Pydantic BaseModel subclasses always have __pydantic_generic_metadata__, so
the `if not meta` early-return was dead code. Collapse it into a ternary and
add a test for a plain (non-parameterized) ServerSentEvent subclass to reach
the `not args` branch, bringing fastapi/sse.py to 100% coverage.
Co-Authored-By: Claude Sonnet 4.6 <[email protected]>
Bare `ServerSentEvent` (without a type parameter) now silently resolves
to `ServerSentEvent[Any]`, so existing code and the `_check_data_exclusive`
return annotation require no changes and pass mypy without `[type-arg]`
errors.
Co-Authored-By: Claude Sonnet 4.6 <[email protected]>
Introduce `ServerSentEvent[Data]` so endpoints that yield typed SSE
events get a `contentSchema` in the OpenAPI spec reflecting the data
payload type, while retaining full control over SSE fields (`event`,
`id`, `retry`, `comment`).
- `ServerSentEvent` now inherits from `Generic[Data]` with `data: Data`
- `validate_default=True` ensures `ServerSentEvent[Item]()` raises a
ValidationError (data is effectively required when Data is concrete)
- `ServerSentEvent[Item | None]` allows optional data; bare
`ServerSentEvent` is fully backward compatible (`Data=Any`)
- Added `get_sse_data_type()` helper (uses Pydantic's
`__pydantic_generic_metadata__`) to extract `Data` from a
parameterized `ServerSentEvent[Data]` annotation
- Routing layer now extracts `Data` from `ServerSentEvent[Data]` and
uses it as `stream_item_type`, feeding it into the existing OpenAPI
`contentSchema` pipeline
- Added tutorial006 and corresponding snapshot test
- Extended test_sse.py with generic SSE unit and app-level tests
Co-Authored-By: Claude Sonnet 4.6 <[email protected]>
Fix "to to" and "that that" word duplications in security module docstrings,
and "be be" in test data string.
Co-authored-by: ahsan.sheraz <[email protected]>
Co-authored-by: Claude Opus 4.6 <[email protected]>
Sebastián Ramírez
dependabot[bot]
Sofie Van Landeghem
Kadir Can Ozden
Ben Mosher
pre-commit-ci-lite[bot]
Ahsan Sheraz
Motov Yurii