2014-10-23 16:05:52 FATAL -- ActiveRecord::StatementInvalid (Mysql2::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'desc ,attachments.filename desc ,attachments.filesize desc LIMIT 1' at line 1: SELECT DISTINCT `courses`.id FROM `courses` LEFT OUTER JOIN `attachments` ON `attachments`.`container_id` = `courses`.`id` AND `attachments`.`container_type` = 'Course' WHERE `courses`.`id` = 68 ORDER BY attachments. desc ,attachments.filename desc ,attachments.filesize desc LIMIT 1): app/controllers/files_controller.rb:125:in `index'