## Batch create new Workflow instances

`client.Workflows.Instances.Bulk(ctx, workflowName, params) (*SinglePage[InstanceBulkResponse], error)`

**post** `/accounts/{account_id}/workflows/{workflow_name}/instances/batch`

Creates multiple workflow instances in a single batch operation.

### Parameters

- `workflowName string`

- `params InstanceBulkParams`

  - `AccountID param.Field[string]`

    Path param

  - `Body param.Field[[]InstanceBulkParamsBody]`

    Body param

    - `InstanceID string`

    - `InstanceRetention InstanceBulkParamsBodyInstanceRetention`

      - `ErrorRetention InstanceBulkParamsBodyInstanceRetentionErrorRetentionUnion`

        Specifies the duration in milliseconds or as a string like '5 minutes'.

        - `UnionInt`

        - `UnionString`

      - `SuccessRetention InstanceBulkParamsBodyInstanceRetentionSuccessRetentionUnion`

        Specifies the duration in milliseconds or as a string like '5 minutes'.

        - `UnionInt`

        - `UnionString`

    - `Params unknown`

### Returns

- `type InstanceBulkResponse struct{…}`

  - `ID string`

  - `Status InstanceBulkResponseStatus`

    - `const InstanceBulkResponseStatusQueued InstanceBulkResponseStatus = "queued"`

    - `const InstanceBulkResponseStatusRunning InstanceBulkResponseStatus = "running"`

    - `const InstanceBulkResponseStatusPaused InstanceBulkResponseStatus = "paused"`

    - `const InstanceBulkResponseStatusErrored InstanceBulkResponseStatus = "errored"`

    - `const InstanceBulkResponseStatusTerminated InstanceBulkResponseStatus = "terminated"`

    - `const InstanceBulkResponseStatusComplete InstanceBulkResponseStatus = "complete"`

    - `const InstanceBulkResponseStatusWaitingForPause InstanceBulkResponseStatus = "waitingForPause"`

    - `const InstanceBulkResponseStatusWaiting InstanceBulkResponseStatus = "waiting"`

  - `VersionID string`

  - `WorkflowID string`

### Example

```go
package main

import (
  "context"
  "fmt"

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

func main() {
  client := cloudflare.NewClient(
    option.WithAPIToken("Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY"),
  )
  page, err := client.Workflows.Instances.Bulk(
    context.TODO(),
    "x",
    workflows.InstanceBulkParams{
      AccountID: cloudflare.F("account_id"),
    },
  )
  if err != nil {
    panic(err.Error())
  }
  fmt.Printf("%+v\n", page)
}
```

#### Response

```json
{
  "errors": [
    {
      "code": 0,
      "message": "message"
    }
  ],
  "messages": [
    {
      "code": 0,
      "message": "message"
    }
  ],
  "result": [
    {
      "id": "x",
      "status": "queued",
      "version_id": "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
      "workflow_id": "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e"
    }
  ],
  "success": true,
  "result_info": {
    "count": 0,
    "per_page": 0,
    "total_count": 0,
    "cursor": "cursor",
    "page": 0
  }
}
```