# Mutating several fields at once
**URL:** https://discuss.elastic.co/t/mutating-several-fields-at-once/175402
**Category:** Logstash
**Created:** [April 4, 2019, 12:12pm UTC](https://discuss.elastic.co/t/mutating-several-fields-at-once/175402 "2019-04-04T12:12:34Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@saif3r](https://discuss.elastic.co/u/saif3r)
#### Post date: [April 4, 2019, 12:12pm UTC](https://discuss.elastic.co/t/mutating-several-fields-at-once/175402/1 "2019-04-04T12:12:35Z")
Hi Guys,
I'm looking for a more efficient way to convert my fields. My output looks like this:
```
"id" => 1.0
"code" => 200.0
"name" => "Something "
"middlename" => " Hok"
"lastname" => "Something as well"
```
I need to convert my numeric values to integers and strip all whitespaces from string fields.
Normally I would use simple operations:
> mutate {
> convert =\> {
> "id" =\> "integer"
> "code" =\> "integer"
> }
> strip =\> ["name", "middlename", "lastname"]
> }
And that's ok for a few fields. But let's assume i have around 100 of each type and doing the same for all of them might be problematic. Is there a more efficient way to do it? Ruby, conditional statement? If so, what would be the code to achieve it?
Thanks in advance!
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 2, 2019, 12:12pm UTC](https://discuss.elastic.co/t/mutating-several-fields-at-once/175402/2 "2019-05-02T12:12:37Z")
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