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Fix context performance by partially reverting #7083 (#7734) 

* Fix context performance by partially reverting #7083

* Fix code style issue

* fix off-by-1 error in thread limits

* code style fix
pull/7740/merge
nightpool 2018-06-04 16:20:12 -04:00 committed by Eugen Rochko
parent dc73241bd9
commit 5fb013878f
1 changed files with 8 additions and 2 deletions
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10
app/models/concerns/status_threading_concern.rb
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@ -51,12 +51,16 @@ module StatusThreadingConcern
end
def descendant_statuses(limit, max_child_id, since_child_id, depth)
Status.find_by_sql([<<-SQL.squish, id: id, limit: limit, max_child_id: max_child_id, since_child_id: since_child_id, depth: depth])
# use limit + 1 and depth + 1 because 'self' is included
depth += 1 if depth.present?
limit += 1 if limit.present?
descendants_with_self = Status.find_by_sql([<<-SQL.squish, id: id, limit: limit, max_child_id: max_child_id, since_child_id: since_child_id, depth: depth])
WITH RECURSIVE search_tree(id, path)
AS (
SELECT id, ARRAY[id]
FROM statuses
WHERE in_reply_to_id = :id AND COALESCE(id < :max_child_id, TRUE) AND COALESCE(id > :since_child_id, TRUE)
WHERE id = :id AND COALESCE(id < :max_child_id, TRUE) AND COALESCE(id > :since_child_id, TRUE)
UNION ALL
SELECT statuses.id, path || statuses.id
FROM search_tree
@ -68,6 +72,8 @@ module StatusThreadingConcern
ORDER BY path
LIMIT :limit
SQL
descendants_with_self - [self]
end
def find_statuses_from_tree_path(ids, account)