# Remove array field if empty 6.1 version

**URL:** <https://discuss.elastic.co/t/remove-array-field-if-empty-6-1-version/122022>\
**Category:** Logstash\
**Created:** [March 1, 2018, 9:57am UTC](https://discuss.elastic.co/t/remove-array-field-if-empty-6-1-version/122022 "2018-03-01T09:57:32Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![Eswar\_Kumar\_Musiboin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/eswar_kumar_musiboin/32/28623_2.png) [@Eswar\_Kumar\_Musiboin](https://discuss.elastic.co/u/Eswar_Kumar_Musiboin)\
**Post date:** [March 1, 2018, 9:57am UTC](https://discuss.elastic.co/t/remove-array-field-if-empty-6-1-version/122022/1 "2018-03-01T09:57:32Z")

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Please suggest how to remove array field if empty? I have tried below config :  
Logstash version is : 6.1.1

if [tags] == [] {  
mutate {  
remove\_field =\> ["tags"]  
}  
}

But getting logstash exception:  
[2018-03-01T15:07:56,000][FATAL][logstash.runner] The given configuration is invalid. Reason: Failed to parse right-hand side of conditional [str]pipeline:31:8:`[tags] == []`

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<div class="post-metadata">

**Author:** ![Eswar\_Kumar\_Musiboin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/eswar_kumar_musiboin/32/28623_2.png) [@Eswar\_Kumar\_Musiboin](https://discuss.elastic.co/u/Eswar_Kumar_Musiboin)\
**Post date:** [March 1, 2018, 2:30pm UTC](https://discuss.elastic.co/t/remove-array-field-if-empty-6-1-version/122022/2 "2018-03-01T14:30:29Z")

</div>

found solution

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<div class="post-metadata">

**Author:** ![rcowart](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rcowart/32/88091_2.png) [@rcowart](https://discuss.elastic.co/u/rcowart)\
**Post date:** [March 1, 2018, 3:14pm UTC](https://discuss.elastic.co/t/remove-array-field-if-empty-6-1-version/122022/3 "2018-03-01T15:14:21Z")

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Please share it, so that others might find it in the future.

Thanks.

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<div class="post-metadata">

**Author:** ![Eswar\_Kumar\_Musiboin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/eswar_kumar_musiboin/32/28623_2.png) [@Eswar\_Kumar\_Musiboin](https://discuss.elastic.co/u/Eswar_Kumar_Musiboin)\
**Post date:** [March 7, 2018, 12:05pm UTC](https://discuss.elastic.co/t/remove-array-field-if-empty-6-1-version/122022/4 "2018-03-07T12:05:49Z")

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```
ruby {
        code => 'event.set("[is_tags_empty]", "true") if event.get("[tags]").length == 0'
    }

    if [is_tags_empty] {
        mutate {
            remove_field => ["tags","is_tags_empty"]
        }
    }
```

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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:** [April 4, 2018, 12:05pm UTC](https://discuss.elastic.co/t/remove-array-field-if-empty-6-1-version/122022/5 "2018-04-04T12:05:50Z")

</div>

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