issue的排序经一线人员使用，还是按创建时间排序好

app/controllers/issues_controller.rb

@@ -58,7 +58,7 @@ class IssuesController < ApplicationController
 
   def index
     retrieve_query
-    sort_init(@query.sort_criteria.empty? ? [['updated_on', 'desc']] : @query.sort_criteria)
+    sort_init(@query.sort_criteria.empty? ? [['id', 'desc']] : @query.sort_criteria)
     sort_update(@query.sortable_columns)
     @query.sort_criteria = sort_criteria.to_a
 
@@ -387,7 +387,7 @@ class IssuesController < ApplicationController
   def retrieve_previous_and_next_issue_ids
     retrieve_query_from_session
     if @query
-      sort_init(@query.sort_criteria.empty? ? [['updated_on', 'desc']] : @query.sort_criteria)
+      sort_init(@query.sort_criteria.empty? ? [['id', 'desc']] : @query.sort_criteria)
       sort_update(@query.sortable_columns, 'issues_index_sort')
       limit = 500
       issue_ids = @query.issue_ids(:order => sort_clause, :limit => (limit + 1), :include => [:assigned_to, :tracker, :priority, :category, :fixed_version])