Fixed constant lookup issue with generated subclasses.

git-svn-id: https://dev.finn.de/svn/cockpit/branches/reporting_merge@1796 7926756e-e54e-46e6-9721-ed318f58905e

app/controllers/cost_reports_controller.rb

@@ -1,7 +1,7 @@
 class CostReportsController < ApplicationController
+  before_filter :load_all
   before_filter :find_optional_project, :only => [:index]
   before_filter :generate_query, :only => [:index]
-  before_filter :load_all
   before_filter :set_cost_types, :only => [:index]
 
   helper :reporting

app/models/cost_query/custom_field_mixin.rb

@@ -22,7 +22,7 @@ module CostQuery::CustomFieldMixin
   def generate_subclasses
     IssueCustomField.all.map do |field|
       class_name = class_name_for field.name
-      parent.send(:remove_const, class_name) if CostQuery::GroupBy.const_defined? class_name
+      parent.send(:remove_const, class_name) if parent.const_defined? class_name
       parent.const_set class_name, Class.new(self).prepare(field, class_name)
     end
   end