# NEST 7.17. Bulk-Update Partial Document changes JObject $type
**URL:** https://discuss.elastic.co/t/nest-7-17-bulk-update-partial-document-changes-jobject-type/300164
**Category:** Elasticsearch
**Tags:** language-clients
**Created:** [March 21, 2022, 7:25am UTC](https://discuss.elastic.co/t/nest-7-17-bulk-update-partial-document-changes-jobject-type/300164 "2022-03-21T07:25:09Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@neox2811](https://discuss.elastic.co/u/neox2811)
#### Post date: [March 21, 2022, 7:25am UTC](https://discuss.elastic.co/t/nest-7-17-bulk-update-partial-document-changes-jobject-type/300164/1 "2022-03-21T07:25:10Z")
Hi,
I want to update existing objects with the Code provided in this topic: [Bulk Partial Update using Nest - #2 by Erkan\_Aslanel](https://discuss.elastic.co/t/bulk-partial-update-using-nest/29124/2)
But atfer the update the $type of my entity has changes to the type of the partial update property. Is that expected behavior?
Before Update:
```auto
Query: GET my-index/_doc/1
"$type" : "VendorProductSearchModel",
```
After Update:
```auto
Query: GET my-index/_doc/1
"$type" : "PartialVendorProductStoreListUpdate",
```
Now, when I try to read the document I cannot deserialize it into my Model (VendorProductSearchModel), because the type was changes to PartialVendorProductStoreListUpdate.
What is the point of the two type-arguments in the update method? Is there anything I'm missing?
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [April 18, 2022, 7:25am UTC](https://discuss.elastic.co/t/nest-7-17-bulk-update-partial-document-changes-jobject-type/300164/2 "2022-04-18T07:25:13Z")
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