ElasticSearch - Ordering aggregation by nested aggregation on nested field

Question

{
  "query": {
    "match_all": {}
  },
  "from": 0,
  "size": 0,
  "aggs": {
    "itineraryId": {
               


        

Answer 1

As Val has pointed out in the comments ES does not support it yet.

Till then you can first aggregate the nested aggregation and then use the reverse nested aggregation to aggregate the duration, that is present in the root of the document.

https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-reverse-nested-aggregation.html