取消喜爱功能

Author: WxrLZQ

springboot-dubbo-api/src/main/java/com/lzq/api/pojo/Favorites.java

@@ -2,6 +2,7 @@
 
 import com.baomidou.mybatisplus.annotation.FieldFill;
 import com.baomidou.mybatisplus.annotation.TableField;
+import com.baomidou.mybatisplus.annotation.TableId;
 import com.baomidou.mybatisplus.annotation.TableName;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
@@ -24,13 +25,13 @@ public class Favorites implements Serializable {
     /**
      * 用户名
      */
-    @TableField("username")
+    @TableId("username")
     @JsonProperty("username")
     private String username;
     /**
      * 实例id
      */
-    @TableField("example_id")
+    @TableId("example_id")
     @JsonProperty("exampleId")
     private String exampleId;
     /**

springboot-dubbo-api/src/main/java/com/lzq/api/service/FavoritesService.java

@@ -16,6 +16,13 @@ public interface FavoritesService {
      */
     Boolean addFavorites(Favorites favorites);
 
+    /**
+     * 取消喜爱
+     * @param favorites
+     * @return
+     */
+    Boolean cancelFavorites(Favorites favorites);
+
     /**
      * 删除喜爱（物理）
      * @param exampleId

springboot-dubbo-service/src/main/java/com/lzq/dubboservice/service/FavoritesServiceImpl.java

@@ -5,6 +5,7 @@
 import com.lzq.api.pojo.Example;
 import com.lzq.api.pojo.Favorites;
 import com.lzq.api.service.FavoritesService;
+import com.lzq.dubboservice.mapper.AccountMapper;
 import com.lzq.dubboservice.mapper.ExampleMapper;
 import com.lzq.dubboservice.mapper.FavoritesMapper;
 import org.apache.dubbo.config.annotation.Service;
@@ -25,12 +26,13 @@ public class FavoritesServiceImpl extends ServiceImpl<FavoritesMapper, Favorites
     @Resource
     private ExampleMapper exampleMapper;
 
+
     @Override
     @Transactional(rollbackFor = Exception.class)
     public Boolean addFavorites(Favorites favorites) {
-        int i = baseMapper.insert(favorites);
+        Boolean insert = baseMapper.insert(favorites) > 0 ? true : false;
         int i1 = 0;
-        if (i > 0) {
+        if (insert) {
             do {
                 //用来查询关注人
                 QueryWrapper<Example> wrapper = new QueryWrapper<>();
@@ -47,6 +49,31 @@ public Boolean addFavorites(Favorites favorites) {
         }
     }
 
+    @Override
+    public Boolean cancelFavorites(Favorites favorites) {
+        //先删除
+        QueryWrapper<Favorites> wrapper = new QueryWrapper<>();
+        wrapper.eq("username", favorites.getUsername());
+        wrapper.eq("exampleId", favorites.getExampleId());
+        Boolean delete = baseMapper.delete(wrapper) > 0 ? true : false;
+        int i1 = 0;
+        if (delete) {
+            do {
+                //用来查询关注人
+                QueryWrapper<Example> exampleQueryWrapper = new QueryWrapper<>();
+                wrapper.eq("example_id", favorites.getExampleId());
+                //获取喜爱的用例
+                Example example = exampleMapper.selectOne(exampleQueryWrapper);
+                example.setFavorites(example.getFavorites() - 1);
+                //更新喜爱人数
+                i1 = exampleMapper.update(example, exampleQueryWrapper);
+            } while (i1 == 0);
+            return true;
+        }else {
+            return false;
+        }
+    }
+
     @Override
     public void deleteFavorites(String exampleId) {
         baseMapper.deleteFavorites(exampleId);
@@ -55,7 +82,7 @@ public void deleteFavorites(String exampleId) {
     @Override
     public Integer getCount(String username) {
         QueryWrapper<Favorites> wrapper = new QueryWrapper<>();
-        wrapper.eq("username",username);
+        wrapper.eq("username", username);
         return baseMapper.selectCount(wrapper);
     }
 }

springboot-dubbo-service/src/main/resources/mapper/FavoritesMapper.xml

@@ -2,6 +2,7 @@
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 <mapper namespace="com.lzq.dubboservice.mapper.FavoritesMapper">
 
+    <!--删除实例的时候同时删除掉喜爱表中所有该实例的数据-->
     <delete id="deleteFavorites">
         delete from favorites where example_id=#{exampleId}
     </delete>