discourse/db/migrate/20160514100852_remove_invalid_topic_user.rb

# 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
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 2019-05-03 06:17:27 +08:00			`# frozen_string_literal: true`

Fix all the errors to get our tests green on Rails 5.1. 2017-08-31 12:06:56 +08:00			`class RemoveInvalidTopicUser < ActiveRecord::Migration[4.2]`
remove invalid topic_users rows 2016-05-15 00:34:03 +08:00			`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`