I want to add a script_field to the result of an Elasticsearch query that performs a calculation based on the document’s score. However, I can't find a way to access the score inside the script.

I tried something like this:

GET /_search
{
  "query": { "match_all": {} },
  "script_fields": {
    "my_score": {
      "script": {
        "lang": "painless",
        "source": "return _score * 2"
      }
    }
  }
}

But this raises a "compile error" at the _score expression.

I also tried using doc['_score'].value, but it returns "No field found for [_score] in mapping."

Is there a way to access the score inside a script_field?

I want to add a script_field to the result of an Elasticsearch query that performs a calculation based on the document’s score. However, I can't find a way to access the score inside the script.

I tried something like this:

GET /_search
{
  "query": { "match_all": {} },
  "script_fields": {
    "my_score": {
      "script": {
        "lang": "painless",
        "source": "return _score * 2"
      }
    }
  }
}

But this raises a "compile error" at the _score expression.

I also tried using doc['_score'].value, but it returns "No field found for [_score] in mapping."

Is there a way to access the score inside a script_field?

• elasticsearch
• opensearch

1 Answer 1

GET /_search
{
  "query": { "match_all": {} },
  "script_fields": {
    "my_score": {
      "script": {
        "lang": "painless",
        "source": "return params['_score'] * 2"
      }
    }
  }
}