discourse/db/migrate/20121123054127_make_post_nu...

35 lines
739 B
Ruby
Raw Normal View History

2013-02-05 14:16:51 -05:00
class MakePostNumberDistinct < ActiveRecord::Migration
def up
Topic.exec_sql('update posts p
2013-02-25 11:42:20 -05:00
set post_number = calc
2013-02-05 14:16:51 -05:00
from
(
2013-02-25 11:42:20 -05:00
select
id,
post_number,
topic_id,
2013-02-05 14:16:51 -05:00
row_number() over (partition by topic_id order by post_number, created_at) calc
2013-02-25 11:42:20 -05:00
from posts
2013-02-05 14:16:51 -05:00
where topic_id in (
select topic_id from posts
group by topic_id, post_number
having count(*)>1
)
2013-02-25 11:42:20 -05:00
) as X
2013-02-05 14:16:51 -05:00
where calc <> p.post_number and X.id = p.id')
2013-10-30 01:17:58 -04:00
# automagically does this
unless rails4?
remove_index :posts, :forum_thread_id_and_post_number
add_index :posts, [:topic_id, :post_number], unique: true
end
2013-02-05 14:16:51 -05:00
end
def down
2013-02-25 11:42:20 -05:00
# don't want to mess with the index ... its annoying
2013-02-05 14:16:51 -05:00
raise ActiveRecord::IrreversibleMigration
end
end