LCORE-464: fix potential None reference handling#418
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WalkthroughAdds defensive checks in retrieve_response to avoid accessing a missing response.output_message.content: returns (conversation_id, content) when present; otherwise logs a warning and returns (conversation_id, "") as a fallback. Function signature now includes a return type annotation and expanded pylint suppression. Changes
Sequence Diagram(s)sequenceDiagram
autonumber
actor Caller
participant retrieve_response
participant Logger
Caller->>retrieve_response: call with client, model_id, query_request, token, mcp_headers
alt response.output_message and content present
retrieve_response-->>Caller: (conversation_id, output_message.content)
else missing output_message or content
retrieve_response->>Logger: warn("output_message or content missing")
retrieve_response-->>Caller: (conversation_id, "")
end
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Actionable comments posted: 0
🧹 Nitpick comments (1)
src/app/endpoints/query.py (1)
495-499: Remove type ignores and make content extraction more robustAvoid the type: ignore by using getattr and handle non-str content safely. Also enrich the warning with conversation_id for easier triage.
Apply this diff:
- if response is not None and response.output_message is not None: # type: ignore[union-attr] - return str(response.output_message.content), conversation_id # type: ignore[union-attr] - - logger.warning("Response does not contain any message to be returned") - return "", conversation_id # fallback + output_message = getattr(response, "output_message", None) + if output_message is not None: + content = getattr(output_message, "content", None) + if content is not None: + return (content if isinstance(content, str) else str(content)), conversation_id + logger.warning( + "Response lacks output_message.content (conversation_id=%s)", + conversation_id, + ) + return "", conversation_id # fallback
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src/app/endpoints/query.py(1 hunks)
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🔇 Additional comments (2)
src/app/endpoints/query.py (2)
495-497: Good defensive check prevents None dereferenceThe null-guard on response/output_message eliminates a crash path and aligns with the PR objective.
498-499: Confirm API behavior: empty string vs. error/metricReturning an empty string may mask upstream issues and be indistinguishable from a legitimate empty model output. Do we want to:
- increment a failure/empty-output metric here, or
- return a 502/500 to surface upstream issues?
If current behavior is intentional, consider documenting it in retrieve_response’s docstring.
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@tisnik I'll conduct a full review of all changes in this PR addressing the potential None reference handling bug fix. ✅ Actions performedFull review triggered. |
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Description
LCORE-464: fix potential
Nonereference handlingType of change
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