multica-ai/multica · error

upload response missing attachment id

Error message

upload response missing attachment id

What it means

Error "upload response missing attachment id" thrown in multica-ai/multica.

Source

Thrown at server/internal/cli/client.go:483

	resp, err := c.HTTPClient.Do(req)
	err = wrapTransport(req, err)
	if err != nil {
		return "", err
	}
	defer resp.Body.Close()

	if resp.StatusCode >= 400 {
		return "", newHTTPError(http.MethodPost, "/api/upload-file", resp)
	}

	var result map[string]any
	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
		return "", fmt.Errorf("decode upload response: %w", err)
	}

	id, _ := result["id"].(string)
	if id == "" {
		return "", fmt.Errorf("upload response missing attachment id")
	}
	return id, nil
}

// UploadChatAttachment uploads a file via multipart form to /api/upload-file
// tagged with a chat task (task_id). The server binds the row to the assistant
// reply that task produces on completion. Returns the full AttachmentResponse
// (id + markdown_url) so the agent can embed the image inline in its reply.
func (c *APIClient) UploadChatAttachment(ctx context.Context, fileData []byte, filename, taskID string) (AttachmentResponse, error) {
	var body bytes.Buffer
	writer := multipart.NewWriter(&body)

	part, err := writer.CreateFormFile("file", filepath.Base(filename))
	if err != nil {
		return AttachmentResponse{}, fmt.Errorf("create form file: %w", err)
	}
	if _, err := part.Write(fileData); err != nil {
		return AttachmentResponse{}, fmt.Errorf("write file data: %w", err)

View on GitHub (pinned to 2c0912b6ec)

Solutions

1. Retry the upload; if it persists, report the missing attachment id as a server bug.

When it happens

Trigger: Thrown at server/internal/cli/client.go:483 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of multica-ai/multica@2c0912b6ec (2026-08-15). Data as JSON: /api/errors/58cf727b5b944563. Report an issue: GitHub.