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fix: models with system message and prompt input fail #2984

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Jul 26, 2024
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fix: models with system message and prompt input fail #2984

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8 changes: 6 additions & 2 deletions src/backend/base/langflow/base/models/model.py
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Original file line number Diff line number Diff line change
Expand Up @@ -143,20 +143,24 @@ def get_chat_result(
messages: list[Union[BaseMessage]] = []
if not input_value and not system_message:
raise ValueError("The message you want to send to the model is empty.")
if system_message:
messages.append(SystemMessage(content=system_message))
system_message_added = False
if input_value:
if isinstance(input_value, Message):
with warnings.catch_warnings():
warnings.simplefilter("ignore")
if "prompt" in input_value:
prompt = input_value.load_lc_prompt()
if system_message:
prompt.messages = [SystemMessage(content=system_message)] + prompt.messages
system_message_added = True
runnable = prompt | runnable
else:
messages.append(input_value.to_lc_message())
else:
messages.append(HumanMessage(content=input_value))

if system_message and not system_message_added:
messages.append(SystemMessage(content=system_message))
inputs: Union[list, dict] = messages or {}
try:
runnable = runnable.with_config( # type: ignore
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