Update _types.py

[Flyguy]

If flask_sqlalchemy doesn't used. It will throw exception.

[hasansezertasan]

Thanks, this fixes a real optional-dependency import failure. Please run pre-commit to clear the style failure and add a regression check for importing flask_admin.contrib.sqla.ModelView without Flask-SQLAlchemy installed.

[ElLorans]

The regression check is already in #2959, @Flyguy you can fork cjmayo:test-flask-sqlalchemy-lite and PR directly the author. To run pre-commit you can run pre-commit install as outlined in the readme and then every commit will trigger it. I think you can also trigger it manually with pre-commit run --all-files

[hasansezertasan]

Thanks for pointing out #2959—I missed that existing coverage. No need to duplicate it here. Once formatting is fixed, let’s verify this fix with the Lite-only test environment from #2959.

[Flyguy]

White space fixed