discourse/db/migrate/20160514100852_remove_invalid_topic_user.rb
Sam Saffron 30990006a9 DEV: enable frozen string literal on all files
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.

Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
2019-05-13 09:31:32 +08:00

17 lines
317 B
Ruby

# frozen_string_literal: true
class RemoveInvalidTopicUser < ActiveRecord::Migration[4.2]
def up
execute <<-SQL
DELETE FROM topic_users
USING topic_users tu
LEFT JOIN users u ON u.id = tu.user_id
WHERE u.id IS NULL
AND topic_users.id = tu.id
SQL
end
def down
end
end