SQLAlchemy: avoiding repetition in declarative style class definition

Question

I\'m using SQLAlchemy, and many classes in my object model have the same two attributes: id and (integer & primary key), and name (a string). I\'m trying to avoid declaring

Answer 1

I think I got it to work.

I created a metaclass that derives from DeclarativeMeta, and made that the metaclass of C1 and C2. In that new metaclass, I simply said

def __new__(mcs, name, base, attr):
  attr['__tablename__'] = name.lower()
  attr['id'] = Column(Integer, primary_key = True)
  attr['name'] = Column(String)
  return super().__new__(mcs, name, base, attr)

And it seems to work fine.