Elasticsearch: remove/update field inside nested object

Question

{
  \"_index\" : \"test\",
  \"_type\" : \"test\",
  \"_id\" : \"1212\",
  \"_version\" : 5,
  \"found\" : true,
  \"_source\" : {
    \"count\" : 42,
    \"list_dat         


        

Answer 1

I was getting error [UpdateRequest] unknown field [params] as I was using the latest version of ElasticSearch (7.9.0.), seems like the syntax is changed a bit.

Following should work for newer versions of ElasticSearch:

$ curl -XPOST 'localhost:9200/<index-name>/_update/1212'
{
  "script": {
    "source": "ctx._source.list_data.removeIf(list_item -> list_item.list_id == params.remove_id);",
    "params": {
      "remove_id": 122
    }
  }
}

Answer 2

I don't know why, but I find that

ctx._source.list_data.removeAll{it.list_id == remove_id}

can't work. Instead I use removeIf like this:

ctx._source.list_data.removeIf{list_item -> list_item.list_id == remove_id}

where list_item could be arbitrary string.

Answer 3

What worked for me was the instructions in the following link. Perhaps it is the version of ES.

Answer 4

To add a new element to your nested field you can proceed like this:

$ curl -XPOST 'localhost:9200/index/type/1212/_update?pretty' -d '
{
    "script" : "ctx._source.list_data += newElement",
    "params": {
        "newElement": {
           "list_id" : 121,
           "timestamp" : 1469050965
        }
    }
}'

To remove an existing element from your nested field list, you can proceed like this:

$ curl -XPOST 'localhost:9200/index/type/1212/_update?pretty' -d '
{
    "script" : "ctx._source.list_data.removeAll{it.list_id == remove_id}",
    "params": {
        "remove_id" : 122
    }
}'