discourse/db/migrate/20150106215342_remove_stars.rb

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# frozen_string_literal: true
class RemoveStars < ActiveRecord::Migration[4.2]
def up
r = execute <<SQL
INSERT INTO post_actions(user_id, post_id, post_action_type_id, created_at, updated_at)
SELECT tu.user_id, p.id, 1, coalesce(tu.starred_at, now()), coalesce(tu.starred_at, now())
FROM topic_users tu
JOIN posts p ON p.topic_id = tu.topic_id AND p.post_number = 1
LEFT JOIN post_actions pa ON
pa.post_id = p.id AND
pa.user_id = tu.user_id AND
pa.post_action_type_id = 1
WHERE pa.post_id IS NULL AND tu.starred
SQL
puts "#{r.cmd_tuples} stars were converted to bookmarks!"
execute <<SQL
DELETE FROM user_actions WHERE action_type = 10
SQL
remove_column :topic_users, :starred
remove_column :topic_users, :starred_at
remove_column :topic_users, :unstarred_at
remove_column :topics, :star_count
end
def down
raise ActiveRecord::IrreversibleMigration
end
end