Merge branch '178-performance-hot-topics' into 'master'

Resolve "Performance HotTopics(APIView)"

Closes #178

See merge request !264

articles/views.py

@@ -840,9 +840,9 @@ def get_tag_count(tag_count, tags_dict, tag, att):
     :param tag: specific Tag object for which the article count should be retrieved
     :param att: name of the tag_count attribute which should be updated
     """
-    filtered_week_days = list(filter(lambda t: t.name == tag.name, tags_dict.all()))  # search for tag.name in list
-    if len(filtered_week_days) > 0:
-        tag_count[att] = filtered_week_days[0].article_count
+    tag_in_list = tags_dict.filter(id=tag.id)
+    if len(tag_in_list) > 0:
+        tag_count[att] = tag_in_list[0].article_count
 
 
 def get_filtered_tags(interval_date_start, interval_date_end):