Pydantic V2 Configuration Warning

[patrickwasp]

Pydantic V2 Configuration Warning with FastAPI Users + SQLModel

Describe the bug

Pydantic V2 configuration warning appears when using FastAPI Users with SQLModel: UserWarning: Valid config keys have changed in V2: 'orm_mode' has been renamed to 'from_attributes'

To Reproduce

Steps to reproduce the behavior:

1. Create a FastAPI application using SQLModel and FastAPI Users
2. Import the fastapi_users_db_sqlmodel module
3. Run the application
4. Warning appears in console output from pydantic internal config

Expected behavior

No warnings should appear when using FastAPI Users with SQLModel, as the configuration should be compatible with Pydantic V2.

Configuration

• Python version: 3.12
• FastAPI version: latest
• FastAPI Users version: latest

FastAPI Users configuration

from fastapi_users.db import SQLAlchemyBaseUserTable
from sqlmodel import SQLModel

class User(SQLModel, SQLAlchemyBaseUserTable):
    class Config:
        arbitrary_types_allowed = True

Additional context

• The warning appears to be related to the interaction between Pydantic V2's configuration changes and SQLModel's internal usage of Pydantic
• This occurs specifically when importing fastapi_users_db_sqlmodel
• The warning suggests updating 'orm_mode' to 'from_attributes', but this configuration is likely internal to one of the dependencies
• Reference: https://github.com/fastapi/sqlmodel/blob/6b562358fc1e857dd1ce4b8b23a9f68c0337430d/sqlmodel/main.py#L680