lemmy/migrations/2019-04-03-155309_create_comment_view/up.sql

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create view comment_view as
with all_comment as
(
select
c.*,
(select community_id from post p where p.id = c.post_id),
(select u.banned from user_ u where c.creator_id = u.id) as banned,
(select cb.id::bool from community_user_ban cb, post p where c.creator_id = cb.user_id and p.id = c.post_id and p.community_id = cb.community_id) as banned_from_community,
(select name from user_ where c.creator_id = user_.id) as creator_name,
coalesce(sum(cl.score), 0) as score,
count (case when cl.score = 1 then 1 else null end) as upvotes,
count (case when cl.score = -1 then 1 else null end) as downvotes
from comment c
left join comment_like cl on c.id = cl.comment_id
group by c.id
)
select
ac.*,
u.id as user_id,
coalesce(cl.score, 0) as my_vote,
(select cs.id::bool from comment_saved cs where u.id = cs.user_id and cs.comment_id = ac.id) as saved
from user_ u
cross join all_comment ac
left join comment_like cl on u.id = cl.user_id and ac.id = cl.comment_id
union all
select
ac.*,
null as user_id,
null as my_vote,
null as saved
from all_comment ac
;
2019-04-20 18:17:00 +00:00
create view reply_view as
with closereply as (
select
c2.id,
c2.creator_id as sender_id,
c.creator_id as recipient_id
from comment c
inner join comment c2 on c.id = c2.parent_id
where c2.creator_id != c.creator_id
-- Do union where post is null
union
select
c.id,
c.creator_id as sender_id,
p.creator_id as recipient_id
from comment c, post p
where c.post_id = p.id and c.parent_id is null and c.creator_id != p.creator_id
)
select cv.*,
closereply.recipient_id
from comment_view cv, closereply
where closereply.id = cv.id
;