load-pratic-ldif: allow modifying existing service instances

src/authentic2_pratic/management/commands/load-pratic-ldif.py

@@ -148,10 +148,17 @@ class PraticLDIFParser(ldif.LDIFParser):
             service = self.services[entry['cdg59serviceType'][0]]
             if not service.is_global and 'service_url' not in others:
                 others['service_url'] = 'http://missing-url-%s.com' % others['slug']
-            service_instance = ServiceInstance(
+            try:
+                service_instance = ServiceInstance.objects.get(
                     collectivity=collectivity,
-                    service=service,
-                    **others)
+                    service=service)
+                for k, v in others.iteritems():
+                    setattr(service_instance, k, v)
+            except ServiceInstance.DoesNotExist:
+                service_instance = ServiceInstance(
+                        collectivity=collectivity,
+                        service=service,
+                        **others)
             try:
                 service_instance.clean()
             except ValidationError, e: