discourse/db/migrate/20130322183614_add_percent_rank_to_posts.rb

# frozen_string_literal: true

class AddPercentRankToPosts < ActiveRecord::Migration[4.2]
  def change
    add_column :posts, :percent_rank, :float, default: 1.0

    execute "UPDATE posts SET percent_rank = x.percent_rank
              FROM (SELECT id, percent_rank()
                    OVER (PARTITION BY topic_id ORDER BY SCORE DESC)
                    FROM posts) AS x
              WHERE x.id = posts.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 AddPercentRankToPosts < ActiveRecord::Migration[4.2]`
The "Best Of" mode uses a percentage ranking of posts. 2013-03-23 03:43:57 +08:00			`def change`
			`add_column :posts, :percent_rank, :float, default: 1.0`

			`execute "UPDATE posts SET percent_rank = x.percent_rank`
			`FROM (SELECT id, percent_rank()`
			`OVER (PARTITION BY topic_id ORDER BY SCORE DESC)`
			`FROM posts) AS x`
			`WHERE x.id = posts.id"`

			`end`
			`end`