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openwebui-claude-code
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Fix ValueError when no knowledge base is attached 

_build_kb_mcp_server() returns a 3-tuple (server, tool_names,
tools_by_name) on its normal path, and all three call sites unpack
three values. But the early return for the "no KB attached" case still
returned a 2-tuple (None, []), so every message sent without a knowledge
base attached raised:

    ValueError: not enough values to unpack (expected 3, got 2)

Return (None, [], {}) instead, and update the docstring to match.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Daniel Vickers 2026-07-18 09:24:50 -05:00
parent 5bbc1fcdf9
commit e495c963b5
1 changed files with 3 additions and 3 deletions
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6
claude_agent_pipe.py
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@ -369,8 +369,8 @@ def _build_kb_mcp_server(
user_dict: Optional[Dict[str, Any]] = None, user_dict: Optional[Dict[str, Any]] = None,
event_emitter: Optional[Callable] = None, event_emitter: Optional[Callable] = None,
): ):
"""Return (mcp_config, tool_names) for a knowledge-base search tool Claude """Return (mcp_config, tool_names, tools_by_name) for a knowledge-base
can invoke, or (None, []) if no KBs are attached. search tool Claude can invoke, or (None, [], {}) if no KBs are attached.
Result formatting follows OpenWebUI's native RAG shape (<source id=N ...> Result formatting follows OpenWebUI's native RAG shape (<source id=N ...>
tags + citation event), so Claude's replies render with inline [N] tags + citation event), so Claude's replies render with inline [N]
@ -379,7 +379,7 @@ def _build_kb_mcp_server(
that OpenWebUI's middleware already filtered by the user's grants. that OpenWebUI's middleware already filtered by the user's grants.
""" """
if not knowledge: if not knowledge:
return None, [] return None, [], {}
collection_names = [k["id"] for k in knowledge] collection_names = [k["id"] for k in knowledge]
display = ", ".join(k["name"] for k in knowledge) display = ", ".join(k["name"] for k in knowledge)