# Working with fields containing underline in painless scripts
**URL:** https://discuss.elastic.co/t/working-with-fields-containing-underline-in-painless-scripts/118646
**Category:** Elasticsearch
**Created:** [February 6, 2018, 12:48pm UTC](https://discuss.elastic.co/t/working-with-fields-containing-underline-in-painless-scripts/118646 "2018-02-06T12:48:58Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@mh20](https://discuss.elastic.co/u/mh20)
#### Post date: [February 6, 2018, 12:48pm UTC](https://discuss.elastic.co/t/working-with-fields-containing-underline-in-painless-scripts/118646/1 "2018-02-06T12:48:58Z")
Hi, I am writing a painless script for removing values from arrays as described in [https://discuss.elastic.co/t/removing-elements-from-an-array-in-a-document/10156](https://discuss.elastic.co/t/removing-elements-from-an-array-in-a-document/10156) and [https://stackoverflow.com/questions/45980054/how-to-remove-arraylist-value-in-elastic-search-using-curl](https://stackoverflow.com/questions/45980054/how-to-remove-arraylist-value-in-elastic-search-using-curl) but my field names contain underline which cause error. For example first script work fine:
{
"script": {
"lang": "painless",
"inline": "ctx.\_source.my\_field.removeAll(Collections.singleton('valueToRemove'))"
}
}
But second script:
{
"script":
{
"inline": "ctx.\_source.11\_my\_field.removeAll(Collections.singleton('valueToRemove'))"
},
"query":
{
"match\_all": {}
}
}
caused this error:
{
"error": {
"root\_cause": [
{
"type": "script\_exception",
"reason": "compile error",
"script\_stack": [
"ctx.\_source.11\_my\_field.removeAll(Colle ...",
" ^---- HERE"
],
"script": "ctx.\_source.11\_my\_field.removeAll(Collections.singleton('new\_name2'))",
"lang": "painless"
}
],
"type": "script\_exception",
"reason": "compile error",
"script\_stack": [
"ctx.\_source.11\_my\_field.removeAll(Colle ...",
" ^---- HERE"
],
"script": "ctx.\_source.11\_my\_field.removeAll(Collections.singleton('new\_name2'))",
"lang": "painless",
"caused\_by": {
"type": "illegal\_argument\_exception",
"reason": "unexpected token ['\_my\_field'] was expecting one of [{, ';'}]."
}
},
"status": 500
}
What should I do? How can I write this script for fields that start with number and contain underline?
---
### Author:  [@val](https://discuss.elastic.co/u/val)
#### Post date: [February 6, 2018, 12:51pm UTC](https://discuss.elastic.co/t/working-with-fields-containing-underline-in-painless-scripts/118646/2 "2018-02-06T12:51:00Z")
Can you try this way?
```
ctx._source['11_my_field'].removeAll(Collections.singleton('new_name2'))
```
---
### Author:  [@mh20](https://discuss.elastic.co/u/mh20)
#### Post date: [February 6, 2018, 12:56pm UTC](https://discuss.elastic.co/t/working-with-fields-containing-underline-in-painless-scripts/118646/3 "2018-02-06T12:56:05Z")
Thanks, It worked!
---
### Author:  [@val](https://discuss.elastic.co/u/val)
#### Post date: [February 6, 2018, 12:57pm UTC](https://discuss.elastic.co/t/working-with-fields-containing-underline-in-painless-scripts/118646/4 "2018-02-06T12:57:51Z")
Awesome, glad we figured it out!
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [March 6, 2018, 12:58pm UTC](https://discuss.elastic.co/t/working-with-fields-containing-underline-in-painless-scripts/118646/5 "2018-03-06T12:58:25Z")
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