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Elastic Docs ›Painless Scripting Language [7.9] ›Painless contexts

Sort context

edit

Sort context

edit

Use a Painless script to sort the documents in a query.

Variables

params (Map, read-only)
User-defined parameters passed in as part of the query.
doc (Map, read-only)
Contains the fields of the current document. For single-valued fields, the value can be accessed via doc['fieldname'].value. For multi-valued fields, this returns the first value; other values can be accessed via doc['fieldname'].get(index)
_score (double read-only)
The similarity score of the current document.

Return

double
The score for the specified document.

API

The standard Painless API is available.

Example

To run this example, first follow the steps in context examples.

To sort results by the length of the theatre field, submit the following query:

GET /_search
{
  "query": {
    "term": {
      "sold": "true"
    }
  },
  "sort": {
    "_script": {
      "type": "number",
      "script": {
        "lang": "painless",
        "source": "doc['theatre'].value.length() * params.factor",
        "params": {
          "factor": 1.1
        }
      },
      "order": "asc"
    }
  }
}
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