# Converting a new field

**URL:** <https://discuss.elastic.co/t/converting-a-new-field/191019>\
**Category:** Logstash\
**Created:** [July 17, 2019, 2:04pm UTC](https://discuss.elastic.co/t/converting-a-new-field/191019 "2019-07-17T14:04:54Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![luc1](https://avatars.discourse-cdn.com/v4/letter/l/e79b87/32.png) [@luc1](https://discuss.elastic.co/u/luc1)\
**Post date:** [July 17, 2019, 2:04pm UTC](https://discuss.elastic.co/t/converting-a-new-field/191019/1 "2019-07-17T14:04:54Z")

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Hello,

In my logstash filter I created a new field with a condition which works.

> if "ntf" in [entities][sdn]{  
> mutate{add\_field=\>["VNFc","ntf"]}}

Now, this VNFc field appear with a "?" in Kibana, so it can't be use for a control visualization ... I tried to put :

> mutate {convert =\> {"VNFc" =\> "string"}}  
> }

But if the field is created after the parsing I guess it can't work.  
[entities][sdn] is a string field though, but VNFc isn't.

Ty for your help 🙂

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**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [July 17, 2019, 2:18pm UTC](https://discuss.elastic.co/t/converting-a-new-field/191019/2 "2019-07-17T14:18:02Z")

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If you do a refresh on the index pattern in Kibana does it fix that?

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<div class="post-metadata">

**Author:** ![luc1](https://avatars.discourse-cdn.com/v4/letter/l/e79b87/32.png) [@luc1](https://discuss.elastic.co/u/luc1)\
**Post date:** [July 17, 2019, 3:08pm UTC](https://discuss.elastic.co/t/converting-a-new-field/191019/3 "2019-07-17T15:08:41Z")

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no it doesn't

I even created a new index to test

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<div class="post-metadata">

**Author:** ![luc1](https://avatars.discourse-cdn.com/v4/letter/l/e79b87/32.png) [@luc1](https://discuss.elastic.co/u/luc1)\
**Post date:** [July 17, 2019, 3:41pm UTC](https://discuss.elastic.co/t/converting-a-new-field/191019/4 "2019-07-17T15:41:16Z")

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Ok i commented a line which was :

> #mutate{split =\> { "[entities][sdn]"=\>"/"}

and it worked, thanks for your response though

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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:** [August 14, 2019, 3:41pm UTC](https://discuss.elastic.co/t/converting-a-new-field/191019/5 "2019-08-14T15:41:22Z")

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