1.1.407 breaks the use of pydantic.dataclasses attributes #11060
Description
Describe the bug
When using the @pydantic.dataclasses.dataclass decorator, any reference to a class member (attribute, method, etc) is raised with a reportedAttributeAccessIssue.
Notably, the builtin dataclasses library does not have this issue.
Code or Screenshots
Here is some minimal code that reproduces this failure.
import pydantic
@pydantic.dataclasses.dataclass(frozen=True)
class SubModel:
a: int
b: int
@pydantic.dataclasses.dataclass(frozen=True)
class Model:
foo: SubModel
bar: int
@property
def a_from_foo(self) -> int:
return self.foo.a
if __name__ == '__main__':
m = Model(**{'foo': {'a': 1, 'b': 2}, 'bar': 3})
print('model', m)
print('a_from_foo', m.a_from_foo)The pydantic version used in testing is 2.9.2
The script is functional.
python pydantic_demo.py
model Model(foo=SubModel(a=1, b=2), bar=3)
a_from_foo 1
But pyright 1.1.407 flags this as an error.
pnpm exec pyright --version
pyright 1.1.407
pnpm exec pyright pydantic_demo.py
pydantic_demo.py
pydantic_demo.py:17:25 - error: Cannot access attribute "a" for class "PydanticDataclass"
Attribute "a" is unknown (reportAttributeAccessIssue)
pydantic_demo.py:23:27 - error: Cannot access attribute "a_from_foo" for class "PydanticDataclass"
Attribute "a_from_foo" is unknown (reportAttributeAccessIssue)
2 errors, 0 warnings, 0 informations
pyright 1.1.406 is happy with the file
pnpm exec pyright --version
pyright 1.1.406
pnpm exec pyright pydantic_demo.py
0 errors, 0 warnings, 0 informations