Elasticsearch exclude top hit on field value

Question

{\'country\': \'France\', \'collected\': \'2018-03-12\', \'active\': true}
{\'country\': \'France\', \'collected\': \'2018-03-13\', \'active\': true}
{\'country\': \         


        

Answer 1

I think you can get away with sorting by two fields in your top_hits: by active and by collected. Basically, you want trues to be first and when equal, then sort by collected. Something like the following will always show the active:true documents sorted by collected.

The only downside to this solution is that if you don't have any active documents, top_hits will show one active:false document.

{
  "size": 0,
  "aggs": {
    "group": {
      "terms": {
        "field": "country"
      },
      "aggs": {
        "group_docs": {
          "top_hits": {
            "size": 1,
            "sort": [
              {
                "active": {
                  "order": "desc"
                }, 
                "collected": {
                  "order": "desc"
                }
              }
            ]
          }
        }
      }
    }
  }
}