# Logstash ruby length does not count correctly

**URL:** https://discuss.elastic.co/t/logstash-ruby-length-does-not-count-correctly/284323
**Category:** Logstash
**Created:** [September 15, 2021, 7:20pm UTC](https://discuss.elastic.co/t/logstash-ruby-length-does-not-count-correctly/284323 "2021-09-15T19:20:41Z")
**Posts on this page:** 4
**Page:** 1

<div class="post-metadata">

### Author: ![Rauly\_Koto](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rauly_koto/32/79589_2.png) [@Rauly\_Koto](https://discuss.elastic.co/u/Rauly_Koto)
#### Post date: [September 15, 2021, 7:20pm UTC](https://discuss.elastic.co/t/logstash-ruby-length-does-not-count-correctly/284323/1 "2021-09-15T19:20:41Z")

</div>

The execution\_length\_output count string correctly, but execution\_length\_input string is to low.

ruby {  
code =\> "event.set('execution\_length\_output', event.get('[execution][output]').length)  
event.set('execution\_length\_iput', event.get('[execution][input]').length)"  
}

---

<div class="post-metadata">

### Author: ![aaron-nimocks](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/aaron-nimocks/32/73965_2.png) [@aaron-nimocks](https://discuss.elastic.co/u/aaron-nimocks)
#### Post date: [September 15, 2021, 7:54pm UTC](https://discuss.elastic.co/t/logstash-ruby-length-does-not-count-correctly/284323/2 "2021-09-15T19:54:51Z")

</div>

This should work.

**Conf**

```auto
input { generator { lines => ['{"execution.output":"five1", "execution.input": "sixsix"}'] count => 1 codec => "json" } }
filter {
  	ruby {
      code => '
        event.set("execution_length_output", event.get("execution.output").length)
        event.set("execution_length_input", event.get("execution.input").length)
      '      
  	}
}
output { stdout { codec => "json" } }

```

**Output**

```auto
{
  "execution.output": "five1",
  "execution_length_input": 6,
  "execution_length_output": 5,
  "execution.input": "sixsix"
}

```

---

<div class="post-metadata">

### Author: ![Rauly\_Koto](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rauly_koto/32/79589_2.png) [@Rauly\_Koto](https://discuss.elastic.co/u/Rauly_Koto)
#### Post date: [September 20, 2021, 1:19pm UTC](https://discuss.elastic.co/t/logstash-ruby-length-does-not-count-correctly/284323/3 "2021-09-20T13:19:19Z")

</div>

thx for help!

---

<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: [October 18, 2021, 1:19pm UTC](https://discuss.elastic.co/t/logstash-ruby-length-does-not-count-correctly/284323/4 "2021-10-18T13:19:40Z")

</div>

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