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Revert support from loading Home timeline from database

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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.
This commit is contained in:
Claire
2022-04-19 14:54:43 +02:00
parent ec4a8d81b1
commit 5c808ee0de
2 changed files with 13 additions and 111 deletions
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48
app/models/home_feed.rb
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@ -9,52 +9,4 @@ class HomeFeed < Feed
def regenerating?
redis.exists?("account:#{@account.id}:regeneration")
end
def get(limit, max_id = nil, since_id = nil, min_id = nil)
limit = limit.to_i
max_id = max_id.to_i if max_id.present?
since_id = since_id.to_i if since_id.present?
min_id = min_id.to_i if min_id.present?
if min_id.present?
redis_min_id = fetch_min_redis_id
return from_redis(limit, max_id, since_id, min_id) if redis_min_id && min_id >= redis_min_id
statuses = from_database(limit, redis_min_id, since_id, min_id)
return statuses if statuses.size >= limit
remaining_limit = limit - statuses.size
min_id = statuses.first.id unless statuses.empty?
from_redis(remaining_limit, max_id, since_id, min_id) + statuses
else
statuses = from_redis(limit, max_id, since_id, min_id)
return statuses if statuses.size >= limit
if since_id.present?
redis_min_id = fetch_min_redis_id
return statuses if redis_min_id.present? && since_id >= redis_min_id
end
remaining_limit = limit - statuses.size
max_id = statuses.last.id unless statuses.empty?
statuses + from_database(remaining_limit, max_id, since_id, min_id)
end
end
protected
def from_database(limit, max_id, since_id, min_id)
scope = Status.where(account: @account).or(Status.where(account: @account.following))
scope = scope.where(visibility: %i(public unlisted private))
scope
.to_a_paginated_by_id(limit, min_id: min_id, max_id: max_id, since_id: since_id)
.reject { |status| FeedManager.instance.filter?(:home, status, @account) }
.sort_by { |status| -status.id }
end
private
def fetch_min_redis_id
redis.zrangebyscore(key, '(0', '(+inf', limit: [0, 1], with_scores: true).first&.first&.to_i
end
end