mirror of
https://github.com/codeninjasllc/discourse.git
synced 2024-12-11 00:02:05 -05:00
31 lines
678 B
Ruby
31 lines
678 B
Ruby
class MakePostNumberDistinct < ActiveRecord::Migration
|
|
def up
|
|
|
|
Topic.exec_sql('update posts p
|
|
set post_number = calc
|
|
from
|
|
(
|
|
select
|
|
id,
|
|
post_number,
|
|
topic_id,
|
|
row_number() over (partition by topic_id order by post_number, created_at) calc
|
|
from posts
|
|
where topic_id in (
|
|
select topic_id from posts
|
|
group by topic_id, post_number
|
|
having count(*)>1
|
|
)
|
|
|
|
) as X
|
|
where calc <> p.post_number and X.id = p.id')
|
|
|
|
remove_index :posts, :forum_thread_id_and_post_number
|
|
add_index :posts, [:topic_id, :post_number], unique: true
|
|
end
|
|
|
|
def down
|
|
# don't want to mess with the index ... its annoying
|
|
raise ActiveRecord::IrreversibleMigration
|
|
end
|
|
end
|