OpenConceptLab/ocl_issues#1008 | Collection ref add/delete will updat…

…e child count

core/collections/models.py

@@ -265,6 +265,7 @@ def add_references(self, expressions, user=None):  # pylint: disable=too-many-lo
             collection_version.updated_by = user
             self.updated_by = user
         collection_version.save()
+        collection_version.update_children_counts()
         if collection_version.id != self.id:
             self.save()
         return added_references, errors
@@ -297,6 +298,7 @@ def delete_references(self, expressions):
 
         from core.concepts.documents import ConceptDocument
         from core.mappings.documents import MappingDocument
+        head.update_children_counts()
         self.batch_index(Concept.objects.filter(uri__in=expressions), ConceptDocument)
         self.batch_index(Mapping.objects.filter(uri__in=expressions), MappingDocument)