old_contents: from sqlalchemy.dialects.postgresql import UUID
  import sqlalchemy
  import uuid
  from .. import db
  
  
  class Base(object):
      id = db.Column(UUID, default=lambda: str(uuid.uuid4()), primary_key=True)
      created_at = db.Column(db.DateTime(), default=sqlalchemy.func.now())
      updated_at = db.Column(
          sqlalchemy.DateTime(), default=sqlalchemy.func.now(),
          onupdate=sqlalchemy.func.now())
  
      __mapper_args__ = {'order_by': sqlalchemy.desc('updated_at')}
  
  
  from .content import *
  from .users import *
  
new_contents: from sqlalchemy.dialects.postgresql import UUID
  import sqlalchemy
  import uuid
  from .. import db
  
  
  class Base(object):
      id = db.Column(UUID, default=lambda: str(uuid.uuid4()), primary_key=True)
      created_at = db.Column(db.DateTime(), default=sqlalchemy.func.now())
      updated_at = db.Column(
          sqlalchemy.DateTime(), default=sqlalchemy.func.now(),
          onupdate=sqlalchemy.func.now())
  
      __mapper_args__ = {'order_by': sqlalchemy.desc('updated_at')}
  
  
  from .users import *
  
subject: remove unused content moduleg