` can be a collection of partial objects, you just need to be aware that index name and type name would be inferred from `T` in this case, unless explicitly provided.
I think you want something like the following
```auto
private static void Main()
{
var pool = new SingleNodeConnectionPool(new Uri("http://localhost:9200"));
var settings = new ConnectionSettings(pool);
var client = new ElasticClient(settings);
var partials = new object[]
{
new { id = 1, title = "foo" },
new { id = 2, body = "bar" },
new { id = 3, title = "baz" },
};
var bulkResponse = client.Bulk(b => b
.Index("index_name") // explicitly provide index name
.Type("doc_type") // explicitly provide doc type
.UpdateMany(partials, (bu, d) => bu.Doc(d))
);
}
```
This generates the following request
```json
POST http://localhost:9200/index_name/doc_type/_bulk
{"update":{"_id":"1"}}
{"doc":{"id":1,"title":"foo"}}
{"update":{"_id":"2"}}
{"doc":{"id":2,"body":"bar"}}
{"update":{"_id":"3"}}
{"doc":{"id":3,"title":"baz"}}
```
---
### Author:  [@mFriemann](https://discuss.elastic.co/u/mFriemann)
#### Post date: [June 3, 2019, 3:43pm UTC](https://discuss.elastic.co/t/please-explain-how-to-perform-a-bulk-update-with-partials-using-updatemany/183873/3 "2019-06-03T15:43:19Z")
> [@forloop](#):
>
> POST [http://localhost:9200/index\_name/doc\_type/\_bulk](http://localhost:9200/index_name/doc_type/_bulk) {"update":{"\_id":"1"}} {"doc":{"id":1,"title":"foo"}} {"update":{"\_id":"2"}} {"doc":{"id":2,"body":"bar"}} {"update":{"\_id":"3"}} {"doc":{"id":3,"title":"baz"}}
That mostly works for me. Is there a way to somehow specify a property in the anonymous object to be an id so that I don't have to use the property name "id"?
---
### Author:  [@forloop](https://discuss.elastic.co/u/forloop)
#### Post date: [June 4, 2019, 1:20am UTC](https://discuss.elastic.co/t/please-explain-how-to-perform-a-bulk-update-with-partials-using-updatemany/183873/4 "2019-06-04T01:20:41Z")
> [@mFriemann](#):
>
> Is there a way to somehow specify a property in the anonymous object to be an id so that I don't have to use the property name "id"?
Not for an anonymous type. The `id` property is picked up by NEST conventions, but if you wanted to have another property inferred to be the id of the document, you would need to create a POCO for it
```auto
[ElasticsearchType(IdProperty = nameof(MyId))]
public class PartialDoc
{
public int MyId { get; set; }
public string Title { get; set; }
public string Body { get; set; }
}
var partials = new PartialDoc[]
{
new PartialDoc{ MyId = 1, Title = "foo" },
new PartialDoc{ MyId = 2, Body = "bar" },
new PartialDoc{ MyId = 3, Title = "baz" },
};
var bulkResponse = client.Bulk(b => b
.Index("index_name") // explicitly provide index name
.Type("doc_type") // explicitly provide doc type
.UpdateMany(partials, (bu, d) => bu.Doc(d))
);
```
which would yield
```json
POST http://localhost:9200/index_name/doc_type/_bulk?pretty=true
{"update":{"_id":"1"}}
{"doc":{"myId":1,"title":"foo"}}
{"update":{"_id":"2"}}
{"doc":{"myId":2,"body":"bar"}}
{"update":{"_id":"3"}}
{"doc":{"myId":3,"title":"baz"}}
```
You can also [configure the property to use for the document ID on `ConnectionSettings`](https://www.elastic.co/guide/en/elasticsearch/client/net-api/current/ids-inference.html#_inferring_id_from_a_type).
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 2, 2019, 1:20am UTC](https://discuss.elastic.co/t/please-explain-how-to-perform-a-bulk-update-with-partials-using-updatemany/183873/5 "2019-07-02T01:20:44Z")
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