# Change the value of a field

**URL:** <https://discuss.elastic.co/t/change-the-value-of-a-field/96590>\
**Category:** Logstash\
**Created:** [August 10, 2017, 10:49am UTC](https://discuss.elastic.co/t/change-the-value-of-a-field/96590 "2017-08-10T10:49:46Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![sentinel](https://avatars.discourse-cdn.com/v4/letter/s/fbc32d/32.png) [@sentinel](https://discuss.elastic.co/u/sentinel)\
**Post date:** [August 10, 2017, 10:49am UTC](https://discuss.elastic.co/t/change-the-value-of-a-field/96590/1 "2017-08-10T10:49:46Z")

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I have a field called showing up with a value I wish to change  
clientDisabled = false}

I want to get rid of the "}" character at the end without using too complicated a method. I have tried this:

if ([clientDisabled]=="false}") {  
clientDisabled =\> "false"  
Logstash doesn't seem to like it. Is there a simpler method without any serious overhead?

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<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:** [August 10, 2017, 11:04am UTC](https://discuss.elastic.co/t/change-the-value-of-a-field/96590/2 "2017-08-10T11:04:52Z")

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You can e.g. use a mutate filter and its `replace` option.

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<div class="post-metadata">

**Author:** ![sentinel](https://avatars.discourse-cdn.com/v4/letter/s/fbc32d/32.png) [@sentinel](https://discuss.elastic.co/u/sentinel)\
**Post date:** [August 10, 2017, 11:17am UTC](https://discuss.elastic.co/t/change-the-value-of-a-field/96590/3 "2017-08-10T11:17:05Z")

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Magnus,

Like this?

filter {  
if [clientDisabled] == "false}" {  
mutate {  
replace =\> ["clientDisabled", "false"]  
}  
}  
}

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<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:** [August 10, 2017, 11:37am UTC](https://discuss.elastic.co/t/change-the-value-of-a-field/96590/4 "2017-08-10T11:37:30Z")

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Yes, that should work.

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<div class="post-metadata">

**Author:** ![sentinel](https://avatars.discourse-cdn.com/v4/letter/s/fbc32d/32.png) [@sentinel](https://discuss.elastic.co/u/sentinel)\
**Post date:** [August 10, 2017, 11:38am UTC](https://discuss.elastic.co/t/change-the-value-of-a-field/96590/5 "2017-08-10T11:38:47Z")

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Cool. It did

Thanks

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<div class="post-metadata">

**Author:** ![sentinel](https://avatars.discourse-cdn.com/v4/letter/s/fbc32d/32.png) [@sentinel](https://discuss.elastic.co/u/sentinel)\
**Post date:** [August 10, 2017, 11:46am UTC](https://discuss.elastic.co/t/change-the-value-of-a-field/96590/6 "2017-08-10T11:46:53Z")

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Hi Magus

What if I'm finding that there are other funny characters in there like commas, tildes etc. Will it be better to apply a kv filter instead?

Like so

if ( "DiscountBlock" in [message])  
kv {  
source =\> "message"  
field\_split =\> ",'\s{}"  
remove\_field =\> "message"  
}

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<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:** [August 10, 2017, 3:03pm UTC](https://discuss.elastic.co/t/change-the-value-of-a-field/96590/7 "2017-08-10T15:03:53Z")

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Yes, maybe.

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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:** [September 7, 2017, 3:04pm UTC](https://discuss.elastic.co/t/change-the-value-of-a-field/96590/8 "2017-09-07T15:04:01Z")

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