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fix(checkpoint): update blob access to support JSON path syntax #117

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merged 1 commit into from
Nov 14, 2025
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fix(checkpoint): update blob access to support JSON path syntax #117

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31 changes: 19 additions & 12 deletions langgraph/checkpoint/redis/aio.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1724,7 +1724,7 @@ async def _abatch_load_pending_sends(
return_fields=[
"checkpoint_id",
"type",
"blob",
"$.blob",
"task_path",
"task_id",
"idx",
Expand All @@ -1745,20 +1745,27 @@ async def _abatch_load_pending_sends(
# Sort and format results for each parent checkpoint
for parent_checkpoint_id in parent_checkpoint_ids:
batch_key = (thread_id, checkpoint_ns, parent_checkpoint_id)
docs = writes_by_checkpoint.get(parent_checkpoint_id, [])

# Sort for deterministic order
sorted_docs = sorted(
docs,
key=lambda d: (
getattr(d, "task_path", ""),
getattr(d, "task_id", ""),
getattr(d, "idx", 0),
writes = writes_by_checkpoint.get(parent_checkpoint_id, [])

# Sort results by task_path, task_id, idx
sorted_writes = sorted(
writes,
key=lambda x: (
getattr(x, "task_path", ""),
getattr(x, "task_id", ""),
getattr(x, "idx", 0),
),
)

# Convert to expected format
results_map[batch_key] = [(d.type, d.blob) for d in sorted_docs]
# Extract type and blob pairs
# Handle both direct attribute access and JSON path access
results_map[batch_key] = [
(
getattr(doc, "type", ""),
getattr(doc, "$.blob", getattr(doc, "blob", b"")),
)
for doc in sorted_writes
]

return results_map

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