## Upsert Vectors

`client.Vectorize.Indexes.Upsert(ctx, indexName, params) (*IndexUpsertResponse, error)`

**post** `/accounts/{account_id}/vectorize/v2/indexes/{index_name}/upsert`

Upserts vectors into the specified index, creating them if they do not exist and returns a mutation id corresponding to the vectors enqueued for upsertion.

### Parameters

- `indexName string`

- `params IndexUpsertParams`

  - `AccountID param.Field[string]`

    Path param: Identifier

  - `Body param.Field[Reader]`

    Body param: ndjson file containing vectors to upsert.

  - `UnparsableBehavior param.Field[IndexUpsertParamsUnparsableBehavior]`

    Query param: Behavior for ndjson parse failures.

    - `const IndexUpsertParamsUnparsableBehaviorError IndexUpsertParamsUnparsableBehavior = "error"`

    - `const IndexUpsertParamsUnparsableBehaviorDiscard IndexUpsertParamsUnparsableBehavior = "discard"`

### Returns

- `type IndexUpsertResponse struct{…}`

  - `MutationID string`

    The unique identifier for the async mutation operation containing the changeset.

### Example

```go
package main

import (
  "bytes"
  "context"
  "fmt"
  "io"

  "github.com/cloudflare/cloudflare-go"
  "github.com/cloudflare/cloudflare-go/option"
  "github.com/cloudflare/cloudflare-go/vectorize"
)

func main() {
  client := cloudflare.NewClient(
    option.WithAPIToken("Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY"),
  )
  response, err := client.Vectorize.Indexes.Upsert(
    context.TODO(),
    "example-index",
    vectorize.IndexUpsertParams{
      AccountID: cloudflare.F("023e105f4ecef8ad9ca31a8372d0c353"),
      Body: io.Reader(bytes.NewBuffer([]byte("Example data"))),
    },
  )
  if err != nil {
    panic(err.Error())
  }
  fmt.Printf("%+v\n", response.MutationID)
}
```

#### Response

```json
{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "result": {
    "mutationId": "0000aaaa-11bb-22cc-33dd-444444eeeeee"
  },
  "success": true
}
```