# Logstash custom filter is not taking the field, and takes the filed name as the string instead
**URL:** https://discuss.elastic.co/t/logstash-custom-filter-is-not-taking-the-field-and-takes-the-filed-name-as-the-string-instead/34779
**Category:** Logstash
**Created:** [November 17, 2015, 10:09am UTC](https://discuss.elastic.co/t/logstash-custom-filter-is-not-taking-the-field-and-takes-the-filed-name-as-the-string-instead/34779 "2015-11-17T10:09:24Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Isra](https://discuss.elastic.co/u/Isra)
#### Post date: [November 17, 2015, 10:09am UTC](https://discuss.elastic.co/t/logstash-custom-filter-is-not-taking-the-field-and-takes-the-filed-name-as-the-string-instead/34779/1 "2015-11-17T10:09:24Z")
The following is my filter .rb file
```
# encoding: utf-8
require "logstash/filters/base"
require "logstash/namespace"
require 'java'
require 'myProject.jar'
$CLASSPATH << 'lib'
class LogStash::Filters::Analyze < LogStash::Filters::Base
config_name "analyze"
config :text, :validate => :string
public
def register
@result = JavaUtilities.get_proxy_class('MyClass.myMethod')
@result_ = @result.new()
@final_result = @result _.myMethod(@text)
end
public
def filter(event)
event["text_being_proccessed"] = @text
filter_matched(event)
end
end
```
And the following is my configuration filter:
```
analyze {
text => {%{text}} #note that the field I wanna analyze is also called text
}
```
However, the result is `text` and not the value of text. WHy is that??? HELP PLEASE
Thanks.
---
### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [November 17, 2015, 6:43pm UTC](https://discuss.elastic.co/t/logstash-custom-filter-is-not-taking-the-field-and-takes-the-filed-name-as-the-string-instead/34779/2 "2015-11-17T18:43:41Z")
> ```
> text => {%{text}}
>
> ```
Do you actually mean
```
text => "%{text}"
```
? In that case you need to access the contents of the `text` field with `event.sprintf(@text)`.
---
### Author:  [@Isra](https://discuss.elastic.co/u/Isra)
#### Post date: [November 18, 2015, 8:03am UTC](https://discuss.elastic.co/t/logstash-custom-filter-is-not-taking-the-field-and-takes-the-filed-name-as-the-string-instead/34779/4 "2015-11-18T08:03:51Z")
Okay, I see. Using `(event)` wouldn't work inside the `register` method tho, right? only within the `filter` method?
---
### Author:  [@Isra](https://discuss.elastic.co/u/Isra)
#### Post date: [November 18, 2015, 8:11am UTC](https://discuss.elastic.co/t/logstash-custom-filter-is-not-taking-the-field-and-takes-the-filed-name-as-the-string-instead/34779/5 "2015-11-18T08:11:36Z")
Oh everything is working for me now, thank you so much 🙂
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 5:22am UTC](https://discuss.elastic.co/t/logstash-custom-filter-is-not-taking-the-field-and-takes-the-filed-name-as-the-string-instead/34779/6 "2017-07-06T05:22:23Z")