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fix(step): use 'is not None' guard to preserve falsy return values in @step decorator #2940

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fix(step): use 'is not None' guard to preserve falsy return values in @step decorator #2940

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3260373
fix(step): use 'is not None' guard in @step decorator output capture
devteamaegis May 29, 2026
98d81cb
fix(message): rename classmethod parameter 'self' to 'cls' in Message…
devteamaegis May 29, 2026
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2 changes: 1 addition & 1 deletion backend/chainlit/message.py
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Original file line number Diff line number Diff line change
Expand Up @@ -59,7 +59,7 @@ def __post_init__(self) -> None:
self.id = str(uuid.uuid4())

@classmethod
def from_dict(self, _dict: StepDict):
def from_dict(cls, _dict: StepDict):
type = _dict.get("type", "assistant_message")
return Message(
id=_dict["id"],
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4 changes: 2 additions & 2 deletions backend/chainlit/step.py
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Original file line number Diff line number Diff line change
Expand Up @@ -123,7 +123,7 @@ async def async_wrapper(*args, **kwargs):
logger.exception(e)
result = await func(*args, **kwargs)
try:
if result and not step.output:
if result is not None and not step.output:
step.output = result
except Exception as e:
step.is_error = True
Expand Down Expand Up @@ -154,7 +154,7 @@ def sync_wrapper(*args, **kwargs):
logger.exception(e)
result = func(*args, **kwargs)
try:
if result and not step.output:
if result is not None and not step.output:
step.output = result
except Exception as e:
step.is_error = True
Expand Down