"SQLAlchemy" object has no field XXX when adding sqlalchemy options

[adam-mrozik]

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• I already checked if it is not related to SQLModel but to SQLAlchemy.

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Example Code

from sqlalchemy import CheckConstraint
from sqlalchemy.dialects.postgresql.base import UUID
from sqlalchemy.ext.declarative import declarative_base
# initialize sql-alchemy
# bring in UUID so migrations actually work
db = SQLAlchemy()  # type: ignore

db.UUID = UUID
# CheckConstraint
db.CheckConstraint = CheckConstraint


File "/usr/local/lib/python3.8/site-packages/sqlmodel/main.py", line 529, in __setattr__
  super().__setattr__(name, value)
File "pydantic/main.py", line 358, in pydantic.main.BaseModel.__setattr__
ValueError: "SQLAlchemy" object has no field "UUID"

Description

• Create SQLAlchemy instance
• Try to add UUID or CheckConstraint options
• Getting Above Value Error

I was optimistically trying to change frol SQLAlchemy to sqlmodel, but encountered some features do not seem to be supported.
Do you have some feedback around it?

Operating System

Linux

Operating System Details

No response

SQLModel Version

0.0.8

Python Version

Python 3.9.7

Additional Context

sqlalchemy = 1.4.41