Do not push status to feed if its reblog is already inserted (#6488)

A complemental change for precompute_feed_service_spec.rb also fixes its
random failure which is caused by the Snowlake randomization of the order
of an original status and its reblog.
This commit is contained in:
Akihiko Odaki 2018-02-24 13:40:18 +09:00 committed by Eugen Rochko
parent e668180044
commit f8f0572ee0
4 changed files with 45 additions and 7 deletions

View file

@ -220,6 +220,14 @@ class FeedManager
return false
end
else
# A reblog may reach earlier than the original status because of the
# delay of the worker deliverying the original status, the late addition
# by merging timelines, and other reasons.
# If such a reblog already exists, just do not re-insert it into the feed.
rank = redis.zrevrank(reblog_key, status.id)
return false unless rank.nil?
redis.zadd(timeline_key, status.id, status.id)
end

View file

@ -1,4 +1,4 @@
Fabricator(:list) do
account nil
account
title "MyString"
end

View file

@ -157,7 +157,7 @@ RSpec.describe FeedManager do
end
end
describe '#push' do
describe '#push_to_home' do
it 'trims timelines if they will have more than FeedManager::MAX_ITEMS' do
account = Fabricate(:account)
status = Fabricate(:status)
@ -248,6 +248,39 @@ RSpec.describe FeedManager do
expect(FeedManager.instance.push_to_home(account, reblogs.last)).to be true
end
end
it "does not push when the given status's reblog is already inserted" do
account = Fabricate(:account)
reblog = Fabricate(:status)
status = Fabricate(:status, reblog: reblog)
FeedManager.instance.push_to_home(account, status)
expect(FeedManager.instance.push_to_home(account, reblog)).to eq false
end
end
describe '#push_to_list' do
it "does not push when the given status's reblog is already inserted" do
list = Fabricate(:list)
reblog = Fabricate(:status)
status = Fabricate(:status, reblog: reblog)
FeedManager.instance.push_to_list(list, status)
expect(FeedManager.instance.push_to_list(list, reblog)).to eq false
end
end
describe '#merge_into_timeline' do
it "does not push source account's statuses whose reblogs are already inserted" do
account = Fabricate(:account, id: 0)
reblog = Fabricate(:status)
status = Fabricate(:status, reblog: reblog)
FeedManager.instance.push_to_home(account, status)
FeedManager.instance.merge_into_timeline(account, reblog.account)
expect(Redis.current.zscore("feed:home:0", reblog.id)).to eq nil
end
end
describe '#trim' do

View file

@ -9,14 +9,11 @@ RSpec.describe PrecomputeFeedService do
let(:account) { Fabricate(:account) }
it 'fills a user timeline with statuses' do
account = Fabricate(:account)
followed_account = Fabricate(:account)
Fabricate(:follow, account: account, target_account: followed_account)
reblog = Fabricate(:status, account: followed_account)
status = Fabricate(:status, account: account, reblog: reblog)
status = Fabricate(:status, account: account)
subject.call(account)
expect(Redis.current.zscore(FeedManager.instance.key(:home, account.id), reblog.id)).to be_within(0.1).of(status.id.to_f)
expect(Redis.current.zscore(FeedManager.instance.key(:home, account.id), status.id)).to be_within(0.1).of(status.id.to_f)
end
it 'does not raise an error even if it could not find any status' do