discourse/app/jobs/onceoff/fix_posts_read.rb
Sam 5f64fd0a21 DEV: remove exec_sql and replace with mini_sql
Introduce new patterns for direct sql that are safe and fast.

MiniSql is not prone to memory bloat that can happen with direct PG usage.
It also has an extremely fast materializer and very a convenient API

- DB.exec(sql, *params) => runs sql returns row count
- DB.query(sql, *params) => runs sql returns usable objects (not a hash)
- DB.query_hash(sql, *params) => runs sql returns an array of hashes
- DB.query_single(sql, *params) => runs sql and returns a flat one dimensional array
- DB.build(sql) => returns a sql builder

See more at: https://github.com/discourse/mini_sql
2018-06-19 16:13:36 +10:00

22 lines
533 B
Ruby

module Jobs
class FixPostsRead < Jobs::Onceoff
def execute_onceoff(args)
# Skipping to the last post in a topic used to count all posts in the topic
# as read in user stats. Cap the posts read count to 50 * topics_entered.
sql = <<~SQL
UPDATE user_stats
SET posts_read_count = topics_entered * 50
WHERE user_id IN (
SELECT us2.user_id
FROM user_stats us2
WHERE us2.topics_entered > 0
AND us2.posts_read_count / us2.topics_entered > 50
)
SQL
DB.exec(sql)
end
end
end