mirror of
https://github.com/discourse/discourse.git
synced 2024-12-24 06:45:03 +08:00
15 lines
391 B
Ruby
15 lines
391 B
Ruby
# frozen_string_literal: true
|
|
|
|
class AddParticipantCountToTopics < ActiveRecord::Migration[4.2]
|
|
def up
|
|
add_column :topics, :participant_count, :integer, default: 1
|
|
|
|
execute "UPDATE topics SET participant_count =
|
|
(SELECT COUNT(DISTINCT p.user_id) FROM posts AS p WHERE p.topic_id = topics.id)"
|
|
end
|
|
|
|
def down
|
|
remove_column :topics, :participant_count
|
|
end
|
|
end
|