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[Bugfix] Fix multi-round chat error when mistral tokenizer is used (#12859)

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Signed-off-by: Zifei Tong <zifeitong@gmail.com>
Co-authored-by: Cyrus Leung <cyrus.tl.leung@gmail.com>
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zifeitong 2025-02-07 23:04:34 -08:00 committed by GitHub
parent cc01223f3b
commit d01f66b039
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10
vllm/transformers_utils/tokenizers/mistral.py
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@ -291,6 +291,16 @@ class MistralTokenizer:
from mistral_common.protocol.instruct.request import (
ChatCompletionRequest)
# mistral-common requires AssistantMessage content to be string [1].
#
# [1]: https://github.com/mistralai/mistral-common/blob/f4a06998b75ed78bbf5aaf569590b772ea26c9f6/src/mistral_common/protocol/instruct/messages.py#L80
for message in messages:
if message.get("role") == "assistant":
content = message.get("content")
if isinstance(content, list):
content = "\n".join(chunk.get("text") for chunk in content)
message["content"] = content
request = ChatCompletionRequest(messages=messages,
tools=tools) # type: ignore[type-var]
encoded = self.mistral.encode_chat_completion(request)