# Throw error when doc id already exists in index with NEST
**URL:** https://discuss.elastic.co/t/throw-error-when-doc-id-already-exists-in-index-with-nest/317283
**Category:** Elasticsearch
**Created:** [October 23, 2022, 6:31pm UTC](https://discuss.elastic.co/t/throw-error-when-doc-id-already-exists-in-index-with-nest/317283 "2022-10-23T18:31:16Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@johanwallenborg](https://discuss.elastic.co/u/johanwallenborg)
#### Post date: [October 23, 2022, 6:31pm UTC](https://discuss.elastic.co/t/throw-error-when-doc-id-already-exists-in-index-with-nest/317283/1 "2022-10-23T18:31:16Z")
Hello,
I'm using BulkAll-method when indexing documents. Everything works fine but I wonder if there's a way too report back if an document with same document id already exists in index.
Is there any?
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [October 23, 2022, 6:40pm UTC](https://discuss.elastic.co/t/throw-error-when-doc-id-already-exists-in-index-with-nest/317283/2 "2022-10-23T18:40:56Z")
Yes, if you use a create operation instead of an index the operation will fail if the document id is already present in the index.
---
### Author:  [@johanwallenborg](https://discuss.elastic.co/u/johanwallenborg)
#### Post date: [October 23, 2022, 7:29pm UTC](https://discuss.elastic.co/t/throw-error-when-doc-id-already-exists-in-index-with-nest/317283/3 "2022-10-23T19:29:37Z")
> [@Christian\_Dahlqvist](#):
>
> Yes, if you use a create operation instead of an index the operation will fail if the document id is already present in the index.
Now i got another behavior! Thank you (And extra +1 for answering at this late hour) ! 🙂
I tried following code to test this, if someone else is intrested:
```auto
internal class OrderExample
{
public string OrderId { get; set; }
public string Customer { get; set; }
public DateTimeOffset OrderDate { get; set; }
public OrderExample(string orderId, string customer)
{
OrderId = orderId;
Customer = customer;
}
}
```
```auto
var orders = new List();
orders.Add(new OrderExample("1", "Customer1"));
orders.Add(new OrderExample("1", "Customer1"));
orders.Add(new OrderExample("2", "Customer1"));
var bulkIndexResponse = client.Bulk(b => b
.CreateMany(orders, (descriptor, order) => descriptor
.Index($"test-order-data-{order.Customer.ToLower()}")
.Id($"{order.Customer.ToLower()}_{order.OrderId}")
));
if (bulkIndexResponse.Errors)
{
foreach (var item in bulkIndexResponse.ItemsWithErrors)
{
Console.WriteLine($"{item.Error.Reason}");
}
}
```
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 20, 2022, 7:30pm UTC](https://discuss.elastic.co/t/throw-error-when-doc-id-already-exists-in-index-with-nest/317283/4 "2022-11-20T19:30:01Z")
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