# Update a runtime field

**POST /api/data_views/data_view/{viewId}/runtime_field/{fieldName}**

**Spaces method and path for this operation:**

<div><span class="operation-verb post">post</span>&nbsp;<span class="operation-path">/s/{space_id}/api/data_views/data_view/{viewId}/runtime_field/{fieldName}</span></div>

Refer to [Spaces](http://www.elastic.co/docs/deploy-manage/manage-spaces) for more information.


## Servers
- http://localhost:5601: http://localhost:5601 ()


## Authentication methods
- Api key auth
- Basic auth


## Parameters

### Path parameters
- **fieldName** (string)
  The name of the runtime field.
- **viewId** (string)
  An identifier for the data view.


### Body: application/json (object)

- **runtimeField** (object)
  The runtime field definition object.

  You can update following fields:

  - `type`
  - `script`


## Responses
### 200
Indicates a successful call.

### 400
Bad request

#### Body: application/json (object)
- **error** (string)

- **message** (string)

- **statusCode** (number)



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