# Custom simple field and error in using script\_fields

**URL:** <https://discuss.elastic.co/t/custom-simple-field-and-error-in-using-script-fields/57008>\
**Category:** Elasticsearch\
**Created:** [August 2, 2016, 12:54pm UTC](https://discuss.elastic.co/t/custom-simple-field-and-error-in-using-script-fields/57008 "2016-08-02T12:54:25Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Kamil\_Hurajt](https://avatars.discourse-cdn.com/v4/letter/k/49beb7/32.png) [@Kamil\_Hurajt](https://discuss.elastic.co/u/Kamil_Hurajt)\
**Post date:** [August 2, 2016, 12:54pm UTC](https://discuss.elastic.co/t/custom-simple-field-and-error-in-using-script-fields/57008/1 "2016-08-02T12:54:25Z")

</div>

Hi I would like to append to my search results just custom simple field with value, what is being changed in app process this field I need to append on that specific search results set. What I found was script fields, but is really needed to use "script\_field" to just append simple static value equal for each result of one result set ?

Also if I would like to use script\_fields to add field the PHP library is causing error

```
array(3) {
  ["body"]=>
  array(3) {
    ["query"]=>
    array(1) {
      ["bool"]=>
      array(1) {
        ["should"]=>
        array(1) {
          [0]=>
          array(1) {
            ["term"]=>
            array(1) {
              ["user_id"]=>
              string(5) "26431"
            }
          }
        }
      }
    }
    ["from"]=>
    int(0)
    ["size"]=>
    int(100)
  }
  ["script_fields"]=>
  array(1) {
    ["degree"]=>
    array(1) {
      ["script"]=>
      string(1) "1"
    }
  }
  ["_source"]=>
  array(1) {
    [0]=>
    string(1) "*"
  }
}

```

Elasticsearch\Common\Exceptions\UnexpectedValueException: script\_fields is not a valid parameter

Thanks for advice.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 10:30pm UTC](https://discuss.elastic.co/t/custom-simple-field-and-error-in-using-script-fields/57008/2 "2017-07-05T22:30:46Z")

</div>