# Array of objects datatype exists **URL:** \ **Category:** Elasticsearch\ **Created:** [July 1, 2017, 5:36pm UTC](https://discuss.elastic.co/t/array-of-objects-datatype-exists/91524 "2017-07-01T17:36:03Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![WisdomPill](https://avatars.discourse-cdn.com/v4/letter/w/dfb087/32.png) [@WisdomPill](https://discuss.elastic.co/u/WisdomPill)\ **Post date:** [July 1, 2017, 5:36pm UTC](https://discuss.elastic.co/t/array-of-objects-datatype-exists/91524/1 "2017-07-01T17:36:03Z")
I have a field called alarm\_images where I store a list of objects with three fields download\_date, index and url. I wanted to lighten my mapping since I was using lot of memory for lot of fields and I wanted to disable doc\_values and index for all values since I only have to retrieve the list with the rest of the document every once in a while. My problem is that I have to check if alarm\_images object exists and using a mapping like the following I always get that alarm\_images does not exist while it does. ``` "alarm_images": { "type": "nested", "properties": { "download_date": { "type": "date", "index": false, "doc_values": false }, "index": { "type": "integer", "index": false, "doc_values": false }, "url": { "type": "keyword", "index": false, "doc_values": false } } ``` is there any way to use nested object without index and doc\_values and still preserve the capability to check if the field exists? ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [July 1, 2017, 5:55pm UTC](https://discuss.elastic.co/t/array-of-objects-datatype-exists/91524/2 "2017-07-01T17:55:15Z")
I believe that one of the easiest way is to add a boolean value. You can compute it may be at index time using an ingest script processor. ---
**Author:** ![WisdomPill](https://avatars.discourse-cdn.com/v4/letter/w/dfb087/32.png) [@WisdomPill](https://discuss.elastic.co/u/WisdomPill)\ **Post date:** [July 1, 2017, 7:31pm UTC](https://discuss.elastic.co/t/array-of-objects-datatype-exists/91524/3 "2017-07-01T19:31:06Z")
I am new to ingest node, I've only used it with the basic pipeline plugins. How can I add a field based on a condition? I tried using script pipeline but I got stuck adding the new field to the document. Should I use another pipeline? This is what I got so far. ```json POST _ingest/pipeline/_simulate { "pipeline": { "description": "checks if the image field is populated", "processors": [ { "script": { "lang": "painless", "inline": "if(ctx._source?.image != null){ctx._source.has_image = true} else {ctx._source.has_image = false}" } } ] }, "docs": [ { "_index": "sensor-2017-06-30", "_type": "status", "_id": "id", "_source": { "image": { "url": "image.jpg", "download_type": "last", "download_date": "2017-06-30T06:33:56.092611+00:00" } } } ] } ``` ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [July 1, 2017, 7:50pm UTC](https://discuss.elastic.co/t/array-of-objects-datatype-exists/91524/4 "2017-07-01T19:50:14Z")
Is it a typo? ``` ctx._source?.image != null ``` Should it be ``` ctx._source.image != null ``` ---
**Author:** ![WisdomPill](https://avatars.discourse-cdn.com/v4/letter/w/dfb087/32.png) [@WisdomPill](https://discuss.elastic.co/u/WisdomPill)\ **Post date:** [July 1, 2017, 8:14pm UTC](https://discuss.elastic.co/t/array-of-objects-datatype-exists/91524/5 "2017-07-01T20:14:05Z")
I solved my issue! 🙂 It was not the typo you suggested. With the first one ```auto ctx._source?.image != null ``` I get always false in the condition while with the second ```auto ctx._source.image != null ``` I get a NullPointerException, This is the solution I came with, actually I don't know why it works since I though I had to add \_source after ctx. Thank you for your quick responsiveness. Have a nice day. ```json POST _ingest/pipeline/_simulate { "pipeline": { "description": "checks if image and alarm_images field is populated", "processors": [ { "script": { "lang": "painless", "inline": "if(ctx.image != null){ctx.has_image = true} else {ctx.has_image = false}" } }, { "script": { "lang": "painless", "inline": "if(ctx.alarm_images != null){ctx.has_alarm_image = true} else {ctx.has_alarm_image = false}" } } ] }, "docs": [ { "_index": "sensor-2017-06-30", "_type": "status", "_id": "id", "_source": { "image": { "url": "image.jpg", "download_type": "last", "download_date": "2017-06-30T06:33:56.092611+00:00" } } }, { "_index": "sensor-2017-06-30", "_type": "status", "_id": "id", "_source": { "message": "painless is not painless" } }, { "_index": "sensor-2017-06-30", "_type": "status", "_id": "id", "_source": { "alarm_images": [ { "url": "alarm_image.jpg", "index": 0, "download_date": "2017-06-30T06:34:07.744397+00:00" }, { "url": "alarm_image.jpg", "index": 1, "download_date": "2017-06-30T06:34:08.851667+00:00" } ] } } ] } ``` ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 29, 2017, 8:14pm UTC](https://discuss.elastic.co/t/array-of-objects-datatype-exists/91524/6 "2017-07-29T20:14:33Z")
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