Serialise org notes and billing details

app/models.py

@@ -434,6 +434,11 @@ class Organisation(db.Model):
             "domains": self.domain_list,
             "request_to_go_live_notes": self.request_to_go_live_notes,
             "count_of_live_services": len(self.live_services),
+            "notes": self.notes,
+            "purchase_order_number": self.purchase_order_number,
+            "billing_contact_names": self.billing_contact_names,
+            "billing_contact_email_addresses": self.billing_contact_email_addresses,
+            "billing_reference": self.billing_reference,
         }
 
     def serialize_for_list(self):

tests/app/organisation/test_rest.py

@@ -77,6 +77,11 @@ def test_get_organisation_by_id(admin_request, notify_db_session):
         'domains',
         'request_to_go_live_notes',
         'count_of_live_services',
+        'notes',
+        'billing_contact_names',
+        'billing_contact_email_addresses',
+        'billing_reference',
+        'purchase_order_number'
     }
     assert response['id'] == str(org.id)
     assert response['name'] == 'test_org_1'
@@ -93,6 +98,11 @@ def test_get_organisation_by_id(admin_request, notify_db_session):
     assert response['count_of_live_services'] == 0
     assert response['agreement_signed_on_behalf_of_name'] is None
     assert response['agreement_signed_on_behalf_of_email_address'] is None
+    assert response['notes'] is None
+    assert response['billing_contact_names'] is None
+    assert response['billing_contact_email_addresses'] is None
+    assert response['billing_reference'] is None
+    assert response['purchase_order_number'] is None
 
 
 def test_get_organisation_by_id_returns_domains(admin_request, notify_db_session):