mimnor fix add effective date and reference

shipment.py

@@ -349,7 +349,8 @@ class ShipmentDetailedReport(Report):
         shipments_id = [model + ',' + str(sh['id']) for sh in shipments]
         fields_names = [
             'product.account_category.name', 'product.name', 'product.cost_price',
-            'quantity', 'to_location.name', 'from_location.name'
+            'quantity', 'to_location.name', 'from_location.name', 'shipment.reference',
+            'effective_date'
         ]
         fields = ModelShipment.fields_get(fields_names=['operation_center', 'customer', 'supplier'])
         if 'operation_center' in fields.keys():
@@ -445,6 +446,8 @@ class ShipmentDetailedReport(Report):
                     records[key]['last_cost'] = m['last_cost']
                 except:
                     records[key] = m
+                    records[key]['shipment.']['reference'] = ''
+                    records[key]['effective_date'] = ''
             report_context['records'] = records.values()
 
         report_context['company'] = company