# Mixed arrays and doubles in elasticsearch (jdbc importer) **URL:** \ **Category:** Elasticsearch\ **Created:** [December 12, 2016, 11:14am UTC](https://discuss.elastic.co/t/mixed-arrays-and-doubles-in-elasticsearch-jdbc-importer/68702 "2016-12-12T11:14:36Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Lars2](https://avatars.discourse-cdn.com/v4/letter/l/4bbf92/32.png) [@Lars2](https://discuss.elastic.co/u/Lars2)\ **Post date:** [December 12, 2016, 11:14am UTC](https://discuss.elastic.co/t/mixed-arrays-and-doubles-in-elasticsearch-jdbc-importer/68702/1 "2016-12-12T11:14:36Z")
Hey, I have a field in ElasticSearch. Sometimes it is filled by one double (for example: 18). But it could also have multiple doubles (for example: 18 and 19). Elasticsearch automatically converts the record swith multiple values to an array. But the record with one value stays a double. Now the problem is that I am trying to retrieve the record from elaticsearch using Nest. But i am getting the following error: `Error converting value 18 to type 'System.Int32[]'. Path 'hits.hits[0]._source.typegroups', line 1, position 10673.` This is because it is trying to map to a record with datatype int[] when in fact it could also be int. Is there any way I can save all values to elastic as an array (even if there is only one). Or is there any way to retrieve the values to my .NET application. I know i could ad brackets when putting data in Elasticsearch (for example [18]) so it would always be an array. But i am feeding my data with the jdbc importer. thanks in advance. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [January 9, 2017, 11:15am UTC](https://discuss.elastic.co/t/mixed-arrays-and-doubles-in-elasticsearch-jdbc-importer/68702/2 "2017-01-09T11:15:20Z")
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