BoundaryML/baml · error

failed to get method: %w

Error message

failed to get method: %w

What it means

httpRequest.Method() invokes the runtime object's 'method' via the raw-objects bridge. 'failed to get method: %w' indicates the bridge call itself failed, so the HTTP method could not be read from the underlying object.

Source

Thrown at engine/language_client_go/pkg/rawobjects_http_request.go:58

func (h *httpRequest) Url() (string, error) {
	result, err := raw_objects.CallMethod(h, "url", nil)
	if err != nil {
		return "", fmt.Errorf("failed to get URL: %w", err)
	}

	url, ok := result.(string)
	if !ok {
		return "", fmt.Errorf("unexpected type for URL: %T", result)
	}

	return url, nil
}

func (h *httpRequest) Method() (string, error) {
	result, err := raw_objects.CallMethod(h, "method", nil)
	if err != nil {
		return "", fmt.Errorf("failed to get method: %w", err)
	}

	method, ok := result.(string)
	if !ok {
		return "", fmt.Errorf("unexpected type for method: %T", result)
	}

	return method, nil
}

func (h *httpRequest) Headers() (map[string]string, error) {
	result, err := raw_objects.CallMethod(h, "headers", nil)
	if err != nil {
		return nil, fmt.Errorf("failed to get headers: %w", err)
	}

	headers, ok := result.(map[string]string)
	if !ok {

View on GitHub (pinned to bd85ce9dee)

Solutions

1. Inspect the wrapped cause (%w)
2. Use the request only during its dispatch lifecycle
3. Confirm the runtime object defines 'method'
4. Re-dispatch to obtain a fresh request

if req == nil { return errors.New("request unavailable") }

func (h *httpRequest) hasMethod() bool { return h != nil && h.RawObject != nil }

m, err := req.Method()
if err != nil {
    return fmt.Errorf("cannot read HTTP method: %w", err)
}

When it happens

Trigger: Calling Method() on an invalid/detached request object, or when the runtime 'method' implementation raises an exception.

Common situations: Accessing request data after script teardown; runtime handlers panicking on method lookup; mismatched client/runtime versions.

Related errors

• failed to get JSON: %w
• failed to get ID: %w
• failed to get URL: %w
• unexpected type for method: %T
• failed to get headers: %w

AI-assisted analysis of BoundaryML/baml@bd85ce9dee (2026-09-12). Data as JSON: /api/errors/e74c0bf7e8f51a40. Report an issue: GitHub.