修复我关注的话题和话题的关注列表

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

@@ -16,6 +16,7 @@ import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.springframework.util.CollectionUtils;
 
 import java.util.Collection;
 import java.util.List;
@@ -124,8 +125,13 @@ public class TopicServiceImpl extends ServiceImpl<TopicMapper, Topic> implements
                 .map(TopicFollow::getTopicId)
                 .collect(Collectors.toList());
 
-        // 3. 通过话题id批量查询用户
-        List<Topic> topics = listByIds(topicIds);
+        // 3. 通过话题id批量查询话题
+        List<Topic> topics;
+        if (!CollectionUtils.isEmpty(topicIds)) {
+            topics = listByIds(topicIds);
+        } else {
+            topics = List.of();
+        }
 
         // 5.构造分页结果
         IPage<Topic> userPage = new Page<>();
@@ -156,7 +162,12 @@ public class TopicServiceImpl extends ServiceImpl<TopicMapper, Topic> implements
                 .collect(Collectors.toList());
 
         // 3. 通过用户id批量查询用户
-        List<User> followers = userService.listByIds(followerIds);
+        List<User> followers;
+        if (!CollectionUtils.isEmpty(followerIds)) {
+            followers = userService.listByIds(followerIds);
+        } else {
+            followers = List.of();
+        }
 
         // 4.去除敏感信息
         followers.stream()