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Add reputation and followers score boost to SQL-only account search (#19251)

shrike
Eugen Rochko 2022-10-30 13:23:05 +01:00 committed by GitHub
parent 40c7f3e830
commit ac9fb0d654
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1 changed files with 14 additions and 6 deletions
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20
app/models/account.rb
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@ -445,7 +445,12 @@ class Account < ApplicationRecord
class << self
DISALLOWED_TSQUERY_CHARACTERS = /['?\\:‘’]/.freeze
TEXTSEARCH = "(setweight(to_tsvector('simple', accounts.display_name), 'A') || setweight(to_tsvector('simple', accounts.username), 'B') || setweight(to_tsvector('simple', coalesce(accounts.domain, '')), 'C'))"
TEXTSEARCH = "(setweight(to_tsvector('simple', accounts.display_name), 'A') || setweight(to_tsvector('simple', accounts.username), 'A') || setweight(to_tsvector('simple', coalesce(accounts.domain, '')), 'C'))"
REPUTATION_SCORE_FUNCTION = '(greatest(0, coalesce(s.followers_count, 0)) / (greatest(0, coalesce(s.following_count, 0)) + 1.0))'
FOLLOWERS_SCORE_FUNCTION = 'log(greatest(0, coalesce(s.followers_count, 0)) + 2)'
TIME_DISTANCE_FUNCTION = '(case when s.last_status_at is null then 0 else exp(-1.0 * ((greatest(0, abs(extract(DAY FROM age(s.last_status_at))) - 30.0)^2) / (2.0 * ((-1.0 * 30^2) / (2.0 * ln(0.3)))))) end)'
BOOST = "((#{REPUTATION_SCORE_FUNCTION} + #{FOLLOWERS_SCORE_FUNCTION} + #{TIME_DISTANCE_FUNCTION}) / 3.0)"
def readonly_attributes
super - %w(statuses_count following_count followers_count)
@ -462,9 +467,10 @@ class Account < ApplicationRecord
sql = <<-SQL.squish
SELECT
accounts.*,
ts_rank_cd(#{TEXTSEARCH}, to_tsquery('simple', :tsquery), 32) AS rank
#{BOOST} * ts_rank_cd(#{TEXTSEARCH}, to_tsquery('simple', :tsquery), 32) AS rank
FROM accounts
LEFT JOIN users ON accounts.id = users.account_id
LEFT JOIN account_stats AS s ON accounts.id = s.account_id
WHERE to_tsquery('simple', :tsquery) @@ #{TEXTSEARCH}
AND accounts.suspended_at IS NULL
AND accounts.moved_to_account_id IS NULL
@ -526,14 +532,15 @@ class Account < ApplicationRecord
)
SELECT
accounts.*,
(count(f.id) + 1) * ts_rank_cd(#{TEXTSEARCH}, to_tsquery('simple', :tsquery), 32) AS rank
(count(f.id) + 1) * #{BOOST} * ts_rank_cd(#{TEXTSEARCH}, to_tsquery('simple', :tsquery), 32) AS rank
FROM accounts
LEFT OUTER JOIN follows AS f ON (accounts.id = f.account_id AND f.target_account_id = :id)
LEFT JOIN account_stats AS s ON accounts.id = s.account_id
WHERE accounts.id IN (SELECT * FROM first_degree)
AND to_tsquery('simple', :tsquery) @@ #{TEXTSEARCH}
AND accounts.suspended_at IS NULL
AND accounts.moved_to_account_id IS NULL
GROUP BY accounts.id
GROUP BY accounts.id, s.id
ORDER BY rank DESC
LIMIT :limit OFFSET :offset
SQL
@ -541,15 +548,16 @@ class Account < ApplicationRecord
<<-SQL.squish
SELECT
accounts.*,
(count(f.id) + 1) * ts_rank_cd(#{TEXTSEARCH}, to_tsquery('simple', :tsquery), 32) AS rank
(count(f.id) + 1) * #{BOOST} * ts_rank_cd(#{TEXTSEARCH}, to_tsquery('simple', :tsquery), 32) AS rank
FROM accounts
LEFT OUTER JOIN follows AS f ON (accounts.id = f.account_id AND f.target_account_id = :id) OR (accounts.id = f.target_account_id AND f.account_id = :id)
LEFT JOIN users ON accounts.id = users.account_id
LEFT JOIN account_stats AS s ON accounts.id = s.account_id
WHERE to_tsquery('simple', :tsquery) @@ #{TEXTSEARCH}
AND accounts.suspended_at IS NULL
AND accounts.moved_to_account_id IS NULL
AND (accounts.domain IS NOT NULL OR (users.approved = TRUE AND users.confirmed_at IS NOT NULL))
GROUP BY accounts.id
GROUP BY accounts.id, s.id
ORDER BY rank DESC
LIMIT :limit OFFSET :offset
SQL