lfnovo/open-notebook · warning · HTTPException

Final answer model not found

Error message

Final answer model {ask_request.final_answer_model} not found

What it means

400 from /api/search/ask when the final answer model ID does not exist in the database. This model produces the final polished answer of the ask pipeline.

Solutions

Validate all three model IDs against GET /api/models before asking
Re-select models in the UI so fresh IDs are sent

Defensive patterns

Strategy: validation

Validate before calling

const valid = models.some(m => m.id === req.final_answer_model);
if (!valid) req.final_answer_model = getDefault('final_answer');

Type guard

const isKnownModelId = (id: string, models: Model[]) => models.some(m => m.id === id);

Try / catch

catch (e) { if (e.status === 400 && e.detail.includes('Final answer model')) refreshModelSelection(); }

Prevention

Validate every model ID; clean up references when deleting models

When it happens

Trigger: POST /api/search/ask with a final_answer_model ID that has no corresponding models row.

Common situations: Deleted or renamed models, stale persisted request payloads from the UI.

Related errors

AI-assisted analysis of lfnovo/open-notebook@a7de90d38a (2026-08-27). Data as JSON: /api/errors/9b697f7d3abf0d39. Report an issue: GitHub.

Appendix: source

Thrown at api/routers/search.py:143

    """Ask the knowledge base a question using AI models."""
    try:
        # Validate models exist
        strategy_model = await Model.get(ask_request.strategy_model)
        answer_model = await Model.get(ask_request.answer_model)
        final_answer_model = await Model.get(ask_request.final_answer_model)

        if not strategy_model:
            raise HTTPException(
                status_code=400,
                detail=f"Strategy model {ask_request.strategy_model} not found",
            )
        if not answer_model:
            raise HTTPException(
                status_code=400,
                detail=f"Answer model {ask_request.answer_model} not found",
            )
        if not final_answer_model:
            raise HTTPException(
                status_code=400,
                detail=f"Final answer model {ask_request.final_answer_model} not found",
            )

        # Check if embedding model is available
        if not await model_manager.get_embedding_model():
            raise HTTPException(
                status_code=400,
                detail="Ask feature requires an embedding model. Please configure one in the Models section.",
            )

        # For streaming response
        return StreamingResponse(
            stream_ask_response(
                ask_request.question, strategy_model, answer_model, final_answer_model
            ),
            media_type="text/event-stream",
            headers={

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