update

search/views/topic.py

@@ -160,7 +160,8 @@ def get_home_recommend_topic_ids(user_id, device_id, tag_id, offset, size, query
         #         topic_id_list.extend(recommend_topic_list[3:6])
         # else:
         #     topic_id_list.extend(rank_topic_id_list)
-
+        if have_read_topic_id_list == None:
+            have_read_topic_id_list = list()
         have_read_topic_id_list.extend(rank_topic_id_list)
         if len(have_read_topic_id_list) > 30000:
             cut_len = len(have_read_topic_id_list)-30000