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fix: deserialize LangChain messages in async checkpoint operations (#85, #87) #87

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Merged
merged 3 commits into from
Aug 15, 2025
Merged

fix: deserialize LangChain messages in async checkpoint operations (#85, #87) #87

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6ea6810
Fixes asynchronous message deserialization
aarongrtech Aug 14, 2025
96fead2
Create test_issue_85_async_deserialization.py
aarongrtech Aug 15, 2025
8fc750b
Update aio.py
aarongrtech Aug 15, 2025
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6 changes: 3 additions & 3 deletions langgraph/checkpoint/redis/aio.py
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Original file line number Diff line number Diff line change
Expand Up @@ -540,13 +540,13 @@ async def aget_tuple(self, config: RunnableConfig) -> Optional[CheckpointTuple]:
# Execute all tasks in parallel - pending_sends is optional
if doc_parent_checkpoint_id:
results = await asyncio.gather(*tasks)
channel_values: Dict[str, Any] = results[0]
channel_values: Dict[str, Any] = self._recursive_deserialize(results[0])
pending_sends: List[Tuple[str, Union[str, bytes]]] = results[1]
pending_writes: List[PendingWrite] = results[2]
else:
# Only channel_values and pending_writes tasks
results = await asyncio.gather(*tasks)
channel_values = results[0]
channel_values = self._recursive_deserialize(results[0])
pending_sends = []
pending_writes = results[1]

Expand Down Expand Up @@ -709,7 +709,7 @@ async def alist(
if isinstance(checkpoint_data, dict)
else orjson.loads(checkpoint_data)
)
channel_values = checkpoint_dict.get("channel_values", {})
channel_values = self._recursive_deserialize(checkpoint_dict.get("channel_values", {}))
else:
# If checkpoint data is missing, the document is corrupted
# Set empty channel values rather than attempting a fallback
Expand Down
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