AttributeError when sqlalchemy model has field created by column_property

[phaethon]

I have a model, which includes column_property

class User(Base):
  name = Column(Text)
  lastname = Column(Text)
  full_name = column_property(name + " " + lastname)

When I start application I get this stack trace:

...
  File "/home/myhome/strawberry-test/lib/python3.10/site-packages/strawberry_sqlalchemy_mapper/mapper.py", line 371, in _convert_column_to_strawberry_type
    if column.nullable:
  File "/home/myhome/strawberry-test/lib/python3.10/site-packages/sqlalchemy/sql/elements.py", line 1495, in __getattr__
    raise AttributeError(
AttributeError: Neither 'Label' object nor 'Comparator' object has an attribute 'nullable'

If I comment out the full_name field in the model, it works as expected.

Ubuntu 22.04, python 3.10, SQLAlchemy 2.027, psycopg 3.1.18, strawberry-sqlalchemy-mapper 0.4.2, strawberry-graphql 0.219.2

Upvote & Fund

• We're using Polar.sh so you can upvote and help fund this issue.
• We receive the funding once the issue is completed & confirmed by you.
• Thank you in advance for helping prioritize & fund our backlog.