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[BugFix] Do not raise a ValueError when tool_choice is set to the supported none option and tools are not defined. (#10000)

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Signed-off-by: Guillaume Calmettes <gcalmettes@scaleway.com>
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Guillaume Calmettes 2024-11-12 12:13:46 +01:00 committed by GitHub
parent d201d41973
commit 36c513a076
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3 changed files with 19 additions and 6 deletions
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4
docs/source/serving/openai_compatible_server.md
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@ -215,10 +215,10 @@ The order of priorities is `command line > config file values > defaults`.
---
## Tool calling in the chat completion API
vLLM supports named function calling and `auto` tool choice in the chat completion API. The `tool_choice` options `required` is **not yet supported** but on the roadmap.
vLLM currently supports named function calling, as well as the `auto` and `none` options for the `tool_choice` field in the chat completion API. The `tool_choice` option `required` is **not yet supported** but on the roadmap.
It is the callers responsibility to prompt the model with the tool information, vLLM will not automatically manipulate the prompt.
Please see below for recommended configuration and chat templates to use when function calling is to be used with the different models.
### Named Function Calling

10
vllm/entrypoints/openai/protocol.py
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@ -454,6 +454,12 @@ class ChatCompletionRequest(OpenAIBaseModel):
if "tool_choice" not in data and data.get("tools"):
data["tool_choice"] = "auto"
# if "tool_choice" is "none" -- ignore tools if present
if "tool_choice" in data and data["tool_choice"] == "none":
# ensure that no tools are present
data.pop("tools", None)
return data
# if "tool_choice" is specified -- validation
if "tool_choice" in data:
@ -467,8 +473,8 @@ class ChatCompletionRequest(OpenAIBaseModel):
if data["tool_choice"] != "auto" and not isinstance(
data["tool_choice"], dict):
raise ValueError(
"`tool_choice` must either be a named tool or \"auto\". "
"`tool_choice=\"none\" is not supported.")
"`tool_choice` must either be a named tool, \"auto\", "
"or \"none\".")
# ensure that if "tool_choice" is specified as an object,
# it matches a valid tool

11
vllm/entrypoints/openai/serving_engine.py
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@ -469,12 +469,19 @@ class OpenAIServing:
mm_data = await mm_data_future
if tool_parser is not None:
# tool parsing is done only if a tool_parser has been set and if
# tool_choice is not "none" (if tool_choice is "none" but a tool_parser
# is set, we want to prevent parsing a tool_call hallucinated by the LLM
should_parse_tools = tool_parser is not None and (hasattr(
request, "tool_choice") and request.tool_choice != "none")
if should_parse_tools:
if not isinstance(request, ChatCompletionRequest):
msg = "Tool usage is only supported for Chat Completions API"
raise NotImplementedError(msg)
request = tool_parser(tokenizer).adjust_request(request=request)
request = tool_parser(tokenizer).adjust_request( # type: ignore
request=request)
if isinstance(request_prompt, str):
prompt_inputs = self._tokenize_prompt_input(