# Removing a filed in a json using mutate filter in logstash

**URL:** https://discuss.elastic.co/t/removing-a-filed-in-a-json-using-mutate-filter-in-logstash/195746
**Category:** Logstash
**Created:** [August 19, 2019, 1:02pm UTC](https://discuss.elastic.co/t/removing-a-filed-in-a-json-using-mutate-filter-in-logstash/195746 "2019-08-19T13:02:28Z")
**Posts on this page:** 6
**Page:** 1

<div class="post-metadata">

### Author: ![chimbu3306](https://avatars.discourse-cdn.com/v4/letter/c/c67d28/32.png) [@chimbu3306](https://discuss.elastic.co/u/chimbu3306)
#### Post date: [August 19, 2019, 1:02pm UTC](https://discuss.elastic.co/t/removing-a-filed-in-a-json-using-mutate-filter-in-logstash/195746/1 "2019-08-19T13:02:28Z")

</div>

I have a json where i need to remove a field using mutate or any other filter,

```
  {
      "clientUserAgent": null,
      "environment": "Logs_0z9uc0nzlh/qa",
      "timestamp": 1566220446505,
      "sequence": 3,
      "payload": {
        "message": "(39087291-c283-11e9-943a-b9a377a9da4d) Endpoint request body after transformations: {\"type\":\"TOKEN\",\"methodArn\":\"arn:aws:execute-api:eu-west-1:/PUT/v2/en\",\"authorizationToken\":\"eyJhbGciOiJIUzI1NiJ9\"}"
      },
      "@version": "1",
      "@timestamp": "2019-08-19T13:14:06.505Z"
    }

```

I have tried using the mutate filter to remove the filed authorizationToken and below is my filter, but it is not working as expected

filter {  
mutate { remove\_field =\> ["[payload][message][authorizationToken]"]  
}  
}

Can anyone give me an idea about how to get rid of the authorizationToken field in the json?

---

<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: [August 19, 2019, 1:28pm UTC](https://discuss.elastic.co/t/removing-a-filed-in-a-json-using-mutate-filter-in-logstash/195746/2 "2019-08-19T13:28:33Z")

</div>

[payload][message][authorizationToken] does not exist. [payload][message] is a string. Try

```
mutate { gsub => ["message", ',"authorizationToken":"[^"]+"', "" ] }
```

---

<div class="post-metadata">

### Author: ![chimbu3306](https://avatars.discourse-cdn.com/v4/letter/c/c67d28/32.png) [@chimbu3306](https://discuss.elastic.co/u/chimbu3306)
#### Post date: [August 19, 2019, 2:21pm UTC](https://discuss.elastic.co/t/removing-a-filed-in-a-json-using-mutate-filter-in-logstash/195746/3 "2019-08-19T14:21:21Z")

</div>

Thanks Badger, I tried this one but its not removing authorizationToken. Its returns the same input as output. The message part actually looks like this

```
   {
      "clientUserAgent": null,
      "environment": "Logs_0z9uc0nzlh/qa",
      "timestamp": 1566220446505,
      "sequence": 3,
      "payload": {
        "message": "(39087291-c283-11e9-943a-b9a377a9da4d) Endpoint request body after transformations: {\"type\":\"TOKEN\",\"methodArn\":\"arn:aws:execute-api:eu-west-1:/PUT/v2/en\",\"authorizationToken\":\"eyJhbGciOiJIUzI1NiJ9\"}"
      },
      "@version": "1",
      "@timestamp": "2019-08-19T13:14:06.505Z"
    }
```

---

<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: [August 19, 2019, 3:05pm UTC](https://discuss.elastic.co/t/removing-a-filed-in-a-json-using-mutate-filter-in-logstash/195746/4 "2019-08-19T15:05:05Z")

</div>

> [@Badger](#):
>
> mutate { gsub =\> ["message", ',"authorizationToken":"[^"]+"', "" ] }

Sorry, I meant

mutate { gsub =\> ["[payload][message]", ',"authorizationToken":"[^"]+"', "" ] }

---

<div class="post-metadata">

### Author: ![chimbu3306](https://avatars.discourse-cdn.com/v4/letter/c/c67d28/32.png) [@chimbu3306](https://discuss.elastic.co/u/chimbu3306)
#### Post date: [August 23, 2019, 2:56pm UTC](https://discuss.elastic.co/t/removing-a-filed-in-a-json-using-mutate-filter-in-logstash/195746/5 "2019-08-23T14:56:58Z")

</div>

Thanks Badger.its working as expected

---

<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 20, 2019, 2:57pm UTC](https://discuss.elastic.co/t/removing-a-filed-in-a-json-using-mutate-filter-in-logstash/195746/6 "2019-09-20T14:57:01Z")

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