redis-set-set-fix

resolvers/author.py

@@ -305,7 +305,8 @@ async def get_author_followers(_, _info, slug: str):
         author_alias = aliased(Author)
         author_query = select(author_alias).filter(author_alias.slug == slug)
         result = local_session().execute(author_query).first()
-
+        followers = []
+        if result:
             [author] = result
             author_id = author.id
             cached = await redis.execute("GET", f"author:{author_id}:followers")
@@ -333,15 +334,15 @@ async def get_author_followers(_, _info, slug: str):
                     Author.id != author_id,  # exclude the author from the followers
                 ),
             )
-        results = get_with_stat(q)
-        if isinstance(results, list):
-            followers_ids = [r.id for r in results]
-            for follower in results:
+            followers = get_with_stat(q)
+            if isinstance(followers, list):
+                followers_ids = [r.id for r in followers]
+                for follower in followers:
                     if follower.id not in followers_ids:
                         await cache_follow_author_change(follower.dict(), author.dict())
                     followers_ids.append(follower.id)
-            logger.debug(f"@{slug} cache updated with {len(results)} followers")
-        return results
+                logger.debug(f"@{slug} cache updated with {len(followers)} followers")
+        return followers
     except Exception as exc:
         import traceback
 

services/cache.py

@@ -164,7 +164,6 @@ async def cache_topic(topic_dict: dict):
             follower_follows_topics.append(topic_dict)
 
         await redis.execute(
-            "SET",
             "SET",
             f"author:{follower_id}:follows-topics",
             json.dumps(follower_follows_topics, cls=CustomJSONEncoder),