删除菜品业务代码开发

sky-server/src/main/java/com/sky/controller/admin/DishController.java

@@ -3,16 +3,17 @@ package com.sky.controller.admin;
 
 import com.sky.constant.MessageConstant;
 import com.sky.dto.DishDTO;
+import com.sky.dto.DishPageQueryDTO;
+import com.sky.result.PageResult;
 import com.sky.result.Result;
 import com.sky.service.DishService;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.*;
-import org.springframework.web.bind.annotation.RequestBody;
+
-import org.springframework.web.bind.annotation.RequestMapping;
+import java.util.List;
-import org.springframework.web.bind.annotation.RestController;
 
 
 /**
@@ -42,4 +43,36 @@ public class DishController {
         dishService.saveWithFlavor(dishDTO);
         return Result.success();
     }
+
+
+    /**
+     * 菜品分页查询
+     * @param dishPageQueryDTO
+     * @return
+     */
+    @GetMapping("/page")
+    @ApiOperation("菜品分页查询")
+    public Result<PageResult> page(DishPageQueryDTO dishPageQueryDTO) {
+        log.info("菜品分页查询:{}", dishPageQueryDTO);
+
+        PageResult pageResult = dishService.pageQuery(dishPageQueryDTO);
+
+        return Result.success(pageResult);
+    }
+
+
+    /**
+     * 菜品批量删除
+     * @param ids
+     * @return
+     */
+    @DeleteMapping
+    @ApiOperation("菜品批量删除")
+    public Result delete(@RequestParam List<Long> ids){     //SpringMVC动态地将字符串解析成数字
+        log.info("菜品批量删除:{}", ids);
+
+        dishService.deleteBatch(ids);
+
+        return Result.success();
+    }
 }

sky-server/src/main/java/com/sky/mapper/DishFlavorMapper.java

@@ -2,6 +2,7 @@ package com.sky.mapper;
 
 
 import com.sky.entity.DishFlavor;
+import org.apache.ibatis.annotations.Delete;
 import org.apache.ibatis.annotations.Mapper;
 
 import java.util.List;
@@ -14,4 +15,12 @@ public interface DishFlavorMapper {
      * @param flavors
      */
     void insertBatch(List<DishFlavor> flavors);
+
+
+    /**
+     * 根据菜品id删除对应的口味数据
+     * @param dishId
+     */
+    @Delete("delete from dish_flavor where dish_id = #{dishId}")
+    void deleteByDishId(Long dishId);
 }

sky-server/src/main/java/com/sky/mapper/DishMapper.java

@@ -1,8 +1,12 @@
 package com.sky.mapper;
 
+import com.github.pagehelper.Page;
 import com.sky.annotation.AutoFill;
+import com.sky.dto.DishPageQueryDTO;
 import com.sky.entity.Dish;
 import com.sky.enumeration.OperationType;
+import com.sky.vo.DishVO;
+import org.apache.ibatis.annotations.Delete;
 import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Select;
 
@@ -24,4 +28,29 @@ public interface DishMapper {
      */
     @AutoFill(value = OperationType.INSERT)    //公共字段自动填充 不需要手动赋值
     void insert(Dish dish);
+
+
+    /**
+     * 菜品分页查询
+     * @param dishPageQueryDTO
+     * @return
+     */
+    Page<DishVO> pageQuery(DishPageQueryDTO dishPageQueryDTO);
+
+
+    /**
+     * 根据主键查询菜品
+     * @param id
+     * @return
+     */
+    @Select("select * from dish where id = #{id}")
+    Dish getById(Long id);
+
+
+    /**
+     * 根据主键删除菜品id
+     * @param id
+     */
+    @Delete("delete from dish where id = #{id}")
+    void deleteById(Long id);
 }

sky-server/src/main/java/com/sky/mapper/SetmealDishMapper.java

@@ -0,0 +1,18 @@
+package com.sky.mapper;
+
+
+import org.apache.ibatis.annotations.Mapper;
+
+import java.util.List;
+
+@Mapper
+public interface SetmealDishMapper {
+
+
+    /**
+     * 根据菜品id查询多个套餐id
+     * @param dishIds
+     * @return
+     */
+    List<Long> getSetmealIdsByDishIds(List<Long> dishIds);
+}

sky-server/src/main/java/com/sky/service/DishService.java

@@ -1,6 +1,10 @@
 package com.sky.service;
 
 import com.sky.dto.DishDTO;
+import com.sky.dto.DishPageQueryDTO;
+import com.sky.result.PageResult;
+
+import java.util.List;
 
 public interface DishService {
 
@@ -10,4 +14,19 @@ public interface DishService {
      * @param dishDTO
      */
     public void saveWithFlavor(DishDTO dishDTO);
+
+
+    /**
+     * 菜品分页查询
+     * @param dishPageQueryDTO
+     * @return
+     */
+    PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO);
+
+
+    /**
+     * 菜品批量删除
+     * @param ids
+     */
+    void deleteBatch(List<Long> ids);
 }

sky-server/src/main/java/com/sky/service/impl/DishServiceImpl.java

@@ -1,11 +1,20 @@
 package com.sky.service.impl;
 
+import com.github.pagehelper.Page;
+import com.github.pagehelper.PageHelper;
+import com.sky.constant.MessageConstant;
+import com.sky.constant.StatusConstant;
 import com.sky.dto.DishDTO;
+import com.sky.dto.DishPageQueryDTO;
 import com.sky.entity.Dish;
 import com.sky.entity.DishFlavor;
+import com.sky.exception.DeletionNotAllowedException;
 import com.sky.mapper.DishFlavorMapper;
 import com.sky.mapper.DishMapper;
+import com.sky.mapper.SetmealDishMapper;
+import com.sky.result.PageResult;
 import com.sky.service.DishService;
+import com.sky.vo.DishVO;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -20,10 +29,10 @@ public class DishServiceImpl implements DishService {
 
     @Autowired
     private DishMapper dishMapper;
-
-
     @Autowired
     private DishFlavorMapper dishFlavorMapper;
+    @Autowired
+    private SetmealDishMapper setmealDishMapper;
 
     /**
      * 新增菜品和对应的口味数据
@@ -53,4 +62,51 @@ public class DishServiceImpl implements DishService {
         }
 
     }
+
+
+    /**
+     * 菜品分页查询
+     * @param dishPageQueryDTO
+     * @return
+     */
+    @Override
+    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
+
+        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
+        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
+        return new PageResult(page.getTotal(), page.getResult());
+    }
+
+
+    /**
+     * 菜品批量删除
+     * @param ids
+     */
+    @Override
+    @Transactional      //涉及多个表的数据操作 开启事务注解  保持数据的一致性
+    public void deleteBatch(List<Long> ids) {
+        //判断当前菜品是否能够被删除  是否存在起售中的菜品
+        for (Long id : ids) {
+            Dish dish = dishMapper.getById(id);
+            if(dish.getStatus() == StatusConstant.ENABLE){
+                //当前菜品处于起售状态
+                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
+            }
+        }
+
+        //判断当前菜品是否能够被删除  是否被套餐关联
+        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
+        if (setmealIds != null && setmealIds.size() > 0) {
+            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
+        }
+
+        //删除菜品表中的菜品数据
+        for (Long id : ids) {
+            dishMapper.deleteById(id);
+            //删除菜品关联的口味数据
+            dishFlavorMapper.deleteByDishId(id);
+        }
+
+
+    }
 }

sky-server/src/main/resources/mapper/DishMapper.xml

@@ -9,4 +9,21 @@
         values
             (#{name}, #{categoryId}, #{price}, #{image}, #{description}, #{createTime}, #{updateTime}, #{createUser}, #{updateUser}, #{status})
     </insert>
+
+
+    <select id="pageQuery" resultType="com.sky.vo.DishVO">
+        select d.*, c.name as categoryName from dish d left outer join category c on d.category_id = c.id
+        <where>
+            <if test="name != null">
+                and d.name like concat('%', #{name}, '%')
+            </if>
+            <if test="categoryId != null">
+                and d.category_id = #{categoryId}
+            </if>
+            <if test="status != null">
+                and d.status = #{status}
+            </if>
+        </where>
+        order by d.create_time desc
+    </select>
 </mapper>

sky-server/src/main/resources/mapper/SetmealDishMapper.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
+<mapper namespace="com.sky.mapper.SetmealDishMapper">
+
+    <select id="getSetmealIdsByDishIds" resultType="java.lang.Long">
+        select setmeal_id from setmeal_dish where dish_id in
+        <foreach collection="dishIds" item="dishId" separator="," open="(" close=")">
+            #{dishId}
+        </foreach>
+
+    </select>
+</mapper>