Use .distinct instead of .uniq.

git-svn-id: http://svn.redmine.org/redmine/trunk@15654 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/plugins/acts_as_searchable/lib/acts_as_searchable.rb

@@ -167,7 +167,7 @@ module Redmine
             scope.
               reorder(searchable_options[:date_column] => :desc, :id => :desc).
               limit(limit).
-              uniq.
+              distinct.
               pluck(searchable_options[:date_column], :id).
               # converts timestamps to integers for faster sort
               map {|timestamp, id| [timestamp.to_i, id]}