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Merge pull request #2589 from stneng/main

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fix: get correct reducer when type has multiple metadata.
This commit is contained in:
Nuno Campos
2024-12-03 16:23:33 -05:00
committed by GitHub
parent dd010e9230 b80933c5fb
commit 75cccc4fc4
1 changed files with 2 additions and 2 deletions
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libs/langgraph/langgraph/graph/state.py
+2 -2
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@@ -933,12 +933,12 @@ def _is_field_binop(typ: Type[Any]) -> Optional[BinaryOperatorAggregate]:
if hasattr(typ, "__metadata__"):
meta = typ.__metadata__
if len(meta) >= 1 and callable(meta[-1]):
sig = signature(meta[0])
sig = signature(meta[-1])
params = list(sig.parameters.values())
if len(params) == 2 and all(
p.kind in (p.POSITIONAL_ONLY, p.POSITIONAL_OR_KEYWORD) for p in params
):
return BinaryOperatorAggregate(typ, meta[0])
return BinaryOperatorAggregate(typ, meta[-1])
else:
raise ValueError(
f"Invalid reducer signature. Expected (a, b) -> c. Got {sig}"