# Nest Inferred mappings output
**URL:** https://discuss.elastic.co/t/nest-inferred-mappings-output/73783
**Category:** Elasticsearch
**Created:** [February 3, 2017, 3:36am UTC](https://discuss.elastic.co/t/nest-inferred-mappings-output/73783 "2017-02-03T03:36:16Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@shakdoesspark](https://discuss.elastic.co/u/shakdoesspark)
#### Post date: [February 3, 2017, 3:36am UTC](https://discuss.elastic.co/t/nest-inferred-mappings-output/73783/1 "2017-02-03T03:36:16Z")
Hi,
I'm using the Nest library and trying to get what the inferred mapping is in JSON.
---
### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [February 3, 2017, 4:19am UTC](https://discuss.elastic.co/t/nest-inferred-mappings-output/73783/2 "2017-02-03T04:19:24Z")
And are you looking for assistance with this?
---
### Author:  [@forloop](https://discuss.elastic.co/u/forloop)
#### Post date: [February 3, 2017, 4:27am UTC](https://discuss.elastic.co/t/nest-inferred-mappings-output/73783/3 "2017-02-03T04:27:03Z")
You can capture the request and response using `OnRequestCompleted()` in conjunction with `.DisableDirectStreaming()`
```auto
void Main()
{
var pool = new SingleNodeConnectionPool(new Uri("http://localhost:9200"));
var defaultIndex = "default-index";
var connectionSettings = new ConnectionSettings(pool)
.DefaultIndex(defaultIndex)
.PrettyJson()
.DisableDirectStreaming()
.OnRequestCompleted(response =>
{
// log out the request
if (response.RequestBodyInBytes != null)
{
Console.WriteLine(
$"{response.HttpMethod} {response.Uri} \n" +
$"{Encoding.UTF8.GetString(response.RequestBodyInBytes)}");
}
else
{
Console.WriteLine($"{response.HttpMethod} {response.Uri}");
}
Console.WriteLine();
// log out the response
if (response.ResponseBodyInBytes != null)
{
Console.WriteLine($"Status: {response.HttpStatusCode}\n" +
$"{Encoding.UTF8.GetString(response.ResponseBodyInBytes)}\n" +
$"{new string('-', 30)}\n");
}
else
{
Console.WriteLine($"Status: {response.HttpStatusCode}\n" +
$"{new string('-', 30)}\n");
}
});
var client = new ElasticClient(connectionSettings);
if (client.IndexExists(defaultIndex).Exists)
client.DeleteIndex(defaultIndex);
client.CreateIndex(defaultIndex, c => c
.Mappings(m => m
.Map(mm => mm
.AutoMap()
)
)
);
}
public class Document
{
public string Field1 { get; set;}
}
```
this yields
```json
PUT http://localhost:9200/default-index?pretty=true
{
"mappings": {
"document": {
"properties": {
"field1": {
"type": "string"
}
}
}
}
}
```
You can also use a web debugging proxy such as [Fiddler](http://www.telerik.com/fiddler) to capture traffic.
---
### Author:  [@shakdoesspark](https://discuss.elastic.co/u/shakdoesspark)
#### Post date: [February 3, 2017, 4:52pm UTC](https://discuss.elastic.co/t/nest-inferred-mappings-output/73783/4 "2017-02-03T16:52:14Z")
Hi Russ,
Thanks for the help on that!
Is there any way else besides making a request out to the cluster to get that json mapping?
---
### Author:  [@forloop](https://discuss.elastic.co/u/forloop)
#### Post date: [February 6, 2017, 1:48am UTC](https://discuss.elastic.co/t/nest-inferred-mappings-output/73783/5 "2017-02-06T01:48:29Z")
> [@shakdoesspark](#):
>
> Is there any way else besides making a request out to the cluster to get that json mapping?
1. Use an `InMemoryConnection` on `ConnectionSettings`
2. pass the `CreateIndexDescriptor` or `CreateIndexRequest` to `client.Serializer`
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [March 6, 2017, 1:48am UTC](https://discuss.elastic.co/t/nest-inferred-mappings-output/73783/6 "2017-03-06T01:48:49Z")
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