mirror of
https://github.com/discourse/discourse.git
synced 2024-11-23 22:26:26 +08:00
13 lines
392 B
Ruby
13 lines
392 B
Ruby
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
|