class CreateBookmarkActions < ActiveRecord::Migration[4.2] def up execute "INSERT INTO user_actions (action_type, user_id, target_topic_id, target_post_id, acting_user_id, created_at, updated_at) SELECT DISTINCT 3, pa.user_id, p.topic_id, pa.post_id, pa.user_id, pa.created_at, pa.updated_at FROM post_actions AS pa INNER JOIN posts AS p ON p.id = pa.post_id AND p.post_number = 1 WHERE NOT EXISTS (SELECT 1 FROM user_actions AS ua WHERE ua.target_post_id = pa.post_id AND ua.action_type = 3 AND ua.user_id = pa.user_id) AND pa.post_action_type_id = 1 AND pa.deleted_at IS NULL" end def down raise ActiveRecord::IrreversibleMigration end end