Chris@909: class SetTopicAuthorsAsWatchers < ActiveRecord::Migration
Chris@909:   def self.up
Chris@909:     # Sets active users who created/replied a topic as watchers of the topic
Chris@909:     # so that the new watch functionality at topic level doesn't affect notifications behaviour
Chris@909:     Message.connection.execute("INSERT INTO #{Watcher.table_name} (watchable_type, watchable_id, user_id)" +
Chris@909:                                  " SELECT DISTINCT 'Message', COALESCE(m.parent_id, m.id), m.author_id" +
Chris@909:                                  " FROM #{Message.table_name} m, #{User.table_name} u" +
Chris@909:                                  " WHERE m.author_id = u.id AND u.status = 1")
Chris@909:   end
Chris@909: 
Chris@909:   def self.down
Chris@909:     # Removes all message watchers
Chris@909:     Watcher.delete_all("watchable_type = 'Message'")
Chris@909:   end
Chris@909: end