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add comment linking pydantic issue

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JONEMI21 2026-01-28 12:48:05 +00:00
parent 2a2ed2fe5b
commit c7e6d8fba6
1 changed files with 5 additions and 0 deletions
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5
fastapi/_compat/v2.py
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@ -589,6 +589,11 @@ if shared.PYDANTIC_VERSION_MINOR_TUPLE >= (2, 6):
args = get_args(annotation)
if (origin is Union or origin is UnionType) and depth == 0:
# making the depth check since the values of dicts being Union types
# is not working as expected as of Pydantic v2.12.3 so we just omit at
# the top level Union here for now
# https://github.com/pydantic/pydantic-core/issues/1900
# https://github.com/pydantic/pydantic/issues/12750
return Union[tuple(_omit_by_default(arg) for arg in args)]
elif origin is list:
return list[_omit_by_default(args[0], depth=depth + 1)] # type: ignore[misc]