CM-887: update json_ext on update (#82)

Co-authored-by: Jan <j.dolkowski@soldevelo.com>

individual/services.py

@@ -50,6 +50,7 @@ def create(self, obj_data):
 
     @register_service_signal('individual_service.update')
     def update(self, obj_data):
+        self._update_json_ext(obj_data)
         return super().update(obj_data)
 
     @register_service_signal('individual_service.delete')
@@ -103,6 +104,22 @@ def select_individuals_to_benefit_plan(self, custom_filters, benefit_plan_id, st
     def create_accept_enrolment_task(self, individual_queryset, benefit_plan_id):
         pass
 
+    def _update_json_ext(self, obj_data):
+        if not obj_data or 'json_ext' not in obj_data:
+            return
+
+        json_ext = obj_data['json_ext']
+        if not json_ext:
+            return
+
+        for field in ('first_name', 'last_name', 'dob'):
+            individual_field_value = obj_data.get(field)
+            json_ext_value = json_ext.get(field)
+            if json_ext_value and json_ext_value != individual_field_value:
+                json_ext[field] = individual_field_value
+
+        obj_data['json_ext'] = json_ext
+
     OBJECT_TYPE = Individual
 
     def __init__(self, user, validation_class=IndividualValidation):