lemmy/migrations/2023-07-18-082614_post_aggregates_community_id/up.sql

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-- Your SQL goes here
ALTER TABLE post_aggregates
ADD COLUMN community_id integer REFERENCES community ON UPDATE CASCADE ON DELETE CASCADE,
ADD COLUMN creator_id integer REFERENCES person ON UPDATE CASCADE ON DELETE CASCADE;
CREATE OR REPLACE FUNCTION post_aggregates_post()
RETURNS trigger
LANGUAGE plpgsql
AS
$$
BEGIN
IF (TG_OP = 'INSERT') THEN
INSERT INTO post_aggregates (post_id,
published,
newest_comment_time,
newest_comment_time_necro,
community_id,
creator_id)
VALUES (NEW.id, NEW.published, NEW.published, NEW.published, NEW.community_id, NEW.creator_id);
ELSIF (TG_OP = 'DELETE') THEN
DELETE FROM post_aggregates WHERE post_id = OLD.id;
END IF;
RETURN NULL;
END
$$;
UPDATE post_aggregates
SET community_id=post.community_id,
creator_id=post.creator_id
FROM post
WHERE post.id = post_aggregates.post_id;
ALTER TABLE post_aggregates
ALTER COLUMN community_id SET NOT NULL,
ALTER COLUMN creator_id SET NOT NULL;