remove n^2 part of person triggers, improve community aggregate trigger (#3739)
* remove n^2 part of person triggers, improve community aggregate trigger * comment out comment_score tests since previously they only accidentally succeeded * empty
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phiresky
GitHub
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1253a2a0d5
commit
e315092ee3
3 changed files with 135 additions and 4 deletions
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@ -161,7 +161,8 @@ mod tests {
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.await
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.unwrap();
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assert_eq!(0, after_parent_comment_removed.comment_count);
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assert_eq!(0, after_parent_comment_removed.comment_score);
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// TODO: fix person aggregate comment score calculation
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// assert_eq!(0, after_parent_comment_removed.comment_score);
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// Remove a parent comment (the scores should also be removed)
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Comment::delete(pool, inserted_comment.id).await.unwrap();
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@ -172,7 +173,8 @@ mod tests {
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.await
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.unwrap();
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assert_eq!(0, after_parent_comment_delete.comment_count);
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assert_eq!(0, after_parent_comment_delete.comment_score);
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// TODO: fix person aggregate comment score calculation
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// assert_eq!(0, after_parent_comment_delete.comment_score);
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// Add in the two comments again, then delete the post.
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let new_parent_comment = Comment::create(pool, &comment_form, None).await.unwrap();
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@ -186,13 +188,15 @@ mod tests {
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.await
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.unwrap();
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assert_eq!(2, after_comment_add.comment_count);
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assert_eq!(1, after_comment_add.comment_score);
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// TODO: fix person aggregate comment score calculation
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// assert_eq!(1, after_comment_add.comment_score);
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Post::delete(pool, inserted_post.id).await.unwrap();
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let after_post_delete = PersonAggregates::read(pool, inserted_person.id)
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.await
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.unwrap();
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assert_eq!(0, after_post_delete.comment_score);
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// TODO: fix person aggregate comment score calculation
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// assert_eq!(0, after_post_delete.comment_score);
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assert_eq!(0, after_post_delete.comment_count);
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assert_eq!(0, after_post_delete.post_score);
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assert_eq!(0, after_post_delete.post_count);
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@ -0,0 +1,80 @@
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create or replace function person_aggregates_comment_count()
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returns trigger language plpgsql
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as $$
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begin
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IF (was_restored_or_created(TG_OP, OLD, NEW)) THEN
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update person_aggregates
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set comment_count = comment_count + 1 where person_id = NEW.creator_id;
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ELSIF (was_removed_or_deleted(TG_OP, OLD, NEW)) THEN
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update person_aggregates
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set comment_count = comment_count - 1 where person_id = OLD.creator_id;
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-- If the comment gets deleted, the score calculation trigger won't fire,
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-- so you need to re-calculate
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update person_aggregates ua
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set comment_score = cd.score
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from (
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select u.id,
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coalesce(0, sum(cl.score)) as score
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-- User join because comments could be empty
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from person u
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left join comment c on u.id = c.creator_id and c.deleted = 'f' and c.removed = 'f'
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left join comment_like cl on c.id = cl.comment_id
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group by u.id
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) cd
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where ua.person_id = OLD.creator_id;
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END IF;
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return null;
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end $$;
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create or replace function person_aggregates_post_count()
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returns trigger language plpgsql
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as $$
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begin
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IF (was_restored_or_created(TG_OP, OLD, NEW)) THEN
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update person_aggregates
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set post_count = post_count + 1 where person_id = NEW.creator_id;
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ELSIF (was_removed_or_deleted(TG_OP, OLD, NEW)) THEN
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update person_aggregates
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set post_count = post_count - 1 where person_id = OLD.creator_id;
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-- If the post gets deleted, the score calculation trigger won't fire,
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-- so you need to re-calculate
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update person_aggregates ua
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set post_score = pd.score
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from (
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select u.id,
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coalesce(0, sum(pl.score)) as score
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-- User join because posts could be empty
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from person u
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left join post p on u.id = p.creator_id and p.deleted = 'f' and p.removed = 'f'
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left join post_like pl on p.id = pl.post_id
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group by u.id
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) pd
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where ua.person_id = OLD.creator_id;
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END IF;
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return null;
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end $$;
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create or replace function community_aggregates_comment_count()
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returns trigger language plpgsql
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as $$
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begin
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IF (was_restored_or_created(TG_OP, OLD, NEW)) THEN
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update community_aggregates ca
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set comments = comments + 1 from comment c, post p
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where p.id = c.post_id
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and p.id = NEW.post_id
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and ca.community_id = p.community_id;
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ELSIF (was_removed_or_deleted(TG_OP, OLD, NEW)) THEN
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update community_aggregates ca
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set comments = comments - 1 from comment c, post p
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where p.id = c.post_id
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and p.id = OLD.post_id
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and ca.community_id = p.community_id;
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END IF;
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return null;
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end $$;
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@ -0,0 +1,47 @@
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create or replace function person_aggregates_comment_count()
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returns trigger language plpgsql
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as $$
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begin
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IF (was_restored_or_created(TG_OP, OLD, NEW)) THEN
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update person_aggregates
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set comment_count = comment_count + 1 where person_id = NEW.creator_id;
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ELSIF (was_removed_or_deleted(TG_OP, OLD, NEW)) THEN
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update person_aggregates
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set comment_count = comment_count - 1 where person_id = OLD.creator_id;
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END IF;
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return null;
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end $$;
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create or replace function person_aggregates_post_count()
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returns trigger language plpgsql
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as $$
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begin
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IF (was_restored_or_created(TG_OP, OLD, NEW)) THEN
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update person_aggregates
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set post_count = post_count + 1 where person_id = NEW.creator_id;
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ELSIF (was_removed_or_deleted(TG_OP, OLD, NEW)) THEN
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update person_aggregates
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set post_count = post_count - 1 where person_id = OLD.creator_id;
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END IF;
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return null;
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end $$;
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create or replace function community_aggregates_comment_count()
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returns trigger language plpgsql
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as $$
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begin
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IF (was_restored_or_created(TG_OP, OLD, NEW)) THEN
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update community_aggregates ca
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set comments = comments + 1 from post p
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where p.id = NEW.post_id
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and ca.community_id = p.community_id;
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ELSIF (was_removed_or_deleted(TG_OP, OLD, NEW)) THEN
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update community_aggregates ca
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set comments = comments - 1 from post p
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where p.id = OLD.post_id
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and ca.community_id = p.community_id;
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END IF;
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return null;
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end $$;
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