Revert support from loading Home timeline from database
Unfortunately, the database query could turn out very inefficient and I did not manage to find a way to improve that. Furthermore, there were still behavior inconsistencies between fetching the timeline from Redis and fetching it from Postgres.lolsob-rspec
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7096e42392
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ae3313b3ed
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@ -9,52 +9,4 @@ class HomeFeed < Feed
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def regenerating?
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redis.exists?("account:#{@account.id}:regeneration")
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end
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def get(limit, max_id = nil, since_id = nil, min_id = nil)
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limit = limit.to_i
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max_id = max_id.to_i if max_id.present?
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since_id = since_id.to_i if since_id.present?
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min_id = min_id.to_i if min_id.present?
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if min_id.present?
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redis_min_id = fetch_min_redis_id
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return from_redis(limit, max_id, since_id, min_id) if redis_min_id && min_id >= redis_min_id
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statuses = from_database(limit, redis_min_id, since_id, min_id)
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return statuses if statuses.size >= limit
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remaining_limit = limit - statuses.size
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min_id = statuses.first.id unless statuses.empty?
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from_redis(remaining_limit, max_id, since_id, min_id) + statuses
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else
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statuses = from_redis(limit, max_id, since_id, min_id)
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return statuses if statuses.size >= limit
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if since_id.present?
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redis_min_id = fetch_min_redis_id
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return statuses if redis_min_id.present? && since_id >= redis_min_id
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end
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remaining_limit = limit - statuses.size
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max_id = statuses.last.id unless statuses.empty?
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statuses + from_database(remaining_limit, max_id, since_id, min_id)
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end
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end
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protected
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def from_database(limit, max_id, since_id, min_id)
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scope = Status.where(account: @account).or(Status.where(account: @account.following))
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scope = scope.where(visibility: %i(public unlisted private))
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scope
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.to_a_paginated_by_id(limit, min_id: min_id, max_id: max_id, since_id: since_id)
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.reject { |status| FeedManager.instance.filter?(:home, status, @account) }
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.sort_by { |status| -status.id }
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end
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private
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def fetch_min_redis_id
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redis.zrangebyscore(key, '(0', '(+inf', limit: [0, 1], with_scores: true).first&.first&.to_i
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end
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end
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@ -2,71 +2,31 @@ require 'rails_helper'
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RSpec.describe HomeFeed, type: :model do
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let(:account) { Fabricate(:account) }
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let(:followed) { Fabricate(:account) }
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let(:other) { Fabricate(:account) }
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subject { described_class.new(account) }
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describe '#get' do
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before do
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account.follow!(followed)
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Fabricate(:status, account: account, id: 1)
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Fabricate(:status, account: account, id: 2)
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status = Fabricate(:status, account: followed, id: 3)
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Fabricate(:mention, account: account, status: status)
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Fabricate(:status, account: account, id: 3)
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Fabricate(:status, account: account, id: 10)
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Fabricate(:status, account: other, id: 11)
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Fabricate(:status, account: followed, id: 12, visibility: :private)
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Fabricate(:status, account: followed, id: 13, visibility: :direct)
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end
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context 'when feed is generated' do
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before do
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FeedManager.instance.populate_home(account)
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Redis.current.zadd(
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FeedManager.instance.key(:home, account.id),
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[[4, 4], [3, 3], [2, 2], [1, 1]]
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)
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end
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it 'gets statuses with ids in the range from redis with database' do
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it 'gets statuses with ids in the range from redis' do
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results = subject.get(3)
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expect(results.map(&:id)).to eq [12, 10, 3]
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expect(results.map(&:id)).to eq [3, 2]
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expect(results.first.attributes.keys).to eq %w(id updated_at)
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end
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it 'with since_id present' do
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results = subject.get(3, nil, 3, nil)
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expect(results.map(&:id)).to eq [12, 10]
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end
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it 'with min_id present' do
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results = subject.get(3, nil, nil, 0)
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expect(results.map(&:id)).to eq [3, 2, 1]
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end
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end
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context 'when feed is only partial' do
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before do
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FeedManager.instance.populate_home(account)
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Redis.current.zremrangebyrank(FeedManager.instance.key(:home, account.id), 0, -2)
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end
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it 'gets statuses with ids in the range from redis with database' do
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results = subject.get(3)
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expect(results.map(&:id)).to eq [12, 10, 3]
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expect(results.first.attributes.keys).to eq %w(id updated_at)
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end
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it 'with since_id present' do
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results = subject.get(3, nil, 3, nil)
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expect(results.map(&:id)).to eq [12, 10]
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end
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it 'with min_id present' do
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results = subject.get(3, nil, nil, 0)
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expect(results.map(&:id)).to eq [3, 2, 1]
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end
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end
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context 'when feed is being generated' do
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@ -74,20 +34,10 @@ RSpec.describe HomeFeed, type: :model do
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Redis.current.set("account:#{account.id}:regeneration", true)
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end
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it 'returns from database' do
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it 'returns nothing' do
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results = subject.get(3)
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expect(results.map(&:id)).to eq [12, 10, 3]
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end
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it 'with since_id present' do
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results = subject.get(3, nil, 3, nil)
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expect(results.map(&:id)).to eq [12, 10]
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end
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it 'with min_id present' do
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results = subject.get(3, nil, nil, 0)
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expect(results.map(&:id)).to eq [3, 2, 1]
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expect(results.map(&:id)).to eq []
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end
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end
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end
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