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Paginate descendant statuses in public page (#7148)

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Akihiko Odaki 2018-04-24 02:27:35 +09:00 • committed by Eugen Rochko
parent 06817b3c1f
commit 1258efa882
8 changed files with 146 additions and 22 deletions
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17
app/models/concerns/status_threading_concern.rb
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@ -7,8 +7,8 @@ module StatusThreadingConcern
find_statuses_from_tree_path(ancestor_ids(limit), account)
end
def descendants(account = nil)
find_statuses_from_tree_path(descendant_ids, account)
def descendants(limit, account = nil, max_child_id = nil, since_child_id = nil, depth = nil)
find_statuses_from_tree_path(descendant_ids(limit, max_child_id, since_child_id, depth), account)
end
private
@ -46,26 +46,27 @@ module StatusThreadingConcern
SQL
end
def descendant_ids
descendant_statuses.pluck(:id)
def descendant_ids(limit, max_child_id, since_child_id, depth)
descendant_statuses(limit, max_child_id, since_child_id, depth).pluck(:id)
end
def descendant_statuses
Status.find_by_sql([<<-SQL.squish, id: id])
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])
WITH RECURSIVE search_tree(id, path)
AS (
SELECT id, ARRAY[id]
FROM statuses
WHERE in_reply_to_id = :id
WHERE in_reply_to_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
JOIN statuses ON statuses.in_reply_to_id = search_tree.id
WHERE NOT statuses.id = ANY(path)
WHERE COALESCE(array_length(path, 1) < :depth, TRUE) AND NOT statuses.id = ANY(path)
)
SELECT id
FROM search_tree
ORDER BY path
LIMIT :limit
SQL
end