Graph should display values for all days of target period.

[spree#1269 state:resolved]

vendor/extensions/overview_dashboard/app/controllers/admin/overview_controller.rb

@@ -57,16 +57,26 @@ def conditions(params)
         ["completed_at >= ?", params[:from]]
       end
   end
+
+  def fill_empty_entries(orders, params)
+    from_date = params[:from].to_date
+    to_date = (params[:to] || Time.now).to_date
+    (from_date..to_date).each do |date|
+      orders[date] ||= []
+    end
+  end
 
   def orders_by_day(params)
 
     if params[:value] == "Count"
       orders = Order.find(:all, :select => 'created_at', :conditions => conditions(params))
-      orders = orders.group_by { |o| o.created_at.beginning_of_day }
+      orders = orders.group_by { |o| o.created_at.to_date }
+      fill_empty_entries(orders, params)
       orders.keys.sort.map {|key| [key.strftime('%Y-%m-%d'), orders[key].size ]}
     else
       orders = Order.find(:all, :select => 'total, created_at', :conditions => conditions(params))
-      orders = orders.group_by { |o| o.created_at.beginning_of_day }
+      orders = orders.group_by { |o| o.created_at.to_date }
+      fill_empty_entries(orders, params)
       orders.keys.sort.map {|key| [key.strftime('%Y-%m-%d'), orders[key].inject(0){|s,o| s += o.total} ]}
     end
   end

vendor/extensions/overview_dashboard/public/javascripts/dashboard.js

@@ -64,7 +64,7 @@ jQuery(document).ready(function(){
 					fontSize: '10pt',
 					textColor: '#476D9B'
 				},
-				min: 1
+				min: 0
 			},	
 			xaxis:{	 
 				renderer:$.jqplot.DateAxisRenderer,
@@ -140,4 +140,4 @@ jQuery(document).ready(function(){
 	});
 
 
-});
+});