# Field mappings

Get and update field transformation mappings (hashing, renaming, filtering) for a connection.

## Get mappings

Returns the field transformation mappings configured for a connection.

#### Path Parameters

**`connection_id`** string required

The connection ID.

## Update mappings

Set hashing, renaming, or filtering rules per stream.

#### Request Body

**`mappings`** array required

Array of mapping rules. Mapper types include `hashing`, `field_renaming`, and `row_filtering`.

## Returns

A mappings object containing a `mappings` array with transformation rules.

Request

```bash cURL
curl "https://api.aitronos.com/v1/organizations/org_xyz789/knowledge/connectors/connections/conn_abc123/mappings" \
  -H "Authorization: Bearer $ACCESS_TOKEN"
```


```python Python SDK
from aitronos import Aitronos

client = Aitronos(api_key="your-api-key")

mappings = client.knowledge_connectors.get_mappings(
    organization_id="org_xyz789",
    connection_id="conn_abc123",
)
print(mappings)
```


```python Python
import requests

org_id = "org_xyz789"
conn_id = "conn_abc123"
url = f"https://api.aitronos.com/v1/organizations/{org_id}/knowledge/connectors/connections/{conn_id}/mappings"
headers = {"Authorization": "Bearer YOUR_ACCESS_TOKEN"}

response = requests.get(url, headers=headers)
print(response.json())
```


```javascript JavaScript
const response = await fetch(
  "https://api.aitronos.com/v1/organizations/org_xyz789/knowledge/connectors/connections/conn_abc123/mappings",
  {
    headers: { Authorization: "Bearer YOUR_ACCESS_TOKEN" },
  }
);
const data = await response.json();
console.log(data);
```

Response

```json 200 OK
{
  "mappings": [
    {
      "type": "hashing",
      "stream_name": "users",
      "field": "email",
      "algorithm": "sha256"
    },
    {
      "type": "field_renaming",
      "stream_name": "orders",
      "source_field": "orderDate",
      "target_field": "order_date"
    }
  ]
}
```


```json 4xx Error
{
  "success": false,
  "error": {
    "code": "CONNECTOR_CONNECTION_NOT_FOUND",
    "message": "The requested connection was not found.",
    "type": "client_error",
    "status": 404,
    "details": {},
    "trace_id": "abc-123-def",
    "timestamp": "2025-12-22T15:30:00Z"
  }
}
```

## Related Resources

- [Manage Connections](/docs/api-reference/knowledge-connectors/connections)
- [Stream Configuration](/docs/api-reference/knowledge-connectors/stream-config)