diff --git a/app/controllers/files_controller.rb b/app/controllers/files_controller.rb
index 8b1c8ba32..69e7105aa 100644
--- a/app/controllers/files_controller.rb
+++ b/app/controllers/files_controller.rb
@@ -145,10 +145,14 @@ class FilesController < ApplicationController
         ids += version.id.to_s
       end
     end
-    resultSet = Attachment.where("((attachments.container_type = 'Project' And attachments.container_id = '#{project.id}') OR (container_type = 'Version' AND container_id IN (#{ids}))) AND filename LIKE :like ", like: "%#{keywords}%").
-       reorder(sort)
-    #resultSet = Attachment.find_by_sql("SELECT `attachments`.* FROM `attachments` LEFT OUTER JOIN `homework_attaches` ON `attachments`.container_type = 'HomeworkAttach' AND `attachments`.container_id = `homework_attaches`.id LEFT OUTER JOIN `homework_for_courses` ON `homework_attaches`.bid_id = `homework_for_courses`.bid_id LEFT OUTER JOIN `homework_for_courses` AS H_C ON `attachments`.container_type = 'Bid' AND `attachments`.container_id = H_C.bid_id WHERE (`homework_for_courses`.course_id = 117 OR H_C.course_id = 117 OR (`attachments`.container_type = 'Course' AND `attachments`.container_id = 117)) AND `attachments`.filename LIKE '%#{keywords}%'").reorder("created_on DESC")
-  end
+    if ids.blank?
+      resultSet = Attachment.where("attachments.container_type = 'Project' And attachments.container_id = '#{project.id}' AND filename LIKE :like ", like: "%#{keywords}%").
+      reorder(sort)
+    else
+      resultSet = Attachment.where("((attachments.container_type = 'Project' And attachments.container_id = '#{project.id}') OR (container_type = 'Version' AND container_id IN (#{ids}))) AND filename LIKE :like ", like: "%#{keywords}%").
+      reorder(sort)
+    end
+   end
 
   def find_public_attache keywords,sort = ""
     # StoresController#search 将每条文件都查出来，再次进行判断过滤。---> resultSet.to_a.map