mirror of
https://github.com/LemmyNet/lemmy
synced 2024-11-27 15:00:45 +00:00
73 lines
2.4 KiB
PL/PgSQL
73 lines
2.4 KiB
PL/PgSQL
-- Rank = ScaleFactor * sign(Score) * log(1 + abs(Score)) / (Time + 2)^Gravity
|
|
create or replace function hot_rank(
|
|
score numeric,
|
|
published timestamp without time zone)
|
|
returns integer as $$
|
|
begin
|
|
-- hours_diff:=EXTRACT(EPOCH FROM (timezone('utc',now()) - published))/3600
|
|
return 10000*sign(score)*log(1 + abs(score)) / power(((EXTRACT(EPOCH FROM (timezone('utc',now()) - published))/3600) + 2), 1.8);
|
|
end; $$
|
|
LANGUAGE plpgsql;
|
|
|
|
create view post_view as
|
|
with all_post as
|
|
(
|
|
select
|
|
p.*,
|
|
(select name from user_ where p.creator_id = user_.id) as creator_name,
|
|
(select name from community where p.community_id = community.id) as community_name,
|
|
(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
|
|
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
|
|
from all_post ap
|
|
;
|
|
|
|
/* The old post view */
|
|
/* create view post_view as */
|
|
/* select */
|
|
/* u.id as user_id, */
|
|
/* pl.score as my_vote, */
|
|
/* p.id as id, */
|
|
/* p.name as name, */
|
|
/* p.url, */
|
|
/* p.body, */
|
|
/* p.creator_id, */
|
|
/* (select name from user_ where p.creator_id = user_.id) creator_name, */
|
|
/* p.community_id, */
|
|
/* (select name from community where p.community_id = community.id) as community_name, */
|
|
/* (select count(*) from comment where comment.post_id = p.id) as number_of_comments, */
|
|
/* coalesce(sum(pl.score) over (partition by p.id), 0) as score, */
|
|
/* count (case when pl.score = 1 then 1 else null end) over (partition by p.id) as upvotes, */
|
|
/* count (case when pl.score = -1 then 1 else null end) over (partition by p.id) as downvotes, */
|
|
/* hot_rank(coalesce(sum(pl.score) over (partition by p.id) , 0), p.published) as hot_rank, */
|
|
/* p.published, */
|
|
/* p.updated */
|
|
/* from user_ u */
|
|
/* cross join post p */
|
|
/* left join post_like pl on u.id = pl.user_id and p.id = pl.post_id; */
|
|
|
|
|
|
|