discourse/db/migrate/20140804072504_views_to_topic_views.rb

# frozen_string_literal: true

class ViewsToTopicViews < ActiveRecord::Migration[4.2]
  def change
    remove_column :views, :parent_type
    rename_column :views, :parent_id, :topic_id

    rename_table :views, :topic_views

    add_index :topic_views, [:topic_id]
    add_index :topic_views, %i[user_id topic_id]
  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 ViewsToTopicViews < ActiveRecord::Migration[4.2]`
PERF: store topic views in a topic view table * cut down on storage of the work Topic, 3 times per row (in 2 indexes) * only store one view per user per topic * only store one view per ip per topic 2014-08-04 17:07:55 +08:00			`def change`
			`remove_column :views, :parent_type`
			`rename_column :views, :parent_id, :topic_id`

			`rename_table :views, :topic_views`

			`add_index :topic_views, [:topic_id]`
			`add_index :topic_views, %i[user_id topic_id]`
			`end`
			`end`