Reload detached attachments (#32922).

Patch by Pavel Rosický.


git-svn-id: http://svn.redmine.org/redmine/trunk@20927 e93f8b46-1217-0410-a6f0-8f06a7374b81

Author: vividtone

lib/plugins/acts_as_attachable/lib/acts_as_attachable.rb

@@ -125,9 +125,7 @@ def attach_saved_attachments
 
         def detach_saved_attachments
           saved_attachments.each do |attachment|
-            # TODO: use #reload instead, after upgrading to Rails 5
-            # (after_rollback is called when running transactional tests in Rails 4)
-            attachment.container = nil
+            attachment.reload
           end
         end