发布博客时判断标签和话题是否存在，并更新话题引用次数

src/main/java/cn/meteor/beyondclouds/modules/blog/service/impl/BlogServiceImpl.java

@@ -12,7 +12,9 @@ import cn.meteor.beyondclouds.modules.blog.exception.BlogCategoryServiceExceptio
 import cn.meteor.beyondclouds.modules.blog.exception.BlogServiceException;
 import cn.meteor.beyondclouds.modules.blog.mapper.BlogMapper;
 import cn.meteor.beyondclouds.modules.blog.service.*;
+import cn.meteor.beyondclouds.modules.tag.entity.Tag;
 import cn.meteor.beyondclouds.modules.tag.service.ITagService;
+import cn.meteor.beyondclouds.modules.topic.entity.Topic;
 import cn.meteor.beyondclouds.modules.topic.entity.TopicReference;
 import cn.meteor.beyondclouds.modules.topic.service.ITopicReferenceService;
 import cn.meteor.beyondclouds.modules.topic.service.ITopicService;
@@ -24,6 +26,7 @@ import lombok.extern.java.Log;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.Assert;
 import org.springframework.util.CollectionUtils;
 import org.springframework.util.StringUtils;
@@ -84,6 +87,7 @@ public class BlogServiceImpl extends ServiceImpl<BlogMapper, Blog> implements IB
      * @throws BlogCategoryServiceException
      */
     @Override
+    @Transactional(rollbackFor = Exception.class)
     public void publishBlog(Blog blog, String content, List<String> topicIds, List<String> tagIds) throws BlogCategoryServiceException {
 
         //如果为不可查看则默认为不可评论和转载
@@ -111,23 +115,33 @@ public class BlogServiceImpl extends ServiceImpl<BlogMapper, Blog> implements IB
 
         //4.判断是否引用话题
         if (!CollectionUtils.isEmpty(topicIds)) {
+            // 获取要引用的话题，不正确的话题ID会被自动过滤
+            List<Topic> topicList = topicService.listByIds(topicIds);
+            List<String> existsTopicIds = topicList.stream().map(Topic::getTopicId).collect(Collectors.toList());
+            if (!CollectionUtils.isEmpty(existsTopicIds)) {
                 List<TopicReference> topicReferenceList = new ArrayList<>();
-            for (String topicId : topicIds) {
+                for (String topicId : existsTopicIds) {
                     TopicReference topicReference = new TopicReference();
                     topicReference.setTopicId(topicId);
                     topicReference.setReferencerId(blog.getBlogId());
                     topicReference.setReferencerType(0);
                     topicReferenceList.add(topicReference);
                 }
-
                 // 批量保存
                 topicReferenceService.saveBatch(topicReferenceList);
+                // 更新话题引用次数
+                existsTopicIds.forEach(topicId -> {
+                    topicService.increaseReferenceCount(topicId, 1);
+                });
+            }
         }
 
         //5.判断是否引用标签
         if (!CollectionUtils.isEmpty(tagIds)) {
+            List<String> existsTagIds = tagService.listByIds(tagIds).stream().map(Tag::getTagId).collect(Collectors.toList());
+            if (!CollectionUtils.isEmpty(existsTagIds)) {
                 List<BlogTag> blogTagList = new ArrayList<>();
-            for (String tagId : tagIds) {
+                for (String tagId : existsTagIds) {
                     BlogTag blogTag = new BlogTag();
                     blogTag.setBlogId(blog.getBlogId());
                     blogTag.setTagId(tagId);
@@ -136,6 +150,7 @@ public class BlogServiceImpl extends ServiceImpl<BlogMapper, Blog> implements IB
                 blogTagService.saveBatch(blogTagList);
             }
         }
+    }
 
     /**
      * 删除博客

src/main/java/cn/meteor/beyondclouds/modules/topic/service/ITopicService.java

@@ -64,5 +64,19 @@ public interface ITopicService extends IService<Topic> {
      */
     IPage<User> getTopicsFollower(Integer page, Integer size, String topicId);
 
+    /**
+     * 获取话题分页
+     * @param page
+     * @param size
+     * @param userId
+     * @return
+     */
     IPage<Topic> getTopicPage(Integer page, Integer size, String userId);
+
+    /**
+     * 增加话题引用次数
+     * @param topicId
+     * @param count
+     */
+    void increaseReferenceCount(String topicId, int count);
 }

src/main/java/cn/meteor/beyondclouds/modules/topic/service/impl/TopicServiceImpl.java

@@ -185,5 +185,13 @@ public class TopicServiceImpl extends ServiceImpl<TopicMapper, Topic> implements
         return page(page, topicQueryWrapper);
     }
 
+    @Override
+    public void increaseReferenceCount(String topicId, int count) {
+        Topic topic = getById(topicId);
+        if (null != topic) {
+            topic.setReferenceCount(topic.getReferenceCount() + count);
+            updateById(topic);
+        }
+    }
 
 }