Use of Pydantic V1 is incomaptible with Python 3.14 support

[colin-nolan]

Describe the Bug

Strawberry currently accepts both version 1 and 2 of Pydantic as a dependency

strawberry/pyproject.toml

Line 58 in 846b3c4

pydantic = ["pydantic>1.6.1"]

It also supports Python 3.14 (as implied by the test matricies).

According to Pydantic:

Pydantic V1 core functionality will not work properly with Python 3.14 or greater. As such, Python 3.13 is the latest supported Python version for V1.
https://pydantic.dev/articles/pydantic-v2-12-release#support-for-python-314

In order to (safely) work with Python 3.14, the (experimental - and extremely useful) Pydantic support needs to be updated to stop using V1 functionality if V2 is available (and Python 3.14+), e.g. update required to https://github.com/strawberry-graphql/strawberry/blob/846b3c46ce8ce8bd20250475b7010c2382ae7469/strawberry/experimental/pydantic/_compat.py.

System Information

• Operating system: n/a
• Python version: 3.14
• Strawberry version (if applicable): 0.284.1

Additional Context

Warnings get printed:

UserWarning: Core Pydantic V1 functionality isn't compatible with Python 3.14 or greater.

See more details in comment: #4043 (comment)

[patrick91]

UserWarning: Core Pydantic V1 functionality isn't compatible with Python 3.14 or greater.

interesting, can you post the full warning? and deps you have?

[colin-nolan]

Attached example.tar.gz as a minimal demonstration the issue.

Dependencies:

python = "^3.14"
strawberry-graphql = "^0.284.2"
pydantic = "^2.12.4"

Full warning message:

.venv/lib/python3.14/site-packages/strawberry/experimental/pydantic/_compat.py:302: UserWarning: Core Pydantic V1 functionality isn't compatible with Python 3.14 or greater.
from pydantic.v1.typing import is_new_type

[Atokulus]

Similar/same issue here:

.venv\Lib\site-packages\strawberry\experimental\pydantic\_compat.py:302: UserWarning: Core Pydantic V1 functionality isn't compatible with Python 3.14 or greater.
  from pydantic.v1.typing import is_new_type