# Can I use grok filter on a nested filed

**URL:** <https://discuss.elastic.co/t/can-i-use-grok-filter-on-a-nested-filed/55839>\
**Category:** Logstash\
**Created:** [July 19, 2016, 7:54am UTC](https://discuss.elastic.co/t/can-i-use-grok-filter-on-a-nested-filed/55839 "2016-07-19T07:54:36Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![gfafei](https://avatars.discourse-cdn.com/v4/letter/g/a5b964/32.png) [@gfafei](https://discuss.elastic.co/u/gfafei)\
**Post date:** [July 19, 2016, 7:54am UTC](https://discuss.elastic.co/t/can-i-use-grok-filter-on-a-nested-filed/55839/1 "2016-07-19T07:54:36Z")

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The log like this:  
{  
meta:{ path: '/app/app1'}  
}  
and my filter like this:  
grok {  
'meta.path' =\> '/app/%{WORD:appid}'  
}

it didn't work.  
How can I get the result I want?

---

<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:** [July 19, 2016, 9:59am UTC](https://discuss.elastic.co/t/can-i-use-grok-filter-on-a-nested-filed/55839/2 "2016-07-19T09:59:27Z")

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[https://www.elastic.co/guide/en/logstash/current/event-dependent-configuration.html#logstash-config-field-references](https://www.elastic.co/guide/en/logstash/current/event-dependent-configuration.html#logstash-config-field-references)

---

<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 6, 2017, 4:47am UTC](https://discuss.elastic.co/t/can-i-use-grok-filter-on-a-nested-filed/55839/3 "2017-07-06T04:47:28Z")

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