added default value for group by in init of new query

git-svn-id: https://dev.finn.de/svn/cockpit/trunk@226 7926756e-e54e-46e6-9721-ed318f58905e

app/controllers/cost_reports_controller.rb

@@ -84,8 +84,6 @@ private
           @query.display_time_entries = params[:cost_query][:display_time_entries]
         end
         
-        
-        @query.group_by = params[:group_by]
         session[:cost_query] = {:project_id => @query.project_id,
                                 :filters => @query.filters,
                                 :group_by => @query.group_by,

app/models/cost_query.rb

@@ -87,7 +87,7 @@ class CostQuery < ActiveRecord::Base
     self.display_time_entries = true if display_time_entries.nil?
     self.display_cost_entries = true if display_cost_entries.nil?
     
-    self.group_by = {} if group_by.blank?
+    self.group_by ||= {}
   end
   
   def self.operators