dripsmvcp 12a148d541 fix(api): guard against missing session in get_agent_session (#15011) ...

`GET /agents/<agent_id>/sessions/<session_id>` crashed with
`AttributeError: 'NoneType' object has no attribute 'to_dict'` when the
session lookup failed: `_, conv =
API4ConversationService.get_by_id(...)` returned `(False, None)`, then
`conv.to_dict()` was called unconditionally.

This is reachable in multi-instance deployments: the session row may not
yet be visible on the node servicing the immediate follow-up GET after a
session is created on a different node.

Add the same `if not exists` guard already used by every other call site
of `API4ConversationService.get_by_id` (see agent_api.py:1147,
sdk/session.py:179, conversation_service.py:248, canvas_service.py:323).

Closes #14989

### What problem does this PR solve?

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

### Type of change

- [ ] Bug Fix (non-breaking change which fixes an issue)
- [ ] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):

2026-05-21 15:37:10 +08:00

..

apps

fix(api): guard against missing session in get_agent_session (#15011)

2026-05-21 15:37:10 +08:00

common

Feat：admin api (#10642)

2025-10-18 16:09:48 +08:00

db

Fix: remove duplicate function definitions (#15063)

2026-05-21 15:31:51 +08:00

utils

Refactor: enhance graphrag - part 2 (#14972)

2026-05-18 16:10:21 +08:00

__init__.py

Fix: incorrect async chat streamly output (#11679)

2025-12-03 11:15:45 +08:00

constants.py

Feat/memory (#11812)

2025-12-10 13:34:08 +08:00

ragflow_server.py

Speed up ragflow server (#14894)

2026-05-13 18:01:33 +08:00

settings.py

Move api.settings to common.settings (#11036)

2025-11-06 09:36:38 +08:00

validation.py

Fix errors detected by Ruff (#3918)

2024-12-08 14:21:12 +08:00