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feat(events): add pagination to list_messages_by_run on all store backends

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Replicates the existing before_seq/after_seq/limit cursor-pagination pattern
from list_messages onto list_messages_by_run across the abstract interface,
MemoryRunEventStore, JsonlRunEventStore, and DbRunEventStore.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
rayhpeng
2026-04-12 15:58:33 +08:00
parent a36186cf54
commit 82374eb18c
5 changed files with 162 additions and 10 deletions
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backend/packages/harness/deerflow/runtime/events/store/base.py
+11 -1
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@@ -83,8 +83,18 @@ class RunEventStore(abc.ABC):
self,
thread_id: str,
run_id: str,
*,
limit: int = 50,
before_seq: int | None = None,
after_seq: int | None = None,
) -> list[dict]:
"""Return displayable messages (category=message) for a specific run, ordered by seq ascending."""
"""Return displayable messages (category=message) for a specific run, ordered by seq ascending.
Supports bidirectional cursor pagination:
- after_seq: return the first ``limit`` records with seq > after_seq (ascending)
- before_seq: return the last ``limit`` records with seq < before_seq (ascending)
- neither: return the latest ``limit`` records (ascending)
"""
@abc.abstractmethod
async def count_messages(self, thread_id: str) -> int: