[fastapi] Handle ellipsis defaults in FAST002 autofix (FAST002)#20810
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ntBre merged 3 commits intoastral-sh:mainfrom Oct 21, 2025
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[fastapi] Handle ellipsis defaults in FAST002 autofix (FAST002)#20810ntBre merged 3 commits intoastral-sh:mainfrom
fastapi] Handle ellipsis defaults in FAST002 autofix (FAST002)#20810ntBre merged 3 commits intoastral-sh:mainfrom
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Thank you! This looks great. I just had a couple of small ideas/suggestions about the tests.
crates/ruff_linter/resources/test/fixtures/fastapi/FAST002_2.py
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It looks like the linux test failure was just a transient issue. The only real CI problem is the formatting. |
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Thanks for the review! I’ll update it soon. |
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Thank you! We just need to update one more minor thing in the snapshots.
I tried to push a commit, but GitHub said I didn't have permission. Sorry for the trouble!
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...hots/ruff_linter__rules__fastapi__tests__fast-api-non-annotated-dependency_FAST002_2.py.snap
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…in FAST002 tests snapshot
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* main: (65 commits) [ty] Some more simplifications when rendering constraint sets (#21009) [ty] Make `attributes.md` mdtests faster (#21030) [ty] Set `INSTA_FORCE_PASS` and `INSTA_OUTPUT` environment variables from mdtest.py (#21029) [ty] Fall back to `Divergent` for deeply nested specializations (#20988) [`ruff`] Autogenerate TypeParam nodes (#21028) [ty] Add assertions to ensure that we never call `KnownClass::Tuple.to_instance()` or similar (#21027) [`ruff`] Auto generate ast Pattern nodes (#21024) [`flake8-simplify`] Skip `SIM911` when unknown arguments are present (#20697) Render a diagnostic for syntax errors introduced in formatter tests (#21021) [ty] Support goto-definition on vendored typeshed stubs (#21020) [ty] Implement go-to for binary and unary operators (#21001) [ty] Avoid ever-growing default types (#20991) [syntax-errors] Name is parameter and global (#20426) [ty] Disable panicking mdtest (#21016) [ty] Fix completions at end of file (#20993) [ty] Fix out-of-order semantic token for function with regular argument after kwargs (#21013) [ty] Fix auto import for files with `from __future__` import (#20987) [`fastapi`] Handle ellipsis defaults in FAST002 autofix (`FAST002`) (#20810) [`ruff`] Skip autofix for keyword and `__debug__` path params (#20960) [`flake8-bugbear`] Skip `B905` and `B912` if <2 iterables and no starred arguments (#20998) ...
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Summary
Implement handling of ellipsis (
...) defaults in theFAST002autofix to correctly differentiate between required and optional parameters in FastAPI route definitions.Previously, the autofix did not properly handle cases where parameters used
...as a default value (to indicate required parameters). This could lead to incorrect transformations when applying the autofix.This change updates the
FAST002autofix logic to:...as a valid FastAPI required default.Fixes #20800
Test Plan
Added a new test fixture at:
crates/ruff_linter/resources/test/fixtures/fastapi/FAST002_2.py