discourse/db/migrate/20160514100852_remove_inval...

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