# How to convert a field string to list in logstash

**URL:** <https://discuss.elastic.co/t/how-to-convert-a-field-string-to-list-in-logstash/88795>\
**Category:** Logstash\
**Created:** [June 9, 2017, 6:45am UTC](https://discuss.elastic.co/t/how-to-convert-a-field-string-to-list-in-logstash/88795 "2017-06-09T06:45:24Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![Tianrui](https://avatars.discourse-cdn.com/v4/letter/t/898d66/32.png) [@Tianrui](https://discuss.elastic.co/u/Tianrui)\
**Post date:** [June 9, 2017, 6:45am UTC](https://discuss.elastic.co/t/how-to-convert-a-field-string-to-list-in-logstash/88795/1 "2017-06-09T06:45:24Z")

</div>

HI,  
How to convert string field to list in logstash.

This is my field data.  
"http\_urls" =\> "['[http://11](http://11)', '[http://22](http://22)']"

How should I write in my logstash's config?  
How modify it on my code?  
mutate {  
convert =\> [  
"http\_urls", "???"  
]  
}

Thanks.

---

<div class="post-metadata">

**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [June 9, 2017, 7:44am UTC](https://discuss.elastic.co/t/how-to-convert-a-field-string-to-list-in-logstash/88795/2 "2017-06-09T07:44:25Z")

</div>

You're asking about how to convert a string into a list, but the example you give _is_ a list. Please clarify what you're trying to do and why you want to do this.

---

<div class="post-metadata">

**Author:** ![Tianrui](https://avatars.discourse-cdn.com/v4/letter/t/898d66/32.png) [@Tianrui](https://discuss.elastic.co/u/Tianrui)\
**Post date:** [June 9, 2017, 7:59am UTC](https://discuss.elastic.co/t/how-to-convert-a-field-string-to-list-in-logstash/88795/3 "2017-06-09T07:59:32Z")

</div>

I'm using logstash from to filebeat and output to elasticsearch.  
I want to convert the field http\_urls's type from string to list through the logstash's filter.

---

<div class="post-metadata">

**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [June 9, 2017, 8:03am UTC](https://discuss.elastic.co/t/how-to-convert-a-field-string-to-list-in-logstash/88795/4 "2017-06-09T08:03:52Z")

</div>

Then perhaps you're looking for the mutate filter's `split` option.

---

<div class="post-metadata">

**Author:** ![Tianrui](https://avatars.discourse-cdn.com/v4/letter/t/898d66/32.png) [@Tianrui](https://discuss.elastic.co/u/Tianrui)\
**Post date:** [June 9, 2017, 9:05am UTC](https://discuss.elastic.co/t/how-to-convert-a-field-string-to-list-in-logstash/88795/5 "2017-06-09T09:05:09Z")

</div>

Oh! It's succeed. Thank you very much !

---

<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:** [July 7, 2017, 9:05am UTC](https://discuss.elastic.co/t/how-to-convert-a-field-string-to-list-in-logstash/88795/6 "2017-07-07T09:05:19Z")

</div>

Closed on July 7, 2017, 9:05am UTC

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.