# Update partial fields leads to other fields missing that are excluded in the \_source
**URL:** https://discuss.elastic.co/t/update-partial-fields-leads-to-other-fields-missing-that-are-excluded-in-the-source/257790
**Category:** Elasticsearch
**Created:** [December 7, 2020, 1:38am UTC](https://discuss.elastic.co/t/update-partial-fields-leads-to-other-fields-missing-that-are-excluded-in-the-source/257790 "2020-12-07T01:38:36Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@chemboking](https://discuss.elastic.co/u/chemboking)
#### Post date: [December 7, 2020, 1:38am UTC](https://discuss.elastic.co/t/update-partial-fields-leads-to-other-fields-missing-that-are-excluded-in-the-source/257790/1 "2020-12-07T01:38:36Z")
For example, i have a mapping as followed:
```auto
{
"mappings": {
"_source": {
"includes": [
"gender"
]
},
"properties": {
"name": {
"type": "keyword"
},
"gender": {
"type": "keyword"
}
}
}
}
```
After i put a document into the index, if i update this document with
```auto
POST myindex/_doc/1/_update
{
"doc":{
"gender":"male"
}
}
```
i will lose the name field forever. Because the name field is not included in the \_source.
I understand that every update operation is a brand new reindex, es will take the whole \_source out of the document and execute the index operation again even just update one or two fields out of 100. Under this circumstance, i have to gather all the fields that are excluded in the \_source to make an update-one-field operation.
The reason why i exclude these fields is that i want to make the index as small as possible. We fetch the fields through docvalue\_fields and disable the whole \_source, in this case, our index is fast and small.
So what's your suggestion if we want to do the update partial fields and leave the whole source disabled?
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [December 7, 2020, 3:10am UTC](https://discuss.elastic.co/t/update-partial-fields-leads-to-other-fields-missing-that-are-excluded-in-the-source/257790/2 "2020-12-07T03:10:55Z")
> [@chemboking](#):
>
> So what's your suggestion if we want to do the update partial fields and leave the whole source disabled?
I don't think it's possible. And IMHO you should always keep the `_source` intact.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [January 4, 2021, 3:11am UTC](https://discuss.elastic.co/t/update-partial-fields-leads-to-other-fields-missing-that-are-excluded-in-the-source/257790/3 "2021-01-04T03:11:26Z")
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