Update_By_Query in elasticsearch_dsl matches <field> but doesn't match <object>.<field>

Elastic Stack Elasticsearch
2

Solved with the following:

update = ubq.script(source="ctx._source.object_name.field_name = params.new_ap_name; ctx._source.radio.Accesspoint_name = params.new_ap_name; ",
         lang="painless",
         params={ "new_ap_name": "new_field_value"  }).update_from_dict({
                    "query": {
                           "bool": {
                                  "must": [
                                         {   "match": {  "object_name.field_name": "new_field_value" } },
                                         {   "match": { "account_name": "Filters documents of specific customer" } }
                                   ]
                            }
                         }
}).params(request_timeout=3600).params(wait_for_completion=False).params(wait_for_active_shards=1).params(refresh=True)
response = update.execute()

The old and new field values can be provided by your python script.
hope this helps