mirror of
https://github.com/LemmyNet/lemmy.git
synced 2024-11-21 14:17:08 +00:00
update comment count in post trigger
This commit is contained in:
parent
0ca591e0ec
commit
0066a4b42b
|
@ -202,7 +202,8 @@ CALL r.post_or_comment ('post');
|
|||
|
||||
CALL r.post_or_comment ('comment');
|
||||
|
||||
-- Create triggers that update counts in parent aggregates
|
||||
-- Create triggers that update counts in parent aggregates (a trigger can run in response to deletion caused by
|
||||
-- a foreign key with `ON DELETE CASCADE`, so the parent might not exist)
|
||||
CALL r.create_triggers ('comment', $$ WITH comment_group AS (
|
||||
SELECT
|
||||
(comment).post_id,
|
||||
|
@ -287,7 +288,8 @@ unused_person_aggregates_update_result AS (
|
|||
|
||||
CALL r.create_triggers ('post', $$ WITH post_group AS (
|
||||
SELECT
|
||||
(post).community_id, (post).creator_id, (post).local, coalesce(sum(count_diff), 0) AS posts FROM combined_transition_tables
|
||||
(post).community_id, (post).creator_id, (post).local, coalesce(sum(count_diff), 0) AS posts,
|
||||
coalesce(sum(count_diff * (SELECT comments FROM post_aggregates WHERE post_id = (post).id LIMIT 1)), 0) AS comments FROM combined_transition_tables
|
||||
WHERE
|
||||
NOT ((post).deleted
|
||||
OR (post).removed)
|
||||
|
@ -307,7 +309,9 @@ CALL r.create_triggers ('post', $$ WITH post_group AS (
|
|||
UPDATE
|
||||
community_aggregates AS a
|
||||
SET
|
||||
posts = a.posts + post_group.posts FROM post_group
|
||||
posts = a.posts + post_group.posts,
|
||||
-- Update comment count when post is deleted, removed, or restored
|
||||
comments = a.comments + post_group.comments FROM post_group
|
||||
WHERE
|
||||
a.community_id = post_group.community_id $$);
|
||||
|
||||
|
@ -329,53 +333,6 @@ CALL r.create_triggers ('person', $$ UPDATE
|
|||
coalesce(sum(count_diff), 0) AS users FROM combined_transition_tables
|
||||
WHERE (person).local) AS diff $$);
|
||||
|
||||
-- For community_aggregates.comments, don't include comments of deleted or removed posts
|
||||
CREATE FUNCTION r.update_comment_count_from_post ()
|
||||
RETURNS TRIGGER
|
||||
LANGUAGE plpgsql
|
||||
AS $$
|
||||
BEGIN
|
||||
UPDATE
|
||||
community_aggregates AS a
|
||||
SET
|
||||
comments = a.comments + diff.comments
|
||||
FROM (
|
||||
SELECT
|
||||
old_post.community_id,
|
||||
sum((
|
||||
CASE WHEN new_post.deleted
|
||||
AND new_post.removed THEN
|
||||
-1
|
||||
ELSE
|
||||
1
|
||||
END) * post_aggregates.comments) AS comments
|
||||
FROM
|
||||
new_post
|
||||
INNER JOIN old_post ON new_post.id = old_post.id
|
||||
AND (new_post.deleted
|
||||
AND new_post.removed) != (old_post.deleted
|
||||
AND old_post.removed),
|
||||
LATERAL (
|
||||
SELECT
|
||||
*
|
||||
FROM
|
||||
post_aggregates
|
||||
WHERE
|
||||
post_id = new_post.id
|
||||
LIMIT 1) AS post_aggregates
|
||||
GROUP BY
|
||||
old_post.community_id) AS diff
|
||||
WHERE
|
||||
a.community_id = diff.community_id;
|
||||
RETURN NULL;
|
||||
END
|
||||
$$;
|
||||
|
||||
CREATE TRIGGER comment_count
|
||||
AFTER UPDATE ON post REFERENCING OLD TABLE AS old_post NEW TABLE AS new_post
|
||||
FOR EACH STATEMENT
|
||||
EXECUTE FUNCTION r.update_comment_count_from_post ();
|
||||
|
||||
-- Count subscribers for local communities
|
||||
CALL r.create_triggers ('community_follower', $$ UPDATE
|
||||
community_aggregates AS a
|
||||
|
|
Loading…
Reference in a new issue