# Vega: Field collapsing and inner hits not working for Vega visualization **URL:** \ **Category:** Kibana\ **Tags:** vega\ **Created:** [December 10, 2020, 8:59am UTC](https://discuss.elastic.co/t/vega-field-collapsing-and-inner-hits-not-working-for-vega-visualization/258233 "2020-12-10T08:59:29Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![ege](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ege/32/80438_2.png) [@ege](https://discuss.elastic.co/u/ege)\ **Post date:** [December 10, 2020, 8:59am UTC](https://discuss.elastic.co/t/vega-field-collapsing-and-inner-hits-not-working-for-vega-visualization/258233/1 "2020-12-10T08:59:29Z")
Hi, I have an index with two fields; **ID** and **Status**. Each ID will have 3 statuses; **start** , **pending** and **end** , which are included in the same index. What I want to achieve is to get the _ **last status** _ for each ID from the index so that I can use it with a Vega visualization to create a pie-chart. I'm trying to **collapse search results based on field values**. Here's the API call I tried on my index. ``` GET /demo*/_search { "collapse": { "field": "ID.keyword", "inner_hits": { "name": "by_status", "collapse": { "field": "Status.keyword" }, "sort": [ { "Status.keyword": { "order": "asc" } } ], "size": 1 } }, "sort": [ { "ID.keyword": { "order": "asc" } } ] } ``` It delivers the need to get the _last status_ for each ID. Here's the response from Elasticsearch. ``` { "took" : 5, "timed_out" : false, "_shards" : { "total" : 2, "successful" : 2, "skipped" : 0, "failed" : 0 }, "hits" : { "total" : { "value" : 16, "relation" : "eq" }, "max_score" : null, "hits" : [ { "_index" : "demo-index", "_type" : "_doc", "_id" : "0b2JR3YBsgdxC8Q2vhg5", "_score" : null, "_source" : { "message" : "1,start", "host" : "host-computer", "ID" : "1", "@timestamp" : "2020-12-09T12:46:16.532Z", "Status" : "start", "path" : "/path/to/the/data/file.csv", "@version" : "1" }, "fields" : { "ID.keyword" : [ "1" ] }, "sort" : [ "1" ], "inner_hits" : { "by_status" : { "hits" : { "total" : { "value" : 3, "relation" : "eq" }, "max_score" : null, "hits" : [ { "_index" : "demo-index", "_type" : "_doc", "_id" : "2L2JR3YBsgdxC8Q2whgP", "_score" : null, "_source" : { "message" : "1,end", "host" : "host-computer", "ID" : "1", "@timestamp" : "2020-12-09T12:46:16.586Z", "Status" : "end", "path" : "/path/to/the/data/file.csv", "@version" : "1" }, "fields" : { "Status.keyword" : [ "end" ] }, "sort" : [ "end" ] } ] } } } }, { "_index" : "demo-index", "_type" : "_doc", "_id" : "0r2JR3YBsgdxC8Q2vhjG", "_score" : null, "_source" : { "message" : "2,start", "host" : "host-computer", "ID" : "2", "@timestamp" : "2020-12-09T12:46:16.588Z", "Status" : "start", "path" : "/path/to/the/data/file.csv", "@version" : "1" }, "fields" : { "ID.keyword" : [ "2" ] }, "sort" : [ "2" ], "inner_hits" : { "by_status" : { "hits" : { "total" : { "value" : 2, "relation" : "eq" }, "max_score" : null, "hits" : [ { "_index" : "demo-index", "_type" : "_doc", "_id" : "072JR3YBsgdxC8Q2vhjG", "_score" : null, "_source" : { "message" : "2,end", "host" : "host-computer", "ID" : "2", "@timestamp" : "2020-12-09T12:46:16.588Z", "Status" : "end", "path" : "/path/to/the/data/file.csv", "@version" : "1" }, "fields" : { "Status.keyword" : [ "end" ] }, "sort" : [ "end" ] } ] } } } }, { "_index" : "demo-index", "_type" : "_doc", "_id" : "1L2JR3YBsgdxC8Q2vhjG", "_score" : null, "_source" : { "message" : "3,start", "host" : "host-computer", "ID" : "3", "@timestamp" : "2020-12-09T12:46:16.589Z", "Status" : "start", "path" : "/path/to/the/data/file.csv", "@version" : "1" }, "fields" : { "ID.keyword" : [ "3" ] }, "sort" : [ "3" ], "inner_hits" : { "by_status" : { "hits" : { "total" : { "value" : 3, "relation" : "eq" }, "max_score" : null, "hits" : [ { "_index" : "demo-index", "_type" : "_doc", "_id" : "1r2JR3YBsgdxC8Q2vhjG", "_score" : null, "_source" : { "message" : "3,end", "host" : "host-computer", "ID" : "3", "@timestamp" : "2020-12-09T12:46:16.590Z", "Status" : "end", "path" : "/path/to/the/data/file.csv", "@version" : "1" }, "fields" : { "Status.keyword" : [ "end" ] }, "sort" : [ "end" ] } ] } } } } ] } } ``` I tried using the same collapse in Vega as the body of the data field as shown below. ``` "data": [ { "name": "table", "url": { "%context%": true, "%timefield%": "@timestamp", "index": "demo*", "body": { "collapse": { "field": "ID.keyword", "inner_hits": { "name": "by_location", "collapse": {"field": "Status.keyword"}, "sort": [{"Status.keyword": {"order": "asc"}}], "size": 1 } }, "sort": [{"ID.keyword": {"order": "asc"}}] } }, "format": { "property": "hits.hits.inner_hits.by_status.hits.hits.fields" }, "transform": [{"type": "pie", "field": "Status.keyword"}] } ] ``` But it produces an error. ![Issue_Image](https://us1.discourse-cdn.com/elastic/original/3X/4/2/42431fbeae4fdecb2a0c762191b83bdacb2b2e11.png) What am I doing wrong? Is using a **collapse search** in Vega not possible? Is there any alternative way for achieving this requirement in Vega or any other type of visualization? Any help would be greatly appreciated. 😊 Cheers! ---
**Author:** ![ege](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ege/32/80438_2.png) [@ege](https://discuss.elastic.co/u/ege)\ **Post date:** [December 10, 2020, 4:06pm UTC](https://discuss.elastic.co/t/vega-field-collapsing-and-inner-hits-not-working-for-vega-visualization/258233/2 "2020-12-10T16:06:39Z")
Well, apparantly, **collapse** is a feature of document search, not aggregations. Followed a wrong path there. 😅 ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [January 7, 2021, 4:06pm UTC](https://discuss.elastic.co/t/vega-field-collapsing-and-inner-hits-not-working-for-vega-visualization/258233/3 "2021-01-07T16:06:41Z")
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