siyuan-note/siyuan · error

AI editor input is empty

Error message

AI editor input is empty

What it means

After optionally filling input from the given block IDs, the library builds the editor prompt and validates it. If the resulting prompt is entirely whitespace, there is nothing for the AI editor to act on, so the request is refused before contacting the model.

Source

Thrown at kernel/model/ai.go:174

	if !Conf.AI.HasAnyProvider() {
		return nil, errors.New("no AI provider configured")
	}

	prov, m := Conf.AI.GetEditingModel()
	if nil == prov || nil == m {
		return nil, errors.New("no AI editing model configured")
	}
	editing := Conf.AI.Editing
	if nil == editing {
		return nil, errors.New("no AI editing config")
	}

	if "" == input && 0 < len(ids) {
		input = getBlocksContent(ids)
	}
	prompt := BuildAIEditorPrompt(input, action)
	if "" == strings.TrimSpace(prompt) {
		return nil, errors.New("AI editor input is empty")
	}

	messages := buildAIEditorMessages(prompt, history, editing.MaxHistoryMessages)

	req := openai.ChatCompletionRequest{
		Model:               m.Name,
		MaxCompletionTokens: editing.MaxCompletionTokens,
		Temperature:         float32(editing.Temperature),
		Messages:            messages,
		Stream:              true,
	}
	streamCtx, cancel := context.WithCancel(ctx)
	streamCtx = util.ContextWithOpenAIResponsesBaseURL(streamCtx, prov.BaseURL)
	requestTimeout := time.Duration(prov.RequestTimeout) * time.Second
	requestTimer, requestTimerDone := startAIEditorCancelTimer(requestTimeout, cancel)
	client := util.NewOpenAIClientWithModel(prov.APIKey, prov.BaseURL, m.Name)
	completionStream, err := util.CreateOpenAICompletionStream(streamCtx, client, prov.Protocol, req, nil)
	requestTimedOut := stopAIEditorCancelTimer(requestTimer, requestTimerDone)

View on GitHub (pinned to 8641553a1f)

Solutions

1. Pass non-empty input text or valid block IDs whose content exists
2. Check that the block IDs passed still exist (getBlocksContent returns content only for live blocks)
3. Verify the selected action's prompt template yields non-empty text for the given input

Example fix

// before
stream, err := NewAIEditorChatStream("", action, history, nil)
// after
if strings.TrimSpace(input) == "" {
    return errors.New("provide text or valid block IDs")
}
stream, err := NewAIEditorChatStream(input, action, history, ids)

if (!input.trim() && !(ids && ids.length)) { throw new Error('Provide input text or block IDs') }

try { await startAIEditor() } catch (e) { if (e.message === 'AI editor input is empty') showToast('Select a block or enter text first') }

When it happens

Trigger: Calling NewAIEditorChatStream with an empty input string and either no ids, ids resolving to empty content, or an action that produces no prompt text; BuildAIEditorPrompt output trims to "".

Common situations: Invoking AI editing on an empty document/block; passing whitespace-only input; action prompt that interpolates only empty user content; getBlocksContent returning nothing for stale/deleted block IDs.

Understand the failure class

Background: "must not be empty", "cannot be empty" — required-field validation errors across open-source libraries — this error's family across 41 libraries.

Related errors

• provider base URL is required
• custom emoji file must not be empty
• no valid IDs provided
• empty HEIF image
• empty HEIF image

AI-assisted analysis of siyuan-note/siyuan@8641553a1f (2026-09-11). Data as JSON: /api/errors/c71b96d294bb081e. Report an issue: GitHub.