From e4439daf3b5f284e998143500f79e087455ab36e Mon Sep 17 00:00:00 2001
From: z9hang <z9hang@126.com>
Date: Fri, 12 Dec 2014 16:59:18 +0800
Subject: [PATCH] =?UTF-8?q?=E5=85=A8=E7=AB=99=E6=90=9C=E7=B4=A2bug?=
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---
 app/helpers/files_helper.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/app/helpers/files_helper.rb b/app/helpers/files_helper.rb
index 2ec7e6f45..de87b5c8a 100644
--- a/app/helpers/files_helper.rb
+++ b/app/helpers/files_helper.rb
@@ -116,6 +116,7 @@ module FilesHelper
 
   def attachment_candown attachment
     candown = false
+    if attachment.container
     if attachment.container.class.to_s != "HomeworkAttach" && (attachment.container.has_attribute?(:project) || attachment.container.has_attribute?(:project_id)) && attachment.container.project
       project = attachment.container.project
       candown= User.current.member_of?(project) || (project.is_public && attachment.is_public == 1)
@@ -144,6 +145,7 @@ module FilesHelper
     else
       candown = (attachment.is_public == 1 || attachment.is_public == true)
     end
+    end
     candown
   end