Handle ObjectDoesNotExist for related instances

Author: dsanders11

django_elasticsearch_dsl/registries.py

@@ -1,6 +1,7 @@
 from collections import defaultdict
 from itertools import chain
 
+from django.core.exceptions import ObjectDoesNotExist
 from django.utils.six import itervalues, iterkeys, iteritems
 
 from .apps import DEDConfig
@@ -43,7 +44,11 @@ def update_related(self, instance, **kwargs):
 
         for doc in self._get_related_doc(instance):
             doc_instance = doc()
-            related = doc_instance.get_instances_from_related(instance)
+            try:
+                related = doc_instance.get_instances_from_related(instance)
+            except ObjectDoesNotExist:
+                related = None
+
             if related is not None:
                 doc_instance.update(related, **kwargs)