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Fix un-reblogged status being at wrong position in the home timeline (#5418)

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We've changed un-reblogging behavior when we implement Snowflake, to insert un-reblogged status at the position reblogging status existed.

However, our API expects home timeline is ordered by status ids, and max_id/since_id filters by zset score. Due to this, un-reblogged status appears as a last item of result set, and timeline expansion may skips many statuses.

So this reverts that change...reblogged status inserted at corresponding position to its id.
This commit is contained in:
unarist 2017-10-16 22:58:23 +09:00 committed by Eugen Rochko
parent 03975dbde4
commit 6f490b4bfe
2 changed files with 11 additions and 7 deletions
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9
app/lib/feed_manager.rb
View file

@ -198,10 +198,11 @@ class FeedManager
# 2. Remove the reblogged status from the `:reblogs` zset.
redis.zrem(reblog_key, status.reblog_of_id)
# 3. Add the reblogged status to the feed using the reblogging
# status' ID as its score, and the reblogged status' ID as its
# value.
redis.zadd(timeline_key, status.id, status.reblog_of_id)
# 3. Add the reblogged status to the feed.
# Note that we can't use old score in here
# and it must be an ID of corresponding status
# because we need to filter timeline by status ID.
redis.zadd(timeline_key, status.reblog_of_id, status.reblog_of_id)
# 4. Remove the reblogging status from the feed (as normal)
end

9
spec/lib/feed_manager_spec.rb
View file

@ -233,19 +233,22 @@ RSpec.describe FeedManager do
describe '#unpush' do
it 'leaves a reblogged status when deleting the reblog' do
account = Fabricate(:account)
reblogged = Fabricate(:status)
reblogged = Fabricate(:status, id: Mastodon::Snowflake.id_at(2.day.ago.utc))
other_status = Fabricate(:status, id: Mastodon::Snowflake.id_at(1.day.ago.utc))
status = Fabricate(:status, reblog: reblogged)
FeedManager.instance.push('type', account, other_status)
FeedManager.instance.push('type', account, status)
# The reblogging status should show up under normal conditions.
expect(Redis.current.zrange("feed:type:#{account.id}", 0, -1)).to eq [status.id.to_s]
expect(Redis.current.zrange("feed:type:#{account.id}", 0, -1)).to eq [other_status.id.to_s, status.id.to_s]
FeedManager.instance.unpush('type', account, status)
# Because we couldn't tell if the status showed up any other way,
# we had to stick the reblogged status in by itself.
expect(Redis.current.zrange("feed:type:#{account.id}", 0, -1)).to eq [reblogged.id.to_s]
# And it must be ordered by status ids.
expect(Redis.current.zrange("feed:type:#{account.id}", 0, -1)).to eq [reblogged.id.to_s, other_status.id.to_s]
end
it 'sends push updates' do