Refactor: makes issue id a regular QueryColumn.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11447 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/issue_query.rb

@@ -20,6 +20,7 @@ class IssueQuery < Query
   self.queried_class = Issue
 
   self.available_columns = [
+    QueryColumn.new(:id, :sortable => "#{Issue.table_name}.id", :default_order => 'desc', :caption => '#', :frozen => true),
     QueryColumn.new(:project, :sortable => "#{Project.table_name}.name", :groupable => true),
     QueryColumn.new(:tracker, :sortable => "#{Tracker.table_name}.position", :groupable => true),
     QueryColumn.new(:parent, :sortable => ["#{Issue.table_name}.root_id", "#{Issue.table_name}.lft ASC"], :default_order => 'desc', :caption => :field_parent_issue),
@@ -216,10 +217,6 @@ class IssueQuery < Query
     @available_columns
   end
 
-  def sortable_columns
-    {'id' => "#{Issue.table_name}.id"}.merge(super)
-  end
-
   def default_columns_names
     @default_columns_names ||= begin
       default_columns = Setting.issue_list_default_columns.map(&:to_sym)