Fix: Correct file variable handling for custom tools in workflow (#18427)
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@@ -318,6 +318,33 @@ class ToolNode(BaseNode):
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json.append(message.message.json_object)
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elif message.type == ToolInvokeMessage.MessageType.LINK:
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assert isinstance(message.message, ToolInvokeMessage.TextMessage)
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if message.meta:
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transfer_method = message.meta.get("transfer_method", FileTransferMethod.TOOL_FILE)
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else:
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transfer_method = FileTransferMethod.TOOL_FILE
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tool_file_id = message.message.text.split("/")[-1].split(".")[0]
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with Session(db.engine) as session:
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stmt = select(ToolFile).where(ToolFile.id == tool_file_id)
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tool_file = session.scalar(stmt)
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if tool_file is None:
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raise ToolFileError(f"Tool file {tool_file_id} does not exist")
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mapping = {
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"tool_file_id": tool_file_id,
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"type": file_factory.get_file_type_by_mime_type(tool_file.mimetype),
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"transfer_method": transfer_method,
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"url": message.message.text,
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}
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file = file_factory.build_from_mapping(
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mapping=mapping,
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tenant_id=self.tenant_id,
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)
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files.append(file)
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stream_text = f"Link: {message.message.text}\n"
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text += stream_text
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yield RunStreamChunkEvent(chunk_content=stream_text, from_variable_selector=[node_id, "text"])
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