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fix: nullable param type for function call (#2086)

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Nullable param type is not supported, e.g. ['string', 'null'], since it
fails type validation.

Tests:
Run inference with

        messages:
- content: You are a helpful assistant that can use tools to get
information.
          role: system
        - content: What's the temperature in San Francisco in celsius?
          role: user
        tools:
        - function:
            description: Get current temperature for a given location.
            name: get_weather
            parameters:
              additionalProperties: false
              properties:
                location:
description: "City and country e.g. Bogot\xE1, Colombia"
                  type: string
                unit:
                  description: "Unit of temperature, default to celsius"
                  type: [string, "null"]  # <= nullable type
              required:
              - location
              type: object
          type: function

Co-authored-by: Eric Huang <erichuang@fb.com>
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ehhuang 2025-05-01 13:17:36 -07:00 • committed by GitHub
parent 88a796ca5a
commit ffe3d0b2cd
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2
llama_stack/providers/utils/inference/openai_compat.py
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@ -873,7 +873,7 @@ def _convert_openai_request_tools(tools: Optional[List[Dict[str, Any]]] = None)
tool_param_properties = tool_params.get("properties", {}) tool_param_properties = tool_params.get("properties", {})
for tool_param_key, tool_param_value in tool_param_properties.items(): for tool_param_key, tool_param_value in tool_param_properties.items():
tool_param_def = ToolParamDefinition( tool_param_def = ToolParamDefinition(
param_type=tool_param_value.get("type", None), param_type=str(tool_param_value.get("type", None)),
description=tool_param_value.get("description", None), description=tool_param_value.get("description", None),
) )
lls_tool_params[tool_param_key] = tool_param_def lls_tool_params[tool_param_key] = tool_param_def