(setmealId);

    List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
    setmealDishes.forEach(setmealDish -> {
        setmealDish.setSetmealId(setmealId);
    });
    setmealDishMapper.insertBatch(setmealDishes);
}

Mapper层

java 复制代码

//根据id修改套餐
@AutoFill(OperationType.UPDATE)
void update(Setmeal setmeal);

xml

java 复制代码

<update id="update">
        update setmeal
        <set>
            <if test="name != null">name = #{name},</if>
            <if test="categoryId != null">
                category_id = #{categoryId},
            </if>
            <if test="price != null">
                price = #{price},
            </if>
            <if test="status != null">
                status = #{status},
            </if>
            <if test="description != null">
                description = #{description},
            </if>
            <if test="image != null">
                image = #{image},
            </if>
            <if test="updateTime != null">
                update_time = #{updateTime},
            </if>
            <if test="updateUser != null">
                update_user = #{updateUser}
            </if>
        </set>
        where id = #{id}
    </update>

5.起售停售套餐

Controller层

java 复制代码

//起售停售
@PostMapping("/status/{status}")
public Result setStatus(@PathVariable Integer status,Long id){
    log.info("修改状态，套餐id为：{}",id);
    setmealService.setStatus(status,id);
    return Result.success();
}

ServiceImpl

java 复制代码

//起售停售
@Override
public void setStatus(Integer status, Long id) {
    //起售时，先判断套餐内是否有停售菜品
    if(status == StatusConstant.ENABLE){
        List<Dish> dishList = dishMapper.getBySetmealId(id);
        if(dishList != null && dishList.size() > 0){
            dishList.forEach(dish -> {
                if(StatusConstant.DISABLE == dish.getStatus()){
                    throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            });
        }
    }

    Setmeal setmeal = Setmeal.builder()
            .id(id)
            .status(status)
            .build();
    setmealMapper.update(setmeal);
}