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Some comment count fixes.

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- Make sure an update to deleted decreases the count. Fixes #1676
- Don't allow the post creator to comment necro-bump their own post.
  Fixes #1675
This commit is contained in:
Dessalines 2021-08-01 21:07:45 -04:00
parent 520436cd9a
commit 896ba8451c
2 changed files with 89 additions and 0 deletions
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28
migrations/2021-08-02-002342_comment_count_fixes/down.sql Normal file
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drop trigger post_aggregates_comment_set_deleted on comment;
drop function post_aggregates_comment_deleted;
create or replace function post_aggregates_comment_count()
returns trigger language plpgsql
as $$
begin
IF (TG_OP = 'INSERT') THEN
update post_aggregates pa
set comments = comments + 1,
newest_comment_time = NEW.published
where pa.post_id = NEW.post_id;
-- A 2 day necro-bump limit
update post_aggregates pa
set newest_comment_time_necro = NEW.published
where pa.post_id = NEW.post_id
and published > ('now'::timestamp - '2 days'::interval);
ELSIF (TG_OP = 'DELETE') THEN
-- Join to post because that post may not exist anymore
update post_aggregates pa
set comments = comments - 1
from post p
where pa.post_id = p.id
and pa.post_id = OLD.post_id;
END IF;
return null;
end $$;

61
migrations/2021-08-02-002342_comment_count_fixes/up.sql Normal file
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-- Creating a new trigger for when comment.deleted is updated
create or replace function post_aggregates_comment_deleted()
returns trigger language plpgsql
as $$
begin
IF NEW.deleted = TRUE THEN
update post_aggregates pa
set comments = comments - 1
where pa.post_id = NEW.post_id;
ELSE
update post_aggregates pa
set comments = comments + 1
where pa.post_id = NEW.post_id;
END IF;
return null;
end $$;
create trigger post_aggregates_comment_set_deleted
after update of deleted on comment
for each row
execute procedure post_aggregates_comment_deleted();
-- Fix issue with being able to necro-bump your own post
create or replace function post_aggregates_comment_count()
returns trigger language plpgsql
as $$
begin
IF (TG_OP = 'INSERT') THEN
update post_aggregates pa
set comments = comments + 1,
newest_comment_time = NEW.published
where pa.post_id = NEW.post_id;
-- A 2 day necro-bump limit
update post_aggregates pa
set newest_comment_time_necro = NEW.published
from post p
where pa.post_id = p.id
and pa.post_id = NEW.post_id
-- Fix issue with being able to necro-bump your own post
and NEW.creator_id != p.creator_id
and pa.published > ('now'::timestamp - '2 days'::interval);
ELSIF (TG_OP = 'DELETE') THEN
-- Join to post because that post may not exist anymore
update post_aggregates pa
set comments = comments - 1
from post p
where pa.post_id = p.id
and pa.post_id = OLD.post_id;
ELSIF (TG_OP = 'UPDATE') THEN
-- Join to post because that post may not exist anymore
update post_aggregates pa
set comments = comments - 1
from post p
where pa.post_id = p.id
and pa.post_id = OLD.post_id;
END IF;
return null;
end $$;