populate event children list via parent_uuid

awx/api/serializers.py

@@ -4124,8 +4124,7 @@ class JobEventSerializer(BaseSerializer):
         ))
         if obj.parent_id:
             res['parent'] = self.reverse('api:job_event_detail', kwargs={'pk': obj.parent_id})
-        if obj.children.exists():
-            res['children'] = self.reverse('api:job_event_children_list', kwargs={'pk': obj.pk})
+        res['children'] = self.reverse('api:job_event_children_list', kwargs={'pk': obj.pk})
         if obj.host_id:
             res['host'] = self.reverse('api:host_detail', kwargs={'pk': obj.host_id})
         if obj.hosts.exists():

awx/api/views/__init__.py

@@ -3864,6 +3864,12 @@ class JobEventChildrenList(SubListAPIView):
     view_name = _('Job Event Children List')
     search_fields = ('stdout',)
 
+    def get_queryset(self):
+        parent_event = self.get_parent_object()
+        self.check_parent_access(parent_event)
+        qs = self.request.user.get_queryset(self.model).filter(parent_uuid=parent_event.uuid)
+        return qs
+
 
 class JobEventHostsList(HostRelatedSearchMixin, SubListAPIView):
 

awx/main/access.py

@@ -2264,7 +2264,7 @@ class JobEventAccess(BaseAccess):
     '''
 
     model = JobEvent
-    prefetch_related = ('hosts', 'children', 'job__job_template', 'host',)
+    prefetch_related = ('hosts', 'job__job_template', 'host',)
 
     def filtered_queryset(self):
         return self.model.objects.filter(