Bug: Pydantic validation aliases are not handled by coverage

[vrslev]

Description

ModelFactory.coverage() fails on models that have validation_alias set

MCVE

import typing

import pydantic
from polyfactory.factories.pydantic_factory import ModelFactory


class C(pydantic.BaseModel):
    a: typing.Annotated[str, pydantic.Field(validation_alias="b")]


class CFactory(ModelFactory[C]):
    pass


for _ in CFactory.coverage():
    pass

Logs

pydantic_core._pydantic_core.ValidationError: 1 validation error for C
b
  Field required [type=missing, input_value={'a': 'FdhLXuyqOfQSYmiqClUe'}, input_type=dict]
    For further information visit https://errors.pydantic.dev/2.7/v/missing

Release Version

2.16.2

Platform

• [ ] Linux
• [X] Mac
• [ ] Windows
• [ ] Other (Please specify in the description above)

[adhtruong]

Hi vrslev, this may be tricky to support as is given validation_alias may not be a str but an alias path as well. I will have a look to see if this can be done whilst being backwards compatible.

I would suggest setting populate_by_name on the pydantic model as a workaround in the meantime.

[adhtruong]

Closing in favour of https://github.com/litestar-org/polyfactory/issues/713. This documents workaround and should handle more general case here