# Logstash: How to replace field values in JSON based on ID

**URL:** <https://discuss.elastic.co/t/logstash-how-to-replace-field-values-in-json-based-on-id/200850>\
**Category:** Logstash\
**Created:** [September 24, 2019, 11:17am UTC](https://discuss.elastic.co/t/logstash-how-to-replace-field-values-in-json-based-on-id/200850 "2019-09-24T11:17:19Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Igor\_Belyakov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/igor_belyakov/32/52615_2.png) [@Igor\_Belyakov](https://discuss.elastic.co/u/Igor_Belyakov)\
**Post date:** [September 24, 2019, 11:17am UTC](https://discuss.elastic.co/t/logstash-how-to-replace-field-values-in-json-based-on-id/200850/1 "2019-09-24T11:17:19Z")

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Hello  
How to replace **all** occurrences of ID in such JSON:  
"\_source": {  
"rules": [  
{  
"ruleID": "001"  
"action": "count"  
}  
{  
"ruleID": "003"  
"action": "count"  
}  
]  
}

Provided that all identifiers are **known** :  
001 - Rule\_name\_1  
002 - Rule\_name\_2  
003 - Rule\_name\_3

The **result** should be like this:  
"\_source": {  
"rules": [  
{  
"ruleID": "Rule\_name\_1"  
"action": "count"  
}  
{  
"ruleID": "Rule\_name\_3"  
"action": "count"  
}  
]  
}

---

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [September 24, 2019, 2:12pm UTC](https://discuss.elastic.co/t/logstash-how-to-replace-field-values-in-json-based-on-id/200850/2 "2019-09-24T14:12:01Z")

</div>

Use the iterate\_on option on a translate filter

```
translate {
    dictionary => { "001" => "Rule_name_1" "002" => "Rule_name_2" "003" => "Rule_name_3" }
    iterate_on => "rules"
    field => "ruleID"
}
```

---

<div class="post-metadata">

**Author:** ![Igor\_Belyakov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/igor_belyakov/32/52615_2.png) [@Igor\_Belyakov](https://discuss.elastic.co/u/Igor_Belyakov)\
**Post date:** [September 24, 2019, 3:05pm UTC](https://discuss.elastic.co/t/logstash-how-to-replace-field-values-in-json-based-on-id/200850/3 "2019-09-24T15:05:32Z")

</div>

Thank you!

---

<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 22, 2019, 3:05pm UTC](https://discuss.elastic.co/t/logstash-how-to-replace-field-values-in-json-based-on-id/200850/4 "2019-10-22T15:05:32Z")

</div>

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