diff --git a/resolvers/topics.py b/resolvers/topics.py
index 64104298..cc8c7d40 100644
--- a/resolvers/topics.py
+++ b/resolvers/topics.py
@@ -1,13 +1,12 @@
 from orm.topic import Topic, TopicFollower
 from services.zine.topics import TopicStorage
-from orm.shout import Shout
-from orm.user import User
 from services.stat.topicstat import TopicStat
 from base.orm import local_session
 from base.resolvers import mutation, query
 from auth.authenticate import login_required
 from sqlalchemy import and_
 import random
+from services.zine.shoutscache import ShoutsCache
 
 
 @query.field("topicsAll")
@@ -27,49 +26,45 @@ async def topics_by_community(_, info, community):
 
 
 @query.field("topicsByAuthor")
-async def topics_by_author(_, info, author):
-    slugs = set()
-    with local_session() as session:
-        shouts = session.query(Shout).filter(Shout.authors.any(User.slug == author))
-        for shout in shouts:
-            slugs.update([topic.slug for topic in shout.topics])
-    return await TopicStorage.get_topics(slugs)
+async def topics_by_author(_, _info, author):
+    topics = await ShoutsCache.get_shouts_by_author(author)
+    author_topics = set()
+    for tpc in topics:
+        tpc = await TopicStorage.topics[tpc.slug]
+        tpc.stat = await TopicStat.get_stat(tpc.slug)
+        author_topics.add(tpc)
+    return list(author_topics)
 
 
 @mutation.field("createTopic")
 @login_required
-async def create_topic(_, info, input):
-    new_topic = Topic.create(**input)
-    await TopicStorage.add_topic(new_topic)
-
+async def create_topic(_, _info, inp):
+    new_topic = Topic.create(**inp)
+    await TopicStorage.update_topic(new_topic)
     return {"topic": new_topic}
 
 
 @mutation.field("updateTopic")
 @login_required
-async def update_topic(_, info, input):
-    slug = input["slug"]
-
+async def update_topic(_, _info, inp):
+    slug = inp["slug"]
     session = local_session()
     topic = session.query(Topic).filter(Topic.slug == slug).first()
-
     if not topic:
         return {"error": "topic not found"}
-
-    topic.update(input)
+    topic.update(**inp)
     session.commit()
     session.close()
-
-    await TopicStorage.add_topic(topic)
-
+    await TopicStorage.update_topic(topic.slug)
     return {"topic": topic}
 
 
-def topic_follow(user, slug):
+async def topic_follow(user, slug):
     TopicFollower.create(follower=user.slug, topic=slug)
+    await TopicStorage.update_topic(slug)
 
 
-def topic_unfollow(user, slug):
+async def topic_unfollow(user, slug):
     with local_session() as session:
         sub = (
             session.query(TopicFollower)
@@ -80,8 +75,10 @@ def topic_unfollow(user, slug):
         )
         if not sub:
             raise Exception("[resolvers.topics] follower not exist")
-        session.delete(sub)
+        else:
+            session.delete(sub)
         session.commit()
+    await TopicStorage.update_topic(slug)
 
 
 @query.field("topicsRandom")
@@ -93,4 +90,5 @@ async def topics_random(_, info, amount=12):
         topic.stat = topic_stat
         if topic_stat["shouts"] > 2:
             normalized_topics.push(topic)
-    return random.sample(normalized_topics, k=min(len(normalized_topics), 12))
+    sample_length = min(len(normalized_topics), amount)
+    return random.sample(normalized_topics, sample_length)