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ragflow/api
bitloi a75ea7ba7c Fix: Chat completion generation parameter overrides (#15389)
### What problem does this PR solve?

Closes #15388.

Chat completion routes did not reliably honor per-request generation
settings:

- `/api/v1/chat/completions` copied generation settings with a
truthiness check, so valid zero values such as `temperature: 0`, `top_p:
0`, `frequency_penalty: 0`, `presence_penalty: 0`, and `max_tokens: 0`
were dropped.
- `/api/v1/openai/{chat_id}/chat/completions` did not forward standard
generation settings into the request-specific dialog LLM settings before
calling `async_chat`.

This PR preserves explicitly supplied generation parameters, including
zero values, and merges request-level overrides into existing dialog
settings where appropriate.

The supported generation parameter keys and merge behavior live in a
shared REST API helper to keep both completion routes aligned.

Validation:

- `git diff --check`
- `python3 -m py_compile api/apps/restful_apis/_generation_params.py
api/apps/restful_apis/chat_api.py api/apps/restful_apis/openai_api.py
test/testcases/test_http_api/test_session_management/test_session_sdk_routes_unit.py`
- `uv run ruff check api/apps/restful_apis/_generation_params.py
api/apps/restful_apis/chat_api.py api/apps/restful_apis/openai_api.py
test/testcases/test_http_api/test_session_management/test_session_sdk_routes_unit.py`
- `ZHIPU_AI_API_KEY=dummy uv run pytest
test/testcases/test_http_api/test_session_management/test_session_sdk_routes_unit.py
-q -k generation_params`

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
2026-06-03 11:46:10 +08:00
..
2025-10-18 16:09:48 +08:00
2026-06-02 19:04:20 +08:00
2025-12-10 13:34:08 +08:00