Attachment activity provider SQL optimization (#37057).

Patch by Jens Krämer.


git-svn-id: https://svn.redmine.org/redmine/trunk@21573 e93f8b46-1217-0410-a6f0-8f06a7374b81

Author: vividtone

app/models/attachment.rb

@@ -48,6 +48,7 @@ class Attachment < ActiveRecord::Base
     :scope =>
       proc do
         select("#{Attachment.table_name}.*").
+          where(container_type: ['Version', 'Project']).
           joins(
             "LEFT JOIN #{Version.table_name} " \
               "ON #{Attachment.table_name}.container_type='Version' " \