A first pass at using materialized views.

server/.gitignore

@@ -3,3 +3,4 @@
 .idea
 env_setup.sh
 query_testing/*.json
+query_testing/*.json.old

server/migrations/2020-01-13-025151_create_materialized_views/down.sql

@@ -0,0 +1,223 @@
+-- functions and triggers
+drop trigger refresh_user on user_;
+drop function refresh_user();
+drop trigger refresh_post on post;
+drop function refresh_post();
+drop trigger refresh_post_like on post_like;
+drop function refresh_post_like();
+drop trigger refresh_community on community;
+drop function refresh_community();
+drop trigger refresh_community_follower on community_follower;
+drop function refresh_community_follower();
+drop trigger refresh_community_user_ban on community_user_ban;
+drop function refresh_community_user_ban();
+drop trigger refresh_comment on comment;
+drop function refresh_comment();
+drop trigger refresh_comment_like on comment_like;
+drop function refresh_comment_like();
+
+-- post
+-- Recreate the view
+drop view post_view;
+create view post_view as
+with all_post as
+(
+  select        
+  p.*,
+  (select u.banned from user_ u where p.creator_id = u.id) as banned,
+  (select cb.id::bool from community_user_ban cb where p.creator_id = cb.user_id and p.community_id = cb.community_id) as banned_from_community,
+  (select name from user_ where p.creator_id = user_.id) as creator_name,
+  (select avatar from user_ where p.creator_id = user_.id) as creator_avatar,
+  (select name from community where p.community_id = community.id) as community_name,
+  (select removed from community c where p.community_id = c.id) as community_removed,
+  (select deleted from community c where p.community_id = c.id) as community_deleted,
+  (select nsfw from community c where p.community_id = c.id) as community_nsfw,
+  (select count(*) from comment where comment.post_id = p.id) as number_of_comments,
+  coalesce(sum(pl.score), 0) as score,
+  count (case when pl.score = 1 then 1 else null end) as upvotes,
+  count (case when pl.score = -1 then 1 else null end) as downvotes,
+  hot_rank(coalesce(sum(pl.score) , 0), p.published) as hot_rank
+  from post p
+  left join post_like pl on p.id = pl.post_id
+  group by p.id
+)
+
+select
+ap.*,
+u.id as user_id,
+coalesce(pl.score, 0) as my_vote,
+(select cf.id::bool from community_follower cf where u.id = cf.user_id and cf.community_id = ap.community_id) as subscribed,
+(select pr.id::bool from post_read pr where u.id = pr.user_id and pr.post_id = ap.id) as read,
+(select ps.id::bool from post_saved ps where u.id = ps.user_id and ps.post_id = ap.id) as saved
+from user_ u
+cross join all_post ap
+left join post_like pl on u.id = pl.user_id and ap.id = pl.post_id
+
+union all
+
+select 
+ap.*,
+null as user_id,
+null as my_vote,
+null as subscribed,
+null as read,
+null as saved
+from all_post ap
+;
+
+drop view post_mview;
+drop materialized view post_aggregates_mview;
+drop view post_aggregates_view;
+
+-- user
+drop materialized view user_mview;
+drop view user_view;
+create view user_view as 
+select id,
+name,
+avatar,
+email,
+fedi_name,
+admin,
+banned,
+show_avatars,
+send_notifications_to_email,
+published,
+(select count(*) from post p where p.creator_id = u.id) as number_of_posts,
+(select coalesce(sum(score), 0) from post p, post_like pl where u.id = p.creator_id and p.id = pl.post_id) as post_score,
+(select count(*) from comment c where c.creator_id = u.id) as number_of_comments,
+(select coalesce(sum(score), 0) from comment c, comment_like cl where u.id = c.creator_id and c.id = cl.comment_id) as comment_score
+from user_ u;
+
+-- community
+drop view community_mview;
+drop materialized view community_aggregates_mview;
+drop view community_view;
+drop view community_aggregates_view;
+create view community_view as 
+with all_community as
+(
+  select *,
+  (select name from user_ u where c.creator_id = u.id) as creator_name,
+  (select avatar from user_ u where c.creator_id = u.id) as creator_avatar,
+  (select name from category ct where c.category_id = ct.id) as category_name,
+  (select count(*) from community_follower cf where cf.community_id = c.id) as number_of_subscribers,
+  (select count(*) from post p where p.community_id = c.id) as number_of_posts,
+  (select count(*) from comment co, post p where c.id = p.community_id and p.id = co.post_id) as number_of_comments,
+  hot_rank((select count(*) from community_follower cf where cf.community_id = c.id), c.published) as hot_rank
+  from community c
+)
+
+select
+ac.*,
+u.id as user_id,
+(select cf.id::boolean from community_follower cf where u.id = cf.user_id and ac.id = cf.community_id) as subscribed
+from user_ u
+cross join all_community ac
+
+union all
+
+select 
+ac.*,
+null as user_id,
+null as subscribed
+from all_community ac
+;
+
+-- reply and comment view
+drop view reply_view;
+drop view user_mention_view;
+drop view comment_view;
+drop view comment_mview;
+drop materialized view comment_aggregates_mview;
+drop view comment_aggregates_view;
+create view comment_view as
+with all_comment as
+(
+  select        
+  c.*,
+  (select community_id from post p where p.id = c.post_id),
+  (select u.banned from user_ u where c.creator_id = u.id) as banned,
+  (select cb.id::bool from community_user_ban cb, post p where c.creator_id = cb.user_id and p.id = c.post_id and p.community_id = cb.community_id) as banned_from_community,
+  (select name from user_ where c.creator_id = user_.id) as creator_name,
+  (select avatar from user_ where c.creator_id = user_.id) as creator_avatar,
+  coalesce(sum(cl.score), 0) as score,
+  count (case when cl.score = 1 then 1 else null end) as upvotes,
+  count (case when cl.score = -1 then 1 else null end) as downvotes
+  from comment c
+  left join comment_like cl on c.id = cl.comment_id
+  group by c.id
+)
+
+select
+ac.*,
+u.id as user_id,
+coalesce(cl.score, 0) as my_vote,
+(select cs.id::bool from comment_saved cs where u.id = cs.user_id and cs.comment_id = ac.id) as saved
+from user_ u
+cross join all_comment ac
+left join comment_like cl on u.id = cl.user_id and ac.id = cl.comment_id
+
+union all
+
+select 
+    ac.*,
+    null as user_id, 
+    null as my_vote,
+    null as saved
+from all_comment ac
+;
+
+create view reply_view as 
+with closereply as (
+    select 
+    c2.id, 
+    c2.creator_id as sender_id, 
+    c.creator_id as recipient_id
+    from comment c
+    inner join comment c2 on c.id = c2.parent_id
+    where c2.creator_id != c.creator_id
+    -- Do union where post is null
+    union
+    select
+    c.id,
+    c.creator_id as sender_id,
+    p.creator_id as recipient_id
+    from comment c, post p
+    where c.post_id = p.id and c.parent_id is null and c.creator_id != p.creator_id
+)
+select cv.*,
+closereply.recipient_id
+from comment_view cv, closereply
+where closereply.id = cv.id
+;
+
+-- user mention
+create view user_mention_view as
+select 
+    c.id,
+    um.id as user_mention_id,
+    c.creator_id,
+    c.post_id,
+    c.parent_id,
+    c.content,
+    c.removed,
+    um.read,
+    c.published,
+    c.updated,
+    c.deleted,
+    c.community_id,
+    c.banned,
+    c.banned_from_community,
+    c.creator_name,
+    c.creator_avatar,
+    c.score,
+    c.upvotes,
+    c.downvotes,
+    c.user_id,
+    c.my_vote,
+    c.saved,
+    um.recipient_id
+from user_mention um, comment_view c
+where um.comment_id = c.id;
+

server/migrations/2020-01-13-025151_create_materialized_views/up.sql

@@ -0,0 +1,437 @@
+-- post
+create view post_aggregates_view as
+select        
+p.*,
+(select u.banned from user_ u where p.creator_id = u.id) as banned,
+(select cb.id::bool from community_user_ban cb where p.creator_id = cb.user_id and p.community_id = cb.community_id) as banned_from_community,
+(select name from user_ where p.creator_id = user_.id) as creator_name,
+(select avatar from user_ where p.creator_id = user_.id) as creator_avatar,
+(select name from community where p.community_id = community.id) as community_name,
+(select removed from community c where p.community_id = c.id) as community_removed,
+(select deleted from community c where p.community_id = c.id) as community_deleted,
+(select nsfw from community c where p.community_id = c.id) as community_nsfw,
+(select count(*) from comment where comment.post_id = p.id) as number_of_comments,
+coalesce(sum(pl.score), 0) as score,
+count (case when pl.score = 1 then 1 else null end) as upvotes,
+count (case when pl.score = -1 then 1 else null end) as downvotes,
+hot_rank(coalesce(sum(pl.score) , 0), p.published) as hot_rank
+from post p
+left join post_like pl on p.id = pl.post_id
+group by p.id;
+
+create materialized view post_aggregates_mview as select * from post_aggregates_view;
+
+create unique index idx_post_aggregates_mview_id on post_aggregates_mview (id);
+
+drop view post_view;
+create view post_view as 
+with all_post as (
+  select
+  pa.*
+  from post_aggregates_view pa
+)
+select
+ap.*,
+u.id as user_id,
+coalesce(pl.score, 0) as my_vote,
+(select cf.id::bool from community_follower cf where u.id = cf.user_id and cf.community_id = ap.community_id) as subscribed,
+(select pr.id::bool from post_read pr where u.id = pr.user_id and pr.post_id = ap.id) as read,
+(select ps.id::bool from post_saved ps where u.id = ps.user_id and ps.post_id = ap.id) as saved
+from user_ u
+cross join all_post ap
+left join post_like pl on u.id = pl.user_id and ap.id = pl.post_id
+
+union all
+
+select 
+ap.*,
+null as user_id,
+null as my_vote,
+null as subscribed,
+null as read,
+null as saved
+from all_post ap
+;
+
+create view post_mview as 
+with all_post as (
+  select
+  pa.*
+  from post_aggregates_mview pa
+)
+select
+ap.*,
+u.id as user_id,
+coalesce(pl.score, 0) as my_vote,
+(select cf.id::bool from community_follower cf where u.id = cf.user_id and cf.community_id = ap.community_id) as subscribed,
+(select pr.id::bool from post_read pr where u.id = pr.user_id and pr.post_id = ap.id) as read,
+(select ps.id::bool from post_saved ps where u.id = ps.user_id and ps.post_id = ap.id) as saved
+from user_ u
+cross join all_post ap
+left join post_like pl on u.id = pl.user_id and ap.id = pl.post_id
+
+union all
+
+select 
+ap.*,
+null as user_id,
+null as my_vote,
+null as subscribed,
+null as read,
+null as saved
+from all_post ap
+;
+
+
+-- user_view
+drop view user_view;
+create view user_view as 
+select 
+u.id,
+u.name,
+u.avatar,
+u.email,
+u.fedi_name,
+u.admin,
+u.banned,
+u.show_avatars,
+u.send_notifications_to_email,
+u.published,
+(select count(*) from post p where p.creator_id = u.id) as number_of_posts,
+(select coalesce(sum(score), 0) from post p, post_like pl where u.id = p.creator_id and p.id = pl.post_id) as post_score,
+(select count(*) from comment c where c.creator_id = u.id) as number_of_comments,
+(select coalesce(sum(score), 0) from comment c, comment_like cl where u.id = c.creator_id and c.id = cl.comment_id) as comment_score
+from user_ u;
+
+create materialized view user_mview as select * from user_view;
+
+create unique index idx_user_mview_id on user_mview (id);
+
+-- community
+create view community_aggregates_view as
+select c.*,
+(select name from user_ u where c.creator_id = u.id) as creator_name,
+(select avatar from user_ u where c.creator_id = u.id) as creator_avatar,
+(select name from category ct where c.category_id = ct.id) as category_name,
+(select count(*) from community_follower cf where cf.community_id = c.id) as number_of_subscribers,
+(select count(*) from post p where p.community_id = c.id) as number_of_posts,
+(select count(*) from comment co, post p where c.id = p.community_id and p.id = co.post_id) as number_of_comments,
+hot_rank((select count(*) from community_follower cf where cf.community_id = c.id), c.published) as hot_rank
+from community c;
+
+create materialized view community_aggregates_mview as select * from community_aggregates_view;
+
+create unique index idx_community_aggregates_mview_id on community_aggregates_mview (id);
+
+drop view community_view;
+create view community_view as
+with all_community as
+(
+  select
+  ca.*
+  from community_aggregates_view ca
+)
+
+select
+ac.*,
+u.id as user_id,
+(select cf.id::boolean from community_follower cf where u.id = cf.user_id and ac.id = cf.community_id) as subscribed
+from user_ u
+cross join all_community ac
+
+union all
+
+select 
+ac.*,
+null as user_id,
+null as subscribed
+from all_community ac
+;
+
+create view community_mview as
+with all_community as
+(
+  select
+  ca.*
+  from community_aggregates_mview ca
+)
+
+select
+ac.*,
+u.id as user_id,
+(select cf.id::boolean from community_follower cf where u.id = cf.user_id and ac.id = cf.community_id) as subscribed
+from user_ u
+cross join all_community ac
+
+union all
+
+select 
+ac.*,
+null as user_id,
+null as subscribed
+from all_community ac
+;
+
+
+-- reply and comment view
+create view comment_aggregates_view as
+select        
+c.*,
+(select community_id from post p where p.id = c.post_id),
+(select u.banned from user_ u where c.creator_id = u.id) as banned,
+(select cb.id::bool from community_user_ban cb, post p where c.creator_id = cb.user_id and p.id = c.post_id and p.community_id = cb.community_id) as banned_from_community,
+(select name from user_ where c.creator_id = user_.id) as creator_name,
+(select avatar from user_ where c.creator_id = user_.id) as creator_avatar,
+coalesce(sum(cl.score), 0) as score,
+count (case when cl.score = 1 then 1 else null end) as upvotes,
+count (case when cl.score = -1 then 1 else null end) as downvotes
+from comment c
+left join comment_like cl on c.id = cl.comment_id
+group by c.id;
+
+create materialized view comment_aggregates_mview as select * from comment_aggregates_view;
+
+create unique index idx_comment_aggregates_mview_id on comment_aggregates_mview (id);
+
+drop view reply_view;
+drop view user_mention_view;
+drop view comment_view;
+
+create view comment_view as
+with all_comment as
+(
+  select
+  ca.*
+  from comment_aggregates_view ca
+)
+
+select
+ac.*,
+u.id as user_id,
+coalesce(cl.score, 0) as my_vote,
+(select cs.id::bool from comment_saved cs where u.id = cs.user_id and cs.comment_id = ac.id) as saved
+from user_ u
+cross join all_comment ac
+left join comment_like cl on u.id = cl.user_id and ac.id = cl.comment_id
+
+union all
+
+select 
+    ac.*,
+    null as user_id, 
+    null as my_vote,
+    null as saved
+from all_comment ac
+;
+
+create view comment_mview as
+with all_comment as
+(
+  select
+  ca.*
+  from comment_aggregates_mview ca
+)
+
+select
+ac.*,
+u.id as user_id,
+coalesce(cl.score, 0) as my_vote,
+(select cs.id::bool from comment_saved cs where u.id = cs.user_id and cs.comment_id = ac.id) as saved
+from user_ u
+cross join all_comment ac
+left join comment_like cl on u.id = cl.user_id and ac.id = cl.comment_id
+
+union all
+
+select 
+    ac.*,
+    null as user_id, 
+    null as my_vote,
+    null as saved
+from all_comment ac
+;
+
+create view reply_view as 
+with closereply as (
+    select 
+    c2.id, 
+    c2.creator_id as sender_id, 
+    c.creator_id as recipient_id
+    from comment c
+    inner join comment c2 on c.id = c2.parent_id
+    where c2.creator_id != c.creator_id
+    -- Do union where post is null
+    union
+    select
+    c.id,
+    c.creator_id as sender_id,
+    p.creator_id as recipient_id
+    from comment c, post p
+    where c.post_id = p.id and c.parent_id is null and c.creator_id != p.creator_id
+)
+select cv.*,
+closereply.recipient_id
+from comment_view cv, closereply
+where closereply.id = cv.id
+;
+
+-- user mention
+create view user_mention_view as
+select 
+    c.id,
+    um.id as user_mention_id,
+    c.creator_id,
+    c.post_id,
+    c.parent_id,
+    c.content,
+    c.removed,
+    um.read,
+    c.published,
+    c.updated,
+    c.deleted,
+    c.community_id,
+    c.banned,
+    c.banned_from_community,
+    c.creator_name,
+    c.creator_avatar,
+    c.score,
+    c.upvotes,
+    c.downvotes,
+    c.user_id,
+    c.my_vote,
+    c.saved,
+    um.recipient_id
+from user_mention um, comment_view c
+where um.comment_id = c.id;
+
+-- user
+create or replace function refresh_user()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently user_mview;
+  refresh materialized view concurrently comment_aggregates_mview; -- cause of bans
+  refresh materialized view concurrently post_aggregates_mview;
+  return null;
+end $$;
+
+create trigger refresh_user
+after insert or update or delete or truncate
+on user_
+for each statement
+execute procedure refresh_user();
+
+-- post
+create or replace function refresh_post()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently post_aggregates_mview;
+  refresh materialized view concurrently user_mview;
+  return null;
+end $$;
+
+create trigger refresh_post
+after insert or update or delete or truncate
+on post
+for each statement
+execute procedure refresh_post();
+
+-- post_like
+create or replace function refresh_post_like()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently post_aggregates_mview;
+  refresh materialized view concurrently user_mview; 
+  return null;
+end $$;
+
+create trigger refresh_post_like
+after insert or update or delete or truncate
+on post_like
+for each statement
+execute procedure refresh_post_like();
+
+-- community
+create or replace function refresh_community()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently post_aggregates_mview;
+  refresh materialized view concurrently community_aggregates_mview; 
+  refresh materialized view concurrently user_mview;
+  return null;
+end $$;
+
+create trigger refresh_community
+after insert or update or delete or truncate
+on community
+for each statement
+execute procedure refresh_community();
+
+-- community_follower
+create or replace function refresh_community_follower()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently community_aggregates_mview;
+  refresh materialized view concurrently post_aggregates_mview;
+  return null;
+end $$;
+
+create trigger refresh_community_follower
+after insert or update or delete or truncate
+on community_follower
+for each statement
+execute procedure refresh_community_follower();
+
+-- community_user_ban
+create or replace function refresh_community_user_ban()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently comment_aggregates_mview;
+  refresh materialized view concurrently post_aggregates_mview;
+  return null;
+end $$;
+
+create trigger refresh_community_user_ban
+after insert or update or delete or truncate
+on community_user_ban
+for each statement
+execute procedure refresh_community_user_ban();
+
+-- comment
+create or replace function refresh_comment()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently post_aggregates_mview;
+  refresh materialized view concurrently comment_aggregates_mview; 
+  refresh materialized view concurrently community_aggregates_mview; 
+  refresh materialized view concurrently user_mview; 
+  return null;
+end $$;
+
+create trigger refresh_comment
+after insert or update or delete or truncate
+on comment
+for each statement
+execute procedure refresh_comment();
+
+-- comment_like
+create or replace function refresh_comment_like()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently comment_aggregates_mview;
+  refresh materialized view concurrently user_mview;
+  return null;
+end $$;
+
+create trigger refresh_comment_like
+after insert or update or delete or truncate
+on comment_like
+for each statement
+execute procedure refresh_comment_like();

server/migrations_testing/2020-01-13-025151_create_materialized_views/down.sql

@@ -0,0 +1,211 @@
+-- functions and triggers
+drop trigger refresh_user on user_;
+drop function refresh_user();
+drop trigger refresh_post on post;
+drop function refresh_post();
+drop trigger refresh_post_like on post_like;
+drop function refresh_post_like();
+drop trigger refresh_community on community;
+drop function refresh_community();
+drop trigger refresh_community_follower on community_follower;
+drop function refresh_community_follower();
+drop trigger refresh_comment on comment;
+drop function refresh_comment();
+drop trigger refresh_comment_like on comment_like;
+drop function refresh_comment_like();
+
+-- post
+-- Recreate the view
+drop materialized view post_view;
+create view post_view as
+with all_post as
+(
+  select        
+  p.*,
+  (select u.banned from user_ u where p.creator_id = u.id) as banned,
+  (select cb.id::bool from community_user_ban cb where p.creator_id = cb.user_id and p.community_id = cb.community_id) as banned_from_community,
+  (select name from user_ where p.creator_id = user_.id) as creator_name,
+  (select avatar from user_ where p.creator_id = user_.id) as creator_avatar,
+  (select name from community where p.community_id = community.id) as community_name,
+  (select removed from community c where p.community_id = c.id) as community_removed,
+  (select deleted from community c where p.community_id = c.id) as community_deleted,
+  (select nsfw from community c where p.community_id = c.id) as community_nsfw,
+  (select count(*) from comment where comment.post_id = p.id) as number_of_comments,
+  coalesce(sum(pl.score), 0) as score,
+  count (case when pl.score = 1 then 1 else null end) as upvotes,
+  count (case when pl.score = -1 then 1 else null end) as downvotes,
+  hot_rank(coalesce(sum(pl.score) , 0), p.published) as hot_rank
+  from post p
+  left join post_like pl on p.id = pl.post_id
+  group by p.id
+)
+
+select
+ap.*,
+u.id as user_id,
+coalesce(pl.score, 0) as my_vote,
+(select cf.id::bool from community_follower cf where u.id = cf.user_id and cf.community_id = ap.community_id) as subscribed,
+(select pr.id::bool from post_read pr where u.id = pr.user_id and pr.post_id = ap.id) as read,
+(select ps.id::bool from post_saved ps where u.id = ps.user_id and ps.post_id = ap.id) as saved
+from user_ u
+cross join all_post ap
+left join post_like pl on u.id = pl.user_id and ap.id = pl.post_id
+
+union all
+
+select 
+ap.*,
+null as user_id,
+null as my_vote,
+null as subscribed,
+null as read,
+null as saved
+from all_post ap
+;
+
+
+drop materialized view user_view;
+create view user_view as 
+select id,
+name,
+avatar,
+email,
+fedi_name,
+admin,
+banned,
+show_avatars,
+send_notifications_to_email,
+published,
+(select count(*) from post p where p.creator_id = u.id) as number_of_posts,
+(select coalesce(sum(score), 0) from post p, post_like pl where u.id = p.creator_id and p.id = pl.post_id) as post_score,
+(select count(*) from comment c where c.creator_id = u.id) as number_of_comments,
+(select coalesce(sum(score), 0) from comment c, comment_like cl where u.id = c.creator_id and c.id = cl.comment_id) as comment_score
+from user_ u;
+
+
+-- community
+drop materialized view community_view;
+create view community_view as 
+with all_community as
+(
+  select *,
+  (select name from user_ u where c.creator_id = u.id) as creator_name,
+  (select avatar from user_ u where c.creator_id = u.id) as creator_avatar,
+  (select name from category ct where c.category_id = ct.id) as category_name,
+  (select count(*) from community_follower cf where cf.community_id = c.id) as number_of_subscribers,
+  (select count(*) from post p where p.community_id = c.id) as number_of_posts,
+  (select count(*) from comment co, post p where c.id = p.community_id and p.id = co.post_id) as number_of_comments,
+  hot_rank((select count(*) from community_follower cf where cf.community_id = c.id), c.published) as hot_rank
+  from community c
+)
+
+select
+ac.*,
+u.id as user_id,
+(select cf.id::boolean from community_follower cf where u.id = cf.user_id and ac.id = cf.community_id) as subscribed
+from user_ u
+cross join all_community ac
+
+union all
+
+select 
+ac.*,
+null as user_id,
+null as subscribed
+from all_community ac
+;
+
+-- reply and comment view
+drop view reply_view;
+drop view user_mention_view;
+drop materialized view comment_view;
+create view comment_view as
+with all_comment as
+(
+  select        
+  c.*,
+  (select community_id from post p where p.id = c.post_id),
+  (select u.banned from user_ u where c.creator_id = u.id) as banned,
+  (select cb.id::bool from community_user_ban cb, post p where c.creator_id = cb.user_id and p.id = c.post_id and p.community_id = cb.community_id) as banned_from_community,
+  (select name from user_ where c.creator_id = user_.id) as creator_name,
+  (select avatar from user_ where c.creator_id = user_.id) as creator_avatar,
+  coalesce(sum(cl.score), 0) as score,
+  count (case when cl.score = 1 then 1 else null end) as upvotes,
+  count (case when cl.score = -1 then 1 else null end) as downvotes
+  from comment c
+  left join comment_like cl on c.id = cl.comment_id
+  group by c.id
+)
+
+select
+ac.*,
+u.id as user_id,
+coalesce(cl.score, 0) as my_vote,
+(select cs.id::bool from comment_saved cs where u.id = cs.user_id and cs.comment_id = ac.id) as saved
+from user_ u
+cross join all_comment ac
+left join comment_like cl on u.id = cl.user_id and ac.id = cl.comment_id
+
+union all
+
+select 
+    ac.*,
+    null as user_id, 
+    null as my_vote,
+    null as saved
+from all_comment ac
+;
+
+create view reply_view as 
+with closereply as (
+    select 
+    c2.id, 
+    c2.creator_id as sender_id, 
+    c.creator_id as recipient_id
+    from comment c
+    inner join comment c2 on c.id = c2.parent_id
+    where c2.creator_id != c.creator_id
+    -- Do union where post is null
+    union
+    select
+    c.id,
+    c.creator_id as sender_id,
+    p.creator_id as recipient_id
+    from comment c, post p
+    where c.post_id = p.id and c.parent_id is null and c.creator_id != p.creator_id
+)
+select cv.*,
+closereply.recipient_id
+from comment_view cv, closereply
+where closereply.id = cv.id
+;
+
+-- user mention
+create view user_mention_view as
+select 
+    c.id,
+    um.id as user_mention_id,
+    c.creator_id,
+    c.post_id,
+    c.parent_id,
+    c.content,
+    c.removed,
+    um.read,
+    c.published,
+    c.updated,
+    c.deleted,
+    c.community_id,
+    c.banned,
+    c.banned_from_community,
+    c.creator_name,
+    c.creator_avatar,
+    c.score,
+    c.upvotes,
+    c.downvotes,
+    c.user_id,
+    c.my_vote,
+    c.saved,
+    um.recipient_id
+from user_mention um, comment_view c
+where um.comment_id = c.id;
+

server/migrations_testing/2020-01-13-025151_create_materialized_views/up.sql

@@ -0,0 +1,324 @@
+-- post
+drop view post_view;
+create materialized view post_view as
+with all_post as
+(
+  select        
+  p.*,
+  (select u.banned from user_ u where p.creator_id = u.id) as banned,
+  (select cb.id::bool from community_user_ban cb where p.creator_id = cb.user_id and p.community_id = cb.community_id) as banned_from_community,
+  (select name from user_ where p.creator_id = user_.id) as creator_name,
+  (select avatar from user_ where p.creator_id = user_.id) as creator_avatar,
+  (select name from community where p.community_id = community.id) as community_name,
+  (select removed from community c where p.community_id = c.id) as community_removed,
+  (select deleted from community c where p.community_id = c.id) as community_deleted,
+  (select nsfw from community c where p.community_id = c.id) as community_nsfw,
+  (select count(*) from comment where comment.post_id = p.id) as number_of_comments,
+  coalesce(sum(pl.score), 0) as score,
+  count (case when pl.score = 1 then 1 else null end) as upvotes,
+  count (case when pl.score = -1 then 1 else null end) as downvotes,
+  hot_rank(coalesce(sum(pl.score) , 0), p.published) as hot_rank
+  from post p
+  left join post_like pl on p.id = pl.post_id
+  group by p.id
+)
+
+select
+ap.*,
+u.id as user_id,
+coalesce(pl.score, 0) as my_vote,
+(select cf.id::bool from community_follower cf where u.id = cf.user_id and cf.community_id = ap.community_id) as subscribed,
+(select pr.id::bool from post_read pr where u.id = pr.user_id and pr.post_id = ap.id) as read,
+(select ps.id::bool from post_saved ps where u.id = ps.user_id and ps.post_id = ap.id) as saved
+from user_ u
+cross join all_post ap
+left join post_like pl on u.id = pl.user_id and ap.id = pl.post_id
+
+union all
+
+select 
+ap.*,
+null as user_id,
+null as my_vote,
+null as subscribed,
+null as read,
+null as saved
+from all_post ap
+with data
+;
+
+create unique index idx_post_view_unique on post_view (id, user_id); 
+create index idx_post_view_user_id on post_view (user_id);
+create index idx_post_view_hot_rank_published on post_view (hot_rank desc, published desc);
+create index idx_post_view_published on post_view (published desc);
+create index idx_post_view_score on post_view (score desc);
+
+-- user_view
+drop view user_view;
+create materialized view user_view as 
+select id,
+name,
+avatar,
+email,
+fedi_name,
+admin,
+banned,
+show_avatars,
+send_notifications_to_email,
+published,
+(select count(*) from post p where p.creator_id = u.id) as number_of_posts,
+(select coalesce(sum(score), 0) from post p, post_like pl where u.id = p.creator_id and p.id = pl.post_id) as post_score,
+(select count(*) from comment c where c.creator_id = u.id) as number_of_comments,
+(select coalesce(sum(score), 0) from comment c, comment_like cl where u.id = c.creator_id and c.id = cl.comment_id) as comment_score
+from user_ u;
+
+create unique index idx_user_view_unique on user_view (id); 
+create index idx_user_view_comment_published on user_view (comment_score desc, published desc);
+create index idx_user_view_admin on user_view (admin);
+create index idx_user_view_banned on user_view (banned);
+
+-- community
+drop view community_view;
+create materialized view community_view as 
+with all_community as
+(
+  select *,
+  (select name from user_ u where c.creator_id = u.id) as creator_name,
+  (select avatar from user_ u where c.creator_id = u.id) as creator_avatar,
+  (select name from category ct where c.category_id = ct.id) as category_name,
+  (select count(*) from community_follower cf where cf.community_id = c.id) as number_of_subscribers,
+  (select count(*) from post p where p.community_id = c.id) as number_of_posts,
+  (select count(*) from comment co, post p where c.id = p.community_id and p.id = co.post_id) as number_of_comments,
+  hot_rank((select count(*) from community_follower cf where cf.community_id = c.id), c.published) as hot_rank
+  from community c
+)
+
+select
+ac.*,
+u.id as user_id,
+(select cf.id::boolean from community_follower cf where u.id = cf.user_id and ac.id = cf.community_id) as subscribed
+from user_ u
+cross join all_community ac
+
+union all
+
+select 
+ac.*,
+null as user_id,
+null as subscribed
+from all_community ac
+;
+
+create unique index idx_community_view_unique on community_view (id, user_id); 
+create index idx_community_view_user_id on community_view (user_id);
+create index idx_community_view_hot_rank_subscribed on community_view (hot_rank desc, number_of_subscribers desc);
+
+
+-- reply and comment view
+drop view reply_view;
+drop view user_mention_view;
+drop view comment_view;
+create materialized view comment_view as
+with all_comment as
+(
+  select        
+  c.*,
+  (select community_id from post p where p.id = c.post_id),
+  (select u.banned from user_ u where c.creator_id = u.id) as banned,
+  (select cb.id::bool from community_user_ban cb, post p where c.creator_id = cb.user_id and p.id = c.post_id and p.community_id = cb.community_id) as banned_from_community,
+  (select name from user_ where c.creator_id = user_.id) as creator_name,
+  (select avatar from user_ where c.creator_id = user_.id) as creator_avatar,
+  coalesce(sum(cl.score), 0) as score,
+  count (case when cl.score = 1 then 1 else null end) as upvotes,
+  count (case when cl.score = -1 then 1 else null end) as downvotes
+  from comment c
+  left join comment_like cl on c.id = cl.comment_id
+  group by c.id
+)
+
+select
+ac.*,
+u.id as user_id,
+coalesce(cl.score, 0) as my_vote,
+(select cs.id::bool from comment_saved cs where u.id = cs.user_id and cs.comment_id = ac.id) as saved
+from user_ u
+cross join all_comment ac
+left join comment_like cl on u.id = cl.user_id and ac.id = cl.comment_id
+
+union all
+
+select 
+    ac.*,
+    null as user_id, 
+    null as my_vote,
+    null as saved
+from all_comment ac
+;
+
+create unique index idx_comment_view_unique on comment_view (id, user_id); 
+create index idx_comment_view_user_id on comment_view (user_id);
+create index idx_comment_view_creator_id on comment_view (creator_id);
+create index idx_comment_view_post_id on comment_view (post_id);
+create index idx_comment_view_score on comment_view (score desc);
+
+create view reply_view as 
+with closereply as (
+    select 
+    c2.id, 
+    c2.creator_id as sender_id, 
+    c.creator_id as recipient_id
+    from comment c
+    inner join comment c2 on c.id = c2.parent_id
+    where c2.creator_id != c.creator_id
+    -- Do union where post is null
+    union
+    select
+    c.id,
+    c.creator_id as sender_id,
+    p.creator_id as recipient_id
+    from comment c, post p
+    where c.post_id = p.id and c.parent_id is null and c.creator_id != p.creator_id
+)
+select cv.*,
+closereply.recipient_id
+from comment_view cv, closereply
+where closereply.id = cv.id
+;
+
+-- user mention
+create view user_mention_view as
+select 
+    c.id,
+    um.id as user_mention_id,
+    c.creator_id,
+    c.post_id,
+    c.parent_id,
+    c.content,
+    c.removed,
+    um.read,
+    c.published,
+    c.updated,
+    c.deleted,
+    c.community_id,
+    c.banned,
+    c.banned_from_community,
+    c.creator_name,
+    c.creator_avatar,
+    c.score,
+    c.upvotes,
+    c.downvotes,
+    c.user_id,
+    c.my_vote,
+    c.saved,
+    um.recipient_id
+from user_mention um, comment_view c
+where um.comment_id = c.id;
+
+-- user
+create or replace function refresh_user()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently comment_view; -- cause of bans
+  refresh materialized view concurrently post_view;
+  return null;
+end $$;
+
+create trigger refresh_user
+after insert or update or delete or truncate
+on user_
+for each statement
+execute procedure refresh_user();
+
+-- post
+create or replace function refresh_post()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently post_view; 
+  return null;
+end $$;
+
+create trigger refresh_post
+after insert or update or delete or truncate
+on post
+for each statement
+execute procedure refresh_post();
+
+-- post_like
+create or replace function refresh_post_like()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently post_view;
+  return null;
+end $$;
+
+create trigger refresh_post_like
+after insert or update or delete or truncate
+on post_like
+for each statement
+execute procedure refresh_post_like();
+
+-- community
+create or replace function refresh_community()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently post_view;
+  refresh materialized view concurrently community_view; 
+  return null;
+end $$;
+
+create trigger refresh_community
+after insert or update or delete or truncate
+on community
+for each statement
+execute procedure refresh_community();
+
+-- community_follower
+create or replace function refresh_community_follower()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently community_view;
+  refresh materialized view concurrently post_view;
+  return null;
+end $$;
+
+create trigger refresh_community_follower
+after insert or update or delete or truncate
+on community_follower
+for each statement
+execute procedure refresh_community_follower();
+
+-- comment
+create or replace function refresh_comment()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently post_view;
+  refresh materialized view concurrently comment_view; 
+  return null;
+end $$;
+
+create trigger refresh_comment
+after insert or update or delete or truncate
+on comment
+for each statement
+execute procedure refresh_comment();
+
+-- comment_like
+create or replace function refresh_comment_like()
+returns trigger language plpgsql
+as $$
+begin
+  refresh materialized view concurrently comment_view;
+  return null;
+end $$;
+
+create trigger refresh_comment_like
+after insert or update or delete or truncate
+on comment_like
+for each statement
+execute procedure refresh_comment_like();

server/query_testing/apache_bench_report.sh

@@ -7,6 +7,7 @@ declare -a arr=(
 "https://dev.lemmy.ml/feeds/all.xml"
 "https://dev.lemmy.ml/.well-known/nodeinfo"
 "https://fediverse.blog/.well-known/nodeinfo"
+"https://torrents-csv.ml/service/search?q=wheel&page=1&type_=torrent"
 )
 
 ## now loop through the above array

server/query_testing/generate_explain_reports.sh

@@ -2,19 +2,16 @@
 
 # Do the views first
 
-echo "explain (analyze, format json) select * from user_view" > explain.sql
+echo "explain (analyze, format json) select * from user_mview" > explain.sql
 psql -qAt -U lemmy -f explain.sql > user_view.json
 
-echo "explain (analyze, format json) select * from post_view where user_id is null order by hot_rank desc" > explain.sql
+echo "explain (analyze, format json) select * from post_mview where user_id is null order by hot_rank desc, published desc" > explain.sql
 psql -qAt -U lemmy -f explain.sql > post_view.json
 
-echo "explain (analyze, format json) select * from post" > explain.sql
-psql -qAt -U lemmy -f explain.sql > post.json
-
-echo "explain (analyze, format json) select * from comment_view where user_id is null" > explain.sql
+echo "explain (analyze, format json) select * from comment_mview where user_id is null" > explain.sql
 psql -qAt -U lemmy -f explain.sql > comment_view.json
 
-echo "explain (analyze, format json) select * from community_view where user_id is null order by hot_rank desc" > explain.sql
+echo "explain (analyze, format json) select * from community_mview where user_id is null order by hot_rank desc" > explain.sql
 psql -qAt -U lemmy -f explain.sql > community_view.json
 
 echo "explain (analyze, format json) select * from site_view limit 1" > explain.sql

server/src/db/comment_view.rs

@@ -28,6 +28,32 @@ table! {
   }
 }
 
+table! {
+  comment_mview (id) {
+    id -> Int4,
+    creator_id -> Int4,
+    post_id -> Int4,
+    parent_id -> Nullable<Int4>,
+    content -> Text,
+    removed -> Bool,
+    read -> Bool,
+    published -> Timestamp,
+    updated -> Nullable<Timestamp>,
+    deleted -> Bool,
+    community_id -> Int4,
+    banned -> Bool,
+    banned_from_community -> Bool,
+    creator_name -> Varchar,
+    creator_avatar -> Nullable<Text>,
+    score -> BigInt,
+    upvotes -> BigInt,
+    downvotes -> BigInt,
+    user_id -> Nullable<Int4>,
+    my_vote -> Nullable<Int4>,
+    saved -> Nullable<Bool>,
+  }
+}
+
 #[derive(
   Queryable, Identifiable, PartialEq, Debug, Serialize, Deserialize, QueryableByName, Clone,
 )]
@@ -58,7 +84,7 @@ pub struct CommentView {
 
 pub struct CommentQueryBuilder<'a> {
   conn: &'a PgConnection,
-  query: super::comment_view::comment_view::BoxedQuery<'a, Pg>,
+  query: super::comment_view::comment_mview::BoxedQuery<'a, Pg>,
   sort: &'a SortType,
   for_post_id: Option<i32>,
   for_creator_id: Option<i32>,
@@ -71,9 +97,9 @@ pub struct CommentQueryBuilder<'a> {
 
 impl<'a> CommentQueryBuilder<'a> {
   pub fn create(conn: &'a PgConnection) -> Self {
-    use super::comment_view::comment_view::dsl::*;
+    use super::comment_view::comment_mview::dsl::*;
 
-    let query = comment_view.into_boxed();
+    let query = comment_mview.into_boxed();
 
     CommentQueryBuilder {
       conn,
@@ -130,7 +156,7 @@ impl<'a> CommentQueryBuilder<'a> {
   }
 
   pub fn list(self) -> Result<Vec<CommentView>, Error> {
-    use super::comment_view::comment_view::dsl::*;
+    use super::comment_view::comment_mview::dsl::*;
 
     let mut query = self.query;
 

server/src/db/community_view.rs

@@ -1,4 +1,4 @@
-use super::community_view::community_view::BoxedQuery;
+use super::community_view::community_mview::BoxedQuery;
 use super::*;
 use diesel::pg::Pg;
 
@@ -27,6 +27,31 @@ table! {
   }
 }
 
+table! {
+  community_mview (id) {
+    id -> Int4,
+    name -> Varchar,
+    title -> Varchar,
+    description -> Nullable<Text>,
+    category_id -> Int4,
+    creator_id -> Int4,
+    removed -> Bool,
+    published -> Timestamp,
+    updated -> Nullable<Timestamp>,
+    deleted -> Bool,
+    nsfw -> Bool,
+    creator_name -> Varchar,
+    creator_avatar -> Nullable<Text>,
+    category_name -> Varchar,
+    number_of_subscribers -> BigInt,
+    number_of_posts -> BigInt,
+    number_of_comments -> BigInt,
+    hot_rank -> Int4,
+    user_id -> Nullable<Int4>,
+    subscribed -> Nullable<Bool>,
+  }
+}
+
 table! {
   community_moderator_view (id) {
     id -> Int4,
@@ -103,9 +128,9 @@ pub struct CommunityQueryBuilder<'a> {
 
 impl<'a> CommunityQueryBuilder<'a> {
   pub fn create(conn: &'a PgConnection) -> Self {
-    use super::community_view::community_view::dsl::*;
+    use super::community_view::community_mview::dsl::*;
 
-    let query = community_view.into_boxed();
+    let query = community_mview.into_boxed();
 
     CommunityQueryBuilder {
       conn,
@@ -150,7 +175,7 @@ impl<'a> CommunityQueryBuilder<'a> {
   }
 
   pub fn list(self) -> Result<Vec<CommunityView>, Error> {
-    use super::community_view::community_view::dsl::*;
+    use super::community_view::community_mview::dsl::*;
 
     let mut query = self.query;
 

server/src/db/post_view.rs

@@ -1,4 +1,4 @@
-use super::post_view::post_view::BoxedQuery;
+use super::post_view::post_mview::BoxedQuery;
 use super::*;
 use diesel::pg::Pg;
 
@@ -77,6 +77,43 @@ pub struct PostView {
   pub saved: Option<bool>,
 }
 
+// The faked schema since diesel doesn't do views
+table! {
+  post_mview (id) {
+    id -> Int4,
+    name -> Varchar,
+    url -> Nullable<Text>,
+    body -> Nullable<Text>,
+    creator_id -> Int4,
+    community_id -> Int4,
+    removed -> Bool,
+    locked -> Bool,
+    published -> Timestamp,
+    updated -> Nullable<Timestamp>,
+    deleted -> Bool,
+    nsfw -> Bool,
+    banned -> Bool,
+    banned_from_community -> Bool,
+    stickied -> Bool,
+    creator_name -> Varchar,
+    creator_avatar -> Nullable<Text>,
+    community_name -> Varchar,
+    community_removed -> Bool,
+    community_deleted -> Bool,
+    community_nsfw -> Bool,
+    number_of_comments -> BigInt,
+    score -> BigInt,
+    upvotes -> BigInt,
+    downvotes -> BigInt,
+    hot_rank -> Int4,
+    user_id -> Nullable<Int4>,
+    my_vote -> Nullable<Int4>,
+    subscribed -> Nullable<Bool>,
+    read -> Nullable<Bool>,
+    saved -> Nullable<Bool>,
+  }
+}
+
 pub struct PostQueryBuilder<'a> {
   conn: &'a PgConnection,
   query: BoxedQuery<'a, Pg>,
@@ -93,9 +130,9 @@ pub struct PostQueryBuilder<'a> {
 
 impl<'a> PostQueryBuilder<'a> {
   pub fn create(conn: &'a PgConnection) -> Self {
-    use super::post_view::post_view::dsl::*;
+    use super::post_view::post_mview::dsl::*;
 
-    let query = post_view.into_boxed();
+    let query = post_mview.into_boxed();
 
     PostQueryBuilder {
       conn,
@@ -123,7 +160,7 @@ impl<'a> PostQueryBuilder<'a> {
   }
 
   pub fn for_community_id<T: MaybeOptional<i32>>(mut self, for_community_id: T) -> Self {
-    use super::post_view::post_view::dsl::*;
+    use super::post_view::post_mview::dsl::*;
     if let Some(for_community_id) = for_community_id.get_optional() {
       self.query = self.query.filter(community_id.eq(for_community_id));
       self.query = self.query.then_order_by(stickied.desc());
@@ -139,7 +176,7 @@ impl<'a> PostQueryBuilder<'a> {
   }
 
   pub fn search_term<T: MaybeOptional<String>>(mut self, search_term: T) -> Self {
-    use super::post_view::post_view::dsl::*;
+    use super::post_view::post_mview::dsl::*;
     if let Some(search_term) = search_term.get_optional() {
       self.query = self.query.filter(name.ilike(fuzzy_search(&search_term)));
     }
@@ -147,7 +184,7 @@ impl<'a> PostQueryBuilder<'a> {
   }
 
   pub fn url_search<T: MaybeOptional<String>>(mut self, url_search: T) -> Self {
-    use super::post_view::post_view::dsl::*;
+    use super::post_view::post_mview::dsl::*;
     if let Some(url_search) = url_search.get_optional() {
       self.query = self.query.filter(url.eq(url_search));
     }
@@ -185,7 +222,7 @@ impl<'a> PostQueryBuilder<'a> {
   }
 
   pub fn list(self) -> Result<Vec<PostView>, Error> {
-    use super::post_view::post_view::dsl::*;
+    use super::post_view::post_mview::dsl::*;
 
     let mut query = self.query;
 

server/src/db/user_view.rs

@@ -1,4 +1,4 @@
-use super::user_view::user_view::BoxedQuery;
+use super::user_view::user_mview::BoxedQuery;
 use super::*;
 use diesel::pg::Pg;
 
@@ -21,6 +21,25 @@ table! {
   }
 }
 
+table! {
+  user_mview (id) {
+    id -> Int4,
+    name -> Varchar,
+    avatar -> Nullable<Text>,
+    email -> Nullable<Text>,
+    fedi_name -> Varchar,
+    admin -> Bool,
+    banned -> Bool,
+    show_avatars -> Bool,
+    send_notifications_to_email -> Bool,
+    published -> Timestamp,
+    number_of_posts -> BigInt,
+    post_score -> BigInt,
+    number_of_comments -> BigInt,
+    comment_score -> BigInt,
+  }
+}
+
 #[derive(
   Queryable, Identifiable, PartialEq, Debug, Serialize, Deserialize, QueryableByName, Clone,
 )]
@@ -52,9 +71,9 @@ pub struct UserQueryBuilder<'a> {
 
 impl<'a> UserQueryBuilder<'a> {
   pub fn create(conn: &'a PgConnection) -> Self {
-    use super::user_view::user_view::dsl::*;
+    use super::user_view::user_mview::dsl::*;
 
-    let query = user_view.into_boxed();
+    let query = user_mview.into_boxed();
 
     UserQueryBuilder {
       conn,
@@ -71,7 +90,7 @@ impl<'a> UserQueryBuilder<'a> {
   }
 
   pub fn search_term<T: MaybeOptional<String>>(mut self, search_term: T) -> Self {
-    use super::user_view::user_view::dsl::*;
+    use super::user_view::user_mview::dsl::*;
     if let Some(search_term) = search_term.get_optional() {
       self.query = self.query.filter(name.ilike(fuzzy_search(&search_term)));
     }
@@ -89,7 +108,7 @@ impl<'a> UserQueryBuilder<'a> {
   }
 
   pub fn list(self) -> Result<Vec<UserView>, Error> {
-    use super::user_view::user_view::dsl::*;
+    use super::user_view::user_mview::dsl::*;
 
     let mut query = self.query;
 
@@ -128,12 +147,12 @@ impl UserView {
   }
 
   pub fn admins(conn: &PgConnection) -> Result<Vec<Self>, Error> {
-    use super::user_view::user_view::dsl::*;
-    user_view.filter(admin.eq(true)).load::<Self>(conn)
+    use super::user_view::user_mview::dsl::*;
+    user_mview.filter(admin.eq(true)).load::<Self>(conn)
   }
 
   pub fn banned(conn: &PgConnection) -> Result<Vec<Self>, Error> {
-    use super::user_view::user_view::dsl::*;
-    user_view.filter(banned.eq(true)).load::<Self>(conn)
+    use super::user_view::user_mview::dsl::*;
+    user_mview.filter(banned.eq(true)).load::<Self>(conn)
   }
 }

server/src/routes/websocket.rs

@@ -141,7 +141,7 @@ impl StreamHandler<Result<ws::Message, ws::ProtocolError>> for WSSession {
       }
       ws::Message::Text(text) => {
         let m = text.trim().to_owned();
-        // println!("WEBSOCKET MESSAGE: {:?} from id: {}", &m, self.id);
+        println!("WEBSOCKET MESSAGE: {:?} from id: {}", &m, self.id);
 
         self
           .cs_addr