# Create Rules in kibana-\> unknown field \[aggs\]

**URL:** <https://discuss.elastic.co/t/create-rules-in-kibana-unknown-field-aggs/346522>\
**Category:** Elasticsearch\
**Tags:** painless, kql-kibana-query-language\
**Created:** [November 6, 2023, 12:19pm UTC](https://discuss.elastic.co/t/create-rules-in-kibana-unknown-field-aggs/346522 "2023-11-06T12:19:02Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![INS](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ins/32/92827_2.png) [@INS](https://discuss.elastic.co/u/INS)\
**Post date:** [November 6, 2023, 12:19pm UTC](https://discuss.elastic.co/t/create-rules-in-kibana-unknown-field-aggs/346522/1 "2023-11-06T12:19:03Z")

</div>

Hi  
I need to create some rules in kibana over aggregation function  
but I don't understand what's wrong I got "Error testing query: EsError: [1:118] unknown field [aggs]"

 ![aggs](https://us1.discourse-cdn.com/elastic/original/3X/8/b/8b8b365cc44c7ea86112193f723606481f668edf.jpeg)

```auto
{
  "query":{

  "aggs": {
    "last_values": {
      "terms": {
        "field": "RPTDATETIME",
        "size": 1,
        "order": {
          "_key": "desc"
        }
      },
      "aggs": {
        "last_a_value": {
          "max": {
            "field": "ECCNGLV1"
          }
        },
        "last_b_value": {
          "max": {
            "field": "ECCNGLV2"
          }
        },
        "last_c_value": {
          "max": {
            "field": "ECCNGLV3"
          }
        }
      }
    }
  },
  "script_fields": {
    "sum_of_last_values": {
      "script": {
        "source": "params['_source']['last_a_value'] + params['_source']['last_b_value'] + params['_source']['last_c_value']",
        "lang": "painless"
      }
    }
  }
}

}

```

---

<div class="post-metadata">

**Author:** ![INS](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ins/32/92827_2.png) [@INS](https://discuss.elastic.co/u/INS)\
**Post date:** [November 9, 2023, 5:53pm UTC](https://discuss.elastic.co/t/create-rules-in-kibana-unknown-field-aggs/346522/2 "2023-11-09T17:53:10Z")

</div>

Hi Can anyone have any idea? How to set such rule?

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<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:** [December 7, 2023, 5:53pm UTC](https://discuss.elastic.co/t/create-rules-in-kibana-unknown-field-aggs/346522/3 "2023-12-07T17:53:12Z")

</div>

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