discourse/db/migrate/20140910130155_create_topic_user_index.rb

# frozen_string_literal: true

class CreateTopicUserIndex < ActiveRecord::Migration[4.2]
  def change
    # seems to be the most effective for joining into topics
    add_index :topic_users, %i[user_id topic_id], unique: true
  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 08:17:27 +10:00			`# 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 CreateTopicUserIndex < ActiveRecord::Migration[4.2]`
PERF: reverse index on topic users to speed up join 2014-09-10 23:03:59 +10:00			`def change`
			`# seems to be the most effective for joining into topics`
			`add_index :topic_users, %i[user_id topic_id], unique: true`
			`end`
			`end`