Bug: pydantic_factory fails with Python v3.14 and Pydantic v2.12.x

[natelandau]

Description

When running Python v3.14, Polyfactory fails to run Pydantic factories due to upstream changes in Pydantic v2.12. The newest Pydantic version now throws a UserWarning when trying to import Pydantic v1. The relevant PR is: pydantic/pydantic#12367

Polyfactory attempts to load pydantic v1 on line 85 of factories/pydantic_factory.py in a try/except block that now fails instead of the expected behavior of loading Pydantic v2.

URL to code causing the issue

No response

MCVE

Steps to reproduce

Screenshots

Logs

File "/Users/user/repos/vapi2/.venv/lib/python3.14/site-packages/polyfactory/__init__.py", line 2, in <module>
    from .factories import BaseFactory
  File "/Users/user/repos/vapi2/.venv/lib/python3.14/site-packages/polyfactory/factories/__init__.py", line 1, in <module>
    from polyfactory.factories.base import BaseFactory
  File "/Users/user/repos/vapi2/.venv/lib/python3.14/site-packages/polyfactory/factories/base.py", line 1270, in <module>
    _register_builtin_factories()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/Users/user/repos/vapi2/.venv/lib/python3.14/site-packages/polyfactory/factories/base.py", line 1265, in _register_builtin_factories
    import_module(module)
    ~~~~~~~~~~~~~^^^^^^^^
  File "/Users/user/.local/share/uv/python/cpython-3.14.0-macos-aarch64-none/lib/python3.14/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/user/repos/vapi2/.venv/lib/python3.14/site-packages/polyfactory/factories/pydantic_factory.py", line 85, in <module>
    import pydantic.v1 as pydantic_v1  # type: ignore[no-redef]
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/user/repos/vapi2/.venv/lib/python3.14/site-packages/pydantic/v1/__init__.py", line 138, in <module>
    warnings.warn(
    ~~~~~~~~~~~~~^
        "Core Pydantic V1 functionality isn't compatible with Python 3.14 or greater.",
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        UserWarning,
        ^^^^^^^^^^^^
        stacklevel=2,
        ^^^^^^^^^^^^^
    )
    ^
UserWarning: Core Pydantic V1 functionality isn't compatible with Python 3.14 or greater.

Release Version

2.22.2

Platform

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

[adhtruong]

Hi @natelandau , I've added support for 3.14 in latest release now. Currently capturing this warning to avoid leaking to usage but unable to make fail. Is the failure from an additional setting or is there an MVCE for this? Does the latest release work here now?

[jodal]

I think this is resolved.

As a data point: In our test suite, we convert all warnings to errors. Previously we had to ignore the UserWarning: Core Pydantic V1 functionality isn't compatible with Python 3.14 or greater. using filterwarnings in our pytest setup. After the upgrade to polyfactory 3.1.0 today, we no longer need this ignore.

[adhtruong]

Great. Thanks for confirming!