fix: return 4xx for non-existent resources in GET requests (#1635)

# What does this PR do?

- Removed Optional return types for GET methods
- Raised ValueError when requested resource is not found
- Ensures proper 4xx response for missing resources
- Updated the API generator to check for wrong signatures

```
$ uv run --with ".[dev]" ./docs/openapi_generator/run_openapi_generator.sh
Validating API method return types...

API Method Return Type Validation Errors:

Method ScoringFunctions.get_scoring_function returns Optional type
```

Closes: https://github.com/meta-llama/llama-stack/issues/1630

## Test Plan

Run the server then:

```
curl http://127.0.0.1:8321/v1/models/foo     
{"detail":"Invalid value: Model 'foo' not found"}%  
```

Server log:

```
INFO:     127.0.0.1:52307 - "GET /v1/models/foo HTTP/1.1" 400 Bad Request
09:51:42.654 [END] /v1/models/foo [StatusCode.OK] (134.65ms)
 09:51:42.651 [ERROR] Error executing endpoint route='/v1/models/{model_id:path}' method='get'
Traceback (most recent call last):
  File "/Users/leseb/Documents/AI/llama-stack/llama_stack/distribution/server/server.py", line 193, in endpoint
    return await maybe_await(value)
  File "/Users/leseb/Documents/AI/llama-stack/llama_stack/distribution/server/server.py", line 156, in maybe_await
    return await value
  File "/Users/leseb/Documents/AI/llama-stack/llama_stack/providers/utils/telemetry/trace_protocol.py", line 102, in async_wrapper
    result = await method(self, *args, **kwargs)
  File "/Users/leseb/Documents/AI/llama-stack/llama_stack/distribution/routers/routing_tables.py", line 217, in get_model
    raise ValueError(f"Model '{model_id}' not found")
ValueError: Model 'foo' not found
```

Signed-off-by: Sébastien Han <seb@redhat.com>
This commit is contained in:
Sébastien Han 2025-03-18 22:06:53 +01:00 committed by GitHub
parent cca9bd6cc3
commit c029fbcd13
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GPG key ID: B5690EEEBB952194
14 changed files with 112 additions and 136 deletions

View file

@ -135,7 +135,7 @@ class ScoringFunctions(Protocol):
async def list_scoring_functions(self) -> ListScoringFunctionsResponse: ...
@webmethod(route="/scoring-functions/{scoring_fn_id:path}", method="GET")
async def get_scoring_function(self, scoring_fn_id: str, /) -> Optional[ScoringFn]: ...
async def get_scoring_function(self, scoring_fn_id: str, /) -> ScoringFn: ...
@webmethod(route="/scoring-functions", method="POST")
async def register_scoring_function(