type object 'Base' has no attribute '_decl_class_registry'

Question

I am upgrading a library to a recent version of SQLAlchemy and I am getting this error

type object 'Base' has no attribute '_decl_class_registry'

On line

Base = declarative_base(metadata=metadata)

Base._decl_class_registry

How can I solve this?

Answer 1

Had the same problem. Because of my upgrade of sqlalchemy looks like there is a change in the base code.

use this instead to accomplish the same

Base.registry._class_registry.values()